检索结果-内蒙古大学图书馆

arXiv 2023年

作者： McClure, M.K. Rocha, W.R.M. Pontoppidan, K.M. Crouzet, N. Chu, L.E.U. Dartois, E. Lamberts, T. Noble, J.A. Pendleton, Y.J. Perotti, G. Qasim, D. Rachid, M.G. Smith, Z.L. Sun, F. Beck, Tracy L. Boogert, A.C.A. Brown, W.A. Caselli, P. Charnley, S.B. Cuppen, Herma M. Dickinson, H. Drozdovskaya, M.N. Egami, E. Erkal, J. Fraser, H. Garrod, R.T. Harsono, D. Ioppolo, S. Jiménez-Serra, I. Jin, M. Jørgensen, J.K. Kristensen, L.E. Lis, D.C. McCoustra, M.R.S. McGuire, Brett A. Melnick, G.J. Öberg, Karin I. Palumbo, M.E. Shimonishi, T. Sturm, J.A. van Dishoeck, E.F. Linnartz, H. Leiden Observatory Leiden University PO Box 9513 LeidenNL–2300 RA Netherlands Laboratory for Astrophysics Leiden Observatory Leiden University PO Box 9513 LeidenNL–2300 RA Netherlands Space Telescope Science Institute 3700 San Martin Drive BaltimoreMD21218 United States NASA Postdoctoral Program Fellow NASA Ames Research Center M/S 245-1 Moffett FieldCA94035 United States Institut des Sciences Moléculaires d’Orsay CNRS Univ. Paris-Saclay Orsay91405 France Leiden Institute of Chemistry Gorlaeus Laboratories Leiden University PO Box 9502 Leiden2300 RA Netherlands Physique des Interactions Ioniques et Moléculaires CNRS Aix Marseille Univ. Marseille13397 France Department of Physics University of Central Florida OrlandoFL32816 United States Max Planck Institute for Astronomy Königstuhl 17 HeidelbergD-69117 Germany Southwest Research Institute San AntonioTX78238 United States School of Physical Sciences The Open University Walton Hall Milton KeynesMK7 6AA United Kingdom Steward Observatory University of Arizona 933 N. Cherry Avenue TucsonAZ85721 United States Institute for Astronomy University of Hawai’i at Manoa 2680 Woodlawn Drive HonoluluHI96822 United States Department of Chemistry University of Sussex Falmer BrightonBN1 9QG United Kingdom Max-Planck-Institut für extraterrestrische Physik Gießenbachstrasse 1 Garching bei München85748 Germany Solar System Exploration Division NASA Goddard Space Flight Center GreenbeltMD20771 United States Radboud University Institute for Molecules and Materials Nijmegen6525 AJ Netherlands Center for Space and Habitability Universität Bern Gesellschaftsstrasse 6 Bern3012 Switzerland Departments of Astronomy & Chemistry University of Virginia CharlottesvilleVA22904 United States Institute of Astronomy Department of Physics National Tsing Hua University Hsinchu Taiwan Center for Interstellar Catalysis Department of Physics and Astronomy Aarhus University Ny Munkegade 120 Aarhus C80

Icy grain mantles are the main reservoir of the volatile elements that link chemical processes in dark, interstellar clouds with the formation of planets and composition of their atmospheres. The initial ice composition is set in the cold, dense parts of molecular clouds, prior to the onset of star formation. With the exquisite sensitivity of JWST, this critical stage of ice evolution is now accessible for detailed study. Here we show the first results of the Early Release science program "Ice Age" that reveal the rich composition of these dense cloud ices. Weak ices, including, 13CO2, OCN−13CO, OCS, and COMs functional groups are now detected along two pre-stellar lines of sight. The 12CO2 ice profile indicates modest growth of the icy grains. Column densities of the major and minor ice species indicate that ices contribute between 2 and 19% of the bulk budgets of the key C, O, N, and S elements. Our results suggest that the formation of simple and complex molecules could begin early in a water-ice rich environment. © 2023, CC BY.

关键词： Budget control

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Tuning band alignment at a semiconductor-crystalline oxide heterojunction via electrostatic modulation of the interfacial dipole

arXiv

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arXiv 2021年

作者： Chrysler, M. Gabel, J. Lee, T.-L. Penn, A.N. Matthews, B.E. Kepaptsoglou, D.M. Ramasse, Q.M. Paudel, J.R. Sah, R.K. Grassi, J.D. Zhu, Z. Gray, A.X. LeBeau, J.M. Spurgeon, S.R. Chambers, S.A. Sushko, P.V. Ngai, Joe H. Department of Physics University of Texas-Arlington ArlingtonTX76019 United States Diamond Light Source Ltd. Harwell Science and Innovation Campus DidcotOX11 0DE United Kingdom Department of Materials Science & Engineering North Carolina State University RaleighNC27695 United States Energy and Environment Directorate Pacific Northwest National Laboratory RichlandWA99352 United States SuperSTEM Daresbury WarringtonWA4 4AD United Kingdom Department of Physics University of York YorkYO10 5DD United Kingdom School of Physics and Astronomy School of Chemical and Process Engineering University of Leeds LeedsLS2 9JT United Kingdom Department of Physics Temple University PhiladelphiaPA19122 United States Environmental Molecular Sciences Laboratory Earth and Biological Sciences Directorate Pacific Northwest National Laboratory RichlandWA99352 United States Department of Materials Science & Engineering Massachusetts Institute of Technology CambridgeMA02139 United States Physical Sciences Division Physical & Computational Sciences Directorate Pacific Northwest National Laboratory RichlandWA99352 United States

We demonstrate that the interfacial dipole associated with bonding across the SrTiO3/Si heterojunction can be tuned through space charge, thereby enabling the band alignment to be altered via doping. Oxygen impurities in Si act as donors that create space charge by transferring electrons across the interface into SrTiO3. The space charge induces an electric field that modifies the interfacial dipole, thereby tuning the band alignment from type-II to type-III. The transferred charge, resulting in built-in electric fields, and change in band alignment are manifested in electrical transport and hard x-ray photoelectron spectroscopy measurements. Ab initio models reveal the interplay between polarization and band offsets. We find that band offsets can be tuned by modulating the density of space charge across the interface. Functionalizing the interface dipole to enable electrostatic altering of band alignment opens new pathways to realize novel behavior in semiconducting heterojunctions. © 2021, CC BY.

关键词： Heterojunctions

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Transverse ultrafast laser inscription in bulk silicon

arXiv

引用

arXiv 2021年

作者： Chambonneau, Maxime Blothe, M. Li, Q. Fedorov, V.Yu. Heuermann, T. Gebhardt, M. Gaida, C. Tertelmann, S. Sotier, F. Limpert, J. Tzortzakis, S. Nolte, S. Abbe Center of Photonics Institute of Applied Physics Friedrich-Schiller-University Jena Albert-Einstein-Strae 15 Jena07745 Germany Science Program Texas A and M University at Qatar P.O. Box 23874 Doha Qatar P. N. Lebedev Physical Institute of Russian Academy of Sciences 53 Leninskiy Prospekt Moscow119991 Russia Helmholtz-Institute Jena Frobelstieg 3 Jena07743 Germany Active Fiber Systems GmbH Ernst-Ruska-Ring 17 Jena07745 Germany Innolas Photonics GmbH Justus-von-Liebig-Ring 8 Krailling82152 Germany Center of Excellence in Photonics Fraunhofer Institute for Applied Optics and Precision Engineering Iof Albert-Einstein-Strae 7 Jena07745 Germany P.O. Box 1527 HeraklionGR-71110 Greece Materials Science and Technology Department University of Crete Heraklion71003 Greece

In-volume ultrafast laser direct writing of silicon is generally limited by strong nonlinear propagation effects preventing the initiation of modifications. By employing a triple-optimization procedure in the spectral, temporal and spatial domains, we demonstrate that modifications can be repeatably produced inside silicon. Our approach relies on irradiation at 2-μm wavelength with temporallydistorted femtosecond pulses. These pulses are focused in a way that spherical aberrations of different origins counterbalance, as predicted by point spread function analyses and in good agreement with nonlinear propagation simulations. We also establish the laws governing modification growth on a pulse-to-pulse basis, which allows us to demonstrate transverse inscription inside silicon with various line morphologies depending on the irradiation conditions. We finally show that the production of single-pulse repeatable modifications is a necessary condition for reliable transverse inscription inside silicon. © 2021, CC BY.

关键词： Silicon

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Quantifying Degradation Parameters of Single-Crystalline Ni-Rich Cathodes in Lithium-Ion Batteries

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Angewandte Chemie 2023年第32期135卷

作者： Dr. Wengao Zhao Dr. Kuan Wang Prof. Xinming Fan Fucheng Ren Xieyu Xu Dr. Yangyang Liu Dr. Shizhao Xiong Dr. Xiangsi Liu Zhengfeng Zhang Mayan Si Ruizhuo Zhang Dr. Wessel van den Bergh Prof. Pengfei Yan Dr. Corsin Battaglia Dr. Torsten Brezesinski Prof. Yong Yang Institute of Nanotechnology Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany Materials for Energy Conversion Empa—Swiss Federal Laboratories for Materials Science and Technology 8600 Dübendorf Switzerland Beijing Key Laboratory of Microstructure and Properties of Solids Faculty of Materials and Manufacturing Beijing University of Technology Beijing 100124 China School of Metallurgy and Environment Central South University Changsha 410083 China College of Chemistry and Chemical Engineering & State Key Lab for Physical Chemistry of Solid Surfaces & College of Energy Xiamen University Xiamen 361005 China State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 China Department of Physics Chalmers University of Technology 41296 Göteborg Sweden

Single-crystal LiNi x Co y Mn z O 2 (SC-NCM, x + y + z =1) cathodes are renowned for their high structural stability and reduced accumulation of adverse side products during long-term cycling. While advances have been made using SC-NCM cathode materials, careful studies of cathode degradation mechanisms are scarce. Herein, we employed quasi single-crystalline LiNi 0.65 Co 0.15 Mn 0.20 O 2 (SC-NCM65) to test the relationship between cycling performance and material degradation for different charge cutoff potentials. The Li/SC-NCM65 cells showed >77 % capacity retention below 4.6 V vs. Li + /Li after 400 cycles and revealed a significant decay to 56 % for 4.7 V cutoff. We demonstrate that the SC-NCM65 degradation is due to accumulation of rock-salt (NiO) species at the particle surface rather than intragranular cracking or side reactions with the electrolyte. The NiO-type layer formation is also responsible for the strongly increased impedance and transition-metal dissolution. Notably, the capacity loss is found to have a linear relationship with the thickness of the rock-salt surface layer. Density functional theory and COMSOL Multiphysics modeling analysis further indicate that the charge-transfer kinetics is decisive, as the lower lithium diffusivity of the NiO phase hinders charge transport from the surface to the bulk.

关键词： Single-Crystal Cathodes Structural Stability Rock-Salt Formation Multiphysics Analysis Transfer Kinetics

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EMPRESS. IX. Extremely Metal-Poor Galaxies are Very Gas-Rich Dispersion-Dominated Systems: Will JWST Witness Gaseous Turbulent High-z Primordial Galaxies?

arXiv

引用

arXiv 2022年

作者： Isobe, Yuki Ouchi, Masami Nakajima, Kimihiko Ozaki, Shinobu Bouché, Nicolas F. Wise, John H. Xu, Yi Emsellem, Eric Kusakabe, Haruka Hattori, Takashi Nagao, Tohru Chiaki, Gen Fukushima, Hajime Harikane, Yuichi Hayashi, Kohei Hirai, Yutaka Kim, Ji Hoon Maseda, Michael V. Nagamine, Kentaro Shibuya, Takatoshi Sugahara, Yuma Yajima, Hidenobu Aoyama, Shohei Fujimoto, Seiji Fukushima, Keita Hatano, Shun Inoue, Akio K. Ishigaki, Tsuyoshi Kawasaki, Masahiro Kojima, Takashi Komiyama, Yutaka Koyama, Shuhei Koyama, Yusei Lee, Chien-Hsiu Matsumoto, Akinori Mawatari, Ken Moriya, Takashi J. Motohara, Kentaro Murai, Kai Nishigaki, Moka Onodera, Masato Ono, Yoshiaki Rauch, Michael Saito, Tomoki Sasaki, Rin Suzuki, Akihiro Takeuchi, Tsutomu T. Umeda, Hiroya Umemura, Masayuki Watanabe, Kuria Yabe, Kiyoto Zhang, Yechi Institute for Cosmic Ray Research The University of Tokyo 5-1-5 Kashiwanoha Chiba Kashiwa277-8582 Japan Department of Physics Graduate School of Science The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-0033 Japan National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan University of Tokyo Chiba Kashiwa277-8583 Japan Univ Lyon Univ Lyon1 ENS de Lyon CNRS Centre de Recherche Astrophysique de Lyon UMR5574 Saint-Genis-LavalF-69230 France Center for Relativistic Astrophysics School of Physics Georgia Institute of Technology AtlantaGA30332 United States Department of Astronomy Graduate School of Science The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-0033 Japan European Southern Observatory Karl-Schwarzschild-Straße 2 Garching85748 Germany Observatoire de Genéve Université de Genéve 51 Ch. des Maillettes Versoix1290 Switzerland 650 North A'ohoku Place HiloHI96720 United States Research Center for Space and Cosmic Evolution Ehime University Bunkyo-cho 2-5 Ehime Matsuyama790-8577 Japan Center for Computational Sciences University of Tsukuba Ten-nodai 1-1-1 Tsukuba Ibaraki305-8577 Japan Department of Physics and Astronomy University College London Gower Street LondonWC1E 6BT United Kingdom National Institute of Technology Ichinoseki College Hagisho Ichinoseki021-8511 Japan Astronomical Institute Tohoku University 6-3 Aoba Aramaki Aoba-ku Miyagi Sendai980-8578 Japan Department of Physics and Astronomy University of Notre Dame 225 Nieuwland Science Hall Notre DameIN46556 United States Astronomy Program Department of Physics and Astronomy Seoul National University 1 Gwanak-ro Gwanak-gu Seoul08826 Korea Republic of SNU Astronomy Research Center Seoul National University 1 Gwanak-ro Gwanak-gu Seoul08826 Korea Republic of Department of Astronomy University of Wisconsin-Madison 475 N. Charter Street MadisonWI53706 United States Theoretical Astrophysics Department of Earth & Space S

We present kinematics of 6 local extremely metal-poor galaxies (EMPGs) with low metallicities (0.016 − 0.098 Z☉) and low stellar masses (104.7 − 107.6M☉). Taking deep medium-high resolution (R ∼ 7500) integral-field spectra with 8.2-m Subaru, we resolve the small inner velocity gradients and dispersions of the EMPGs with Hα emission. Carefully masking out sub-structures originated by inflow and/or outflow, we fit 3-dimensional disk models to the observed Hα flux, velocity, and velocity-dispersion maps. All the EMPGs show rotational velocities (vrot) of 5-23 km s−1 smaller than the velocity dispersions (σ0) of 17-31 km s−1, indicating dispersion-dominated (vrot/σ0 = 0.29−0.80 gas 0.9 − 1.0. Comparing our results with other Hα kinematics studies, we find that vrot/σ0 decreases and fgas increases with decreasing metallicity, decreasing stellar mass, and increasing specific star-formation rate. We also find that simulated high-z (z ∼ 7) forming galaxies have gas fractions and dynamics similar to the observed EMPGs. Our EMPG observations and the simulations suggest that primordial galaxies are gas-rich dispersion-dominated systems, which would be identified by the forthcoming James Webb Space Telescope (JWST) observations at z ∼ 7. Copyright © 2022, The Authors. All rights reserved.

关键词： Galaxies

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Rubin ToO 2024: Envisioning the Vera C. Rubin Observatory LSST Target of Opportunity program

arXiv

引用

arXiv 2024年

作者： Andreoni, Igor Margutti, Raffaella Banovetz, John Greenstreet, Sarah Hébert, Claire-Alice Lister, Tim Palmese, Antonella Piranomonte, Silvia Smartt, S.J. Smith, Graham P. Stein, Robert Ahumada, Tomas Anand, Shreya Auchettl, Katie Bannister, Michele T. Bellm, Eric C. Bloom, Joshua S. Bolin, Bryce T. Bom, Clecio R. Brethauer, Daniel Brucker, Melissa J. Buckley, David A.H. Chandra, Poonam Chornock, Ryan Christensen, Eric Cooke, Jeff Corsi, Alessandra Coughlin, Michael W. Cuevas-Otahola, Bolivia Filippo, D'Ammando Dai, Biwei Dhawan, S. Filippenko, Alexei V. Foley, Ryan J. Franckowiak, Anna Gomboc, Andreja Gompertz, Benjamin P. Guy, Leanne P. Hazra, Nandini Hernandez, Christopher Hosseinzadeh, Griffin Hussaini, Maryam Ibrahimzade, Dina Izzo, Luca Jones, R. Lynne Kang, Yijung Kasliwal, Mansi M. Knight, Matthew Kunnumkai, Keerthi Lamb, Gavin P. LeBaron, Natalie Lejoly, Cassandra Levan, Andrew J. MacBride, Sean Mallia, Franco Malz, Alex I. Miller, Adam A. Mora, John Carlos Narayan, Gautham Nayana, A.J. Nicholl, Matt Nichols, Tiffany Oates, S.R. Panayada, Akshay Ragosta, Fabio Ribeiro, Tiago Ryczanowski, Dan Sarin, Nikhil Schwamb, Megan E. Sears, Huei Seligman, Darryl Z. Sharma, Ritwik Shrestha, Manisha Kaur, Simran Stroh, Michael C. Terreran, Giacomo Thakur, Aishwarya Linesh Trivedi, Aum Tyson, J. Anthony Utsumi, Yousuke Verma, Aprajita Villar, V. Ashley Volk, Kathryn Vyas, Meet J. Wasserman, Amanda R. Wheeler, J. Craig Yoachim, Peter Zegarelli, Angela Bianco, Federica Department of Physics and Astronomy University of North Carolina at Chapel Hill Chapel HillNC27599-3255 United States Joint Space-Science Institute University of Maryland College ParkMD20742 United States Department of Astronomy University of Maryland College ParkMD20742 United States Astrophysics Science Division NASA Goddard Space Flight Center Mail Code 661 GreenbeltMD20771 United States Department of Astronomy University of California BerkeleyCA94720 United States Department of Physics University of California 366 Physics North MC 7300 BerkeleyCA94720 United States Brookhaven National Laboratory Bldg 510 UptonNY11973 United States Vera C. Rubin Observatory NSF NOIRLab 950 N Cherry Ave. TucsonAZ85749 United States Department of Astronomy the DiRAC Institute University of Washington SeattleWA United States Las Cumbres Observatory 6740 Cortona Drive Ste 102 GoletaCA93117 United States McWilliams Center for Cosmology and Astrophysics Department of Physics Carnegie Mellon University PittsburghPA15213 United States I-00078 Italy Department of Physics University of Oxford Keble Road OxfordOX1 3RH United Kingdom Astrophysics Research Centre School of Mathematics and Physics Queen's University BelfastBT7 1NN United Kingdom School of Physics and Astronomy University of Birmingham BirminghamB15 2TT United Kingdom Division of Physics Mathematics and Astronomy California Institute of Technology PasadenaCA91125 United States Department of Physics Stanford University 382 Via Pueblo Mall StanfordCA94305 United States Kavli Institute for Particle Astrophysics & Cosmology Stanford University P. O. Box 2450 StanfordCA94305 United States SLAC National Accelerator Laboratory Stanford University 2575 Sand Hill Road Menlo ParkCA94025 United States OzGrav School of Physics The University of Melbourne ParkvilleVIC3010 Australia Department of Astronomy and Astrophysics University of California Santa CruzCA95064 United States S

The Legacy Survey of Space and Time (LSST) at Vera C. Rubin Observatory isplanned to begin in the Fall of 2025. The LSST survey cadence has been designedvia a community-driven process regulated by the Survey Cadence OptimizationCommittee (SCOC), which recommended up to 3% of the observing time to carry outTarget of Opportunity (ToO) observations. Experts from the scientificcommunity, Rubin Observatory personnel, and members of the SCOC were broughttogether to deliver a recommendation for the implementation of the ToO programduring a workshop held in March 2024. Four main science cases were identified:gravitational wave multi-messenger astronomy, high energy neutrinos, Galacticsupernovae, and small potentially hazardous asteroids possible *** science cases were identified and briefly addressed in thedocuments, including lensed or poorly localized gamma-ray bursts and twilightdiscoveries. Trigger prioritization, automated response, and detailedstrategies were discussed for each science case. This document represents theoutcome of the Rubin ToO 2024 workshop, with additional contributions frommembers of the Rubin science Collaborations. The implementation of theselection criteria and strategies presented in this document has been endorsedin the SCOC Phase 3 Recommendations document (PSTN-056). Although the ToOprogram is still to be finalized, this document serves as a baseline plan forToO observations with the Rubin Observatory. Copyright © 2024, The Authors. All rights reserved.

关键词： Gravitational effects

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Corrigendum to "miR-29a-3p-dependent COL3A1 and COL5A1 expression reduction assists sulforaphane to inhibit gastric cancer progression" [Biochem. Pharmacol. 188 (2021) 114539]

引用

Biochemical pharmacology 2023年 208卷 115389页

作者： Sichong Han Zhe Wang Jining Liu Hui-Min David Wang Qipeng Yuan State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 PR China. Graduate Institute of Biomedical Engineering National Chung Hsing University Taichung City 402 Taiwan Department of Medical Laboratory Science and Biotechnology China Medical University Taichung City 404 Taiwan Graduate Institute of Medicine College of Medicine Kaohsiung Medical University Kaohsiung City 807 Taiwan College of Food and Biological Engineering Jimei University Xiamen City 361021 Fujia Province PR China Undergraduate Program Study of Biomedical Engineering Physics Department Airlangga University Surabaya City 60115 Indonesia. Electronic address: davidw@dragon.nchu.edu.tw. State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 PR China. Electronic address: yuanqp@***.

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Unraveling the Structure Transition and Peroxidase Mimic Activity of Copper Sites over Atomically Dispersed Copper-Doped Carbonized Polymer Dots

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Angewandte Chemie 2022年第7期135卷

作者： Fucheng Gao Jian Huang Prof. Ying Ruan Prof. Hui Li Pengyu Gong Prof. Fenglong Wang Prof. Qunwei Tang Prof. Yanyan Jiang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education Shandong University Jinan 250061 P. R. China MOE Key Laboratory of Materials Physics and Chemistry Under Extraordinary Conditions School of Physical Science and Technology Northwestern Polytechnical University Xian 710129 P. R. China Institute of Carbon Neutrality College of Chemical and Biological Engineering Shandong University of Science and Technology Qingdao 266590 P. R. China

The lack of systematic structural resolution makes it difficult to build specific transition-metal-atom-doped carbonized polymer dots (TMA-doped CPDs). Herein, the structure-activity relationship between Cu atoms and CPDs was evaluated by studying the peroxidase-like properties of Glu−Cu−CPDs prepared by using copper glutamate (Glu) with a Cu−N 2 O 2 initial structure. The results showed that the Cu atoms bound to Glu−Cu−CPDs in the form of Cu−N 2 C 2 , indicating that Cu−O bonds changed into Cu−C bonds under hydrothermal conditions. This phenomenon was also observed in other copper-doped CPDs. Moreover, the carboxyl and amino groups content decreased after copper-atom doping. Theoretical calculations revealed a dual-site catalytic mechanism for catalyzing H 2 O 2 . The detection of intracellular H 2 O 2 suggested their application prospects. Our study provides an in-depth understanding of the formation and catalytic mechanism of TMA-doped-CPDs, allowing for the generation specific TMA-doped-CPDs.

关键词： Atomically Dispersed Copper Atoms Carbonized Polymer Dots Coordination Environment H2O2 Detection Single-Atom Nanozymes

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Single Atoms of Iron on MoS2 Nanosheets for N2 Electroreduction into Ammonia

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Angewandte Chemie 2020年第46期132卷

作者： Su H. Chen L. Chen Y. Si R. Wu Y. Wu X. Geng Z. Zhang W. Zeng J. Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes Department of Chemical Physics University of Science and Technology of China Hefei Anhui 230026 China Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Materials for Energy Conversion and Synergetic Innovation Centre of Quantum Information & Quantum Physics University of Science and Technology of China Hefei Anhui 230026 China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201210 China

Efforts have been devoted to achieving a highly efficient artificial synthesis of ammonia (NH3). Reported herein is a novel Fe-MoS2 catalyst with Fe atomically dispersed onto MoS2 nanosheets, imitating natural nitrogenase, to boost N2 electroreduction into NH3 at room temperature. The Fe-MoS2 nanosheets exhibited a faradic efficiency of 18.8 % with a yield rate of 8.63 μg (Formula presented.) mgcat.−1 h−1 for NH3 at −0.3 V versus the reversible hydrogen electrode. The mechanism study revealed that the electroreduction of N2 was promoted and the competing hydrogen evolution reaction was suppressed by decorating the edge sites of S in MoS2 with the atomically dispersed Fe, resulting in high catalytic performance for the electroreduction of N2 into NH3. This work provides new ideas for the design of catalysts for N2 electroreduction and strengthens the understanding about N2 activation over Mo-based catalysts. © 2020 Wiley-VCH GmbH

关键词： ammonia electrochemistry heterogeneous catalysis iron nanostructures

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CsPb(I_(x)Br_(1-x))_(3) solar cells

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science Bulletin 2019年第20期64卷 1532-1539页

作者： Xue Jia Chuantian Zuo Shuxia Tao Kuan Sun Yixin Zhao Shangfeng Yang Ming Cheng Mingkui Wang Yongbo Yuan Junliang Yang Feng Gao Guichuan Xing Zhanhua Wei Lijun Zhang Hin-Lap Yip Mingzhen Liu Qing Shen Longwei Yin Liyuan Han Shengzhong Liu Lianzhou Wang Jingshan Luo Hairen Tan Zhiwen Jin Liming Ding Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing100190China University of Chinese Academy of Sciences Beijing100049China CSIRO Manufacturing Bag10Clayton SouthVictoria3169Australia Center for Computational Energy Research Department of Applied PhysicsEindhoven University of Technology5600MB EindhovenThe Netherlands MOE Key Laboratory of Low-grade Energy Utilization Technologies and Systems Chongqing UniversityChongqing400044China School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai200240China Department of Materials Science and Engineering University of Science and Technology of ChinaHefei230026China Institute for Energy Research Jiangsu UniversityZhenjiang212013China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan430074China School of Physics and Electronics Central South UniversityChangsha410083China Department of Physics Chemistry and BiologyLinkoping UniversitySE-58183 LinkopingSweden Institute of Applied Physics and Materials Engineering University of MacaoMacao999078China College of Materials Science&Engineering Huaqiao UniversityXiamen361021China College of Materials Science and Engineering Jilin UniversityChangchun130012China State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou510640China Center for Applied Chemistry School of Materials and EnergyUniversity of Electronic Science and Technology of ChinaChengdu611731China Faculty of Informatics and Engineering The University of Electro-CommunicationsTokyo182-8585Japan School of Materials Science and Engineering Shandong UniversityJinan250061China State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Normal UniversityXi’an710119China

Owing to its nice performance, low cost, and simple solution-processing, organic-inorganic hybrid perovskite solar cell(PSC) becomes a promising candidate for next-generation high-efficiency solar *** power conversion efficiency(PCE) has boosted from 3.8% to 25.2% over the past ten years. Despite the rapid progress in PCE, the device stability is a key issue that impedes the commercialization of PSCs. Recently, all-inorganic cesium lead halide perovskites have attracted much attention due to their better stability compared with their organic-inorganic counterpart. In this progress report, we summarize the properties of CsPb(IxBr1-x)3 and their applications in solar cells. The current challenges and corresponding solutions are discussed. Finally, we share our perspectives on CsPb(IxBr1-x)3 solar cells and outline possible directions to further improve the device performance.

关键词： Perovskite solar cells Cesium lead halide perovskites Power conversion efficiency Stability

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