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Perovskite Sr_(0.9)Fe_(0.9)Zr_(0.1)O_(3-delta)：Redox-stable Structure, Oxygen Vacancy, Electrical Properties and Steam Electrolysis Performance

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结构化学 2018年第1期 65-74页

作者： Li Zhe Ye Lingting Xie Kui CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences

Many researchers have studied on perovskite oxide for its unique *** oxides,ABO3-δ,with different A and B metals have shown wide applications in many fields,in particular solid oxide ***3-δ,typical perovskite oxides,in which iron is the mixed-valence cation with the capacity to change the chemical valence,have a wide range of oxygen *** this study,Sr0.9Fe0.9Zr0.1O3-δ（SFZO） is synthesized and then treated in 5%H2/Ar and air at high temperature,exhibiting excellent redox ***-stable structure,oxygen vacancy and electrical properties of SFZO are *** electrolysis is then performed with SFZO cathode under 5%H2O/5%H2/Ar and 5%H2O/Ar atmospheres,*** present results indicate that the SFZO is a novel promising cathode material for solid oxide steam electrolyser.

关键词： phase structure solid oxide electrolyser Sr0.9Fe0.9Zr0.1O3-δ cathode steam electrolysis

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Wide-field decodable orthogonal fingerprints of single nanoparticles unlock multiplexed digital assays

arXiv

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arXiv 2020年

作者： Liao, Jiayan Zhou, Jiajia Song, Yiliao Liu, Baolei Chen, Yinghui Wang, Fan Chen, Chaohao Lin, Jun Chen, Xueyuan Lu, Jie Jin, Dayong Faculty of Science University of Technology Sydney NSW2007 Australia Centre for Artificial Intelligence Faculty of Engineering and IT University of Technology Sydney NSW2007 Australia State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun130022 China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences FuzhouFujian350002 China UTS-SUStech Joint Research Centre for Biomedical Materials & Devices Department of Biomedical Engineering Southern University of Science and Technology Shenzhen China

The control in optical uniformity of single nanoparticles and tuning their diversity in orthogonal dimensions, dot to dot, holds the key to unlock nanoscience and applications. Here we report that the time-domain emissive profile from single upconversion nanoparticle, including the rising, decay and peak moment of the excited state population (2 profile), can be arbitrarily tuned by upconversion schemes, including interfacial energy migration, concentration dependency, energy transfer, and isolation of surface quenchers. This allows us to significantly increase the coding capacity at the nanoscale. We exemplify that at least three orthogonal dimensions, including the excitation wavelength, emission colour and 2 profiles, can be built into the nanoscale derivative 2-Dots. We further implement both time-resolved wide-field imaging and deep-learning techniques to decode these fingerprints, showing high accuracies at high throughput. This work reveals a vast library of individually preselectable nano-tags, and our ability for controlling the uniformity and diversity "at the bottom". These high-dimensional optical fingerprints provide a new horizon for applications spanning from sub-diffraction-limit data storage, security inks, to high-throughput single-molecule digital assays and super-resolution imaging. © 2020, CC-BY.

关键词： Excited states

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Rücktitelbild: Ultra-Small Air-Stable Triplet-Triplet Annihilation Upconversion Nanoparticles for Anti-Stokes Time-Resolved Imaging (Angew. Chem. 47/2023)

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Angewandte Chemie 2023年第47期135卷

作者： Dr. Bolong Zhang Dr. Kieran D. Richards Beatrice E. Jones Abigail R. Collins Rosie Sanders Dr. Sarah R. Needham Dr. Pu Qian Amoghavarsha Mahadevegowda Prof. Caterina Ducati Prof. Stanley W. Botchway Prof. Rachel C. Evans Department of Materials Science and Metallurgy University of Cambridge 27 Charles Babbage Road Cambridge CB3 0FS UK CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China Diamond Light Source Didcot Oxfordshire OX11 0QX UK Central Laser Facility Science and Technology Facilities Council Rutherford Appleton Laboratory Harwell Science and Innovation Campus Oxfordshire OX11 0QX UK Materials and Structural Analysis Thermo Fisher Scientific Achtseweg Noord 5 5651 GG Eindhoven The Netherlands The Faraday Institution Quad One Harwell Science and Innovation Campus Didcot UK

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Dually-Passivated Perovskite Solar Cells with Reduced Voltage Loss and Increased Super Oxide Resistance

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Angewandte Chemie 2021年第15期133卷

作者： Qin Zhou Yifeng Gao Chunsheng Cai Zhuangzhuang Zhang Jianbin Xu Prof. Zhongyi Yuan Prof. Dr. Peng Gao CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China Laboratory for Advanced Functional Materials Xiamen Institute of Rare Earth Materials Haixi Institute Chinese Academy of Sciences Xiamen 361021 China University of Chinese Academy of Sciences Beijing 100049 China Institute of Polymers and Energy Chemistry (IPEC) College of Chemistry Nanchang University 999 Xuefu Avenue Nanchang 330031 China

In recent years, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has witnessed rapid progress. Nevertheless, the pervasive defects prone to non-radiative recombination and decomposition exist at the surface and the grain boundaries (GBs) of the polycrystalline perovskite films. Herein, we report a comprehensive dual-passivation (DP) strategy to effectively passivate the defects at both surface and GBs to enhance device performance and stability further. Firstly, a fluorinated perylene-tetracarboxylic diimide derivative is permeated in the perovskite metaphase during antisolvent treatment, and then a fluorinated bulky aromatic ammonium salt is introduced over the annealed perovskite. The reduction of defect density can be unambiguously proved by the superoxide species generation/quenching reaction. As a result, optimized planar PSCs demonstrate a decreased open-circuit voltages deficit from 0.47 to 0.39 V and the best efficiency of 23.80 % from photocurrent scanning with a stabilized maximum power output efficiency of 22.99 %. Without encapsulation, one typical device can maintain over 85 % of the initial efficiency after heating on a hot plate at 100 °C for 30 h under relative humidity (RH) of 70 %. When the device is aged under 30±5 % RH, over 97 % of its initial PCE is retained after 1700 h.

关键词： defects dual-passivation perovskite solar cells stability superoxide

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Back Cover: Ultra-Small Air-Stable Triplet-Triplet Annihilation Upconversion Nanoparticles for Anti-Stokes Time-Resolved Imaging (Angew. Chem. Int. Ed. 47/2023)

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Angewandte Chemie International Edition 2023年第47期62卷

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Facile preparation of Ce enhanced vinyl-functionalized silica aerogel-like monoliths for selective separation of radioactive thorium from monazite

Facile preparation of Ce enhanced vinyl-functionalized silic...

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稀土元素镧铈钇应用研究研讨会暨广东省稀土产业技术联盟成立大会

作者： Hao Zhang Fan Yang Ruixi Bai Zhigang Zhao Chunqing Cai Jianguo Li Ying Ma CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Xiamen Institute of Rare Earth Materials Haixi Institute Chinese Academy of Sciences University of Chinese Academy of Sciences Baotou Research Institute of Rare Earths

Thorium(Th) is an associated ore of rare earth metals that is radioactive and harmful to the environment, but it is also a potential nuclear fuel replacement for uranium. The separation of Th from rare earth elements(REEs) is of great importance in environmental governance and clean-energy development. In this work, a monolithic cerium(Ce) doped silica aerogel-like with flexibility was synthesized using a low consumption and rapid technique, and it was used in a continuous solid-phase extraction as an adsorbent for the selective separation of Th/REEs. The batch adsorption experiments showed that the adsorption efficiency of Th(IV) can be up to 96% when abnormally high levels of metal ions(20 ppm) exist. Under the same conditions, the adsorption efficiency of REEs is at a near-zero level, which demonstrates the great selective separation of Th/REEs for the aerogel-like. The results also indicated that Th(IV) could desorb from the adsorbent in weak acidic media, which is friendly to the environment. Therefore, the material has application prospects for the separation of Th/REEs and removal of radioactive contamination from the environment.

关键词： silica aerogel-like monoliths selective adsorption rare earth thorium monazite

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Ultra-Small Air-Stable Triplet-Triplet Annihilation Upconversion Nanoparticles for Anti-Stokes Time-Resolved Imaging

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Angewandte Chemie 2023年第47期135卷

Image contrast is often limited by background autofluorescence in steady-state bioimaging microscopy. Upconversion bioimaging can overcome this by shifting the emission lifetime and wavelength beyond the autofluorescence window. Here we demonstrate the first example of triplet-triplet annihilation upconversion (TTA-UC) based lifetime imaging microscopy. A new class of ultra-small nanoparticle (NP) probes based on TTA-UC chromophores encapsulated in an organic–inorganic host has been synthesised. The NPs exhibit bright UC emission (400–500 nm) in aerated aqueous media with a UC lifetime of ≈1 μs, excellent colloidal stability and little cytotoxicity. Proof-of-concept demonstration of TTA-UC lifetime imaging using these NPs shows that the long-lived anti-Stokes emission is easily discriminable from typical autofluorescence. Moreover, fluctuations in the UC lifetime can be used to map local oxygen diffusion across the subcellular structure. Our TTA-UC NPs are highly promising stains for lifetime imaging microscopy, affording excellent image contrast and potential for oxygen mapping that is ripe for further exploitation.

关键词： Fluorescence Lifetime Imaging Microscopy Nanoparticles Triplet-Triplet Annihilation Upconversion

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Corrigendum to Dissolving the high-cost with acidity: A happy encounter between fluidized struvite crystallization and wastewater from activated carbon manufacture [Water Research, 188 (2021) 116521]

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Water research 2021年 198卷 117218页

作者： Xin Ye Minquan Chen Wei Wang Junhuang Shen Junbin Wu Wei Huang Lishan Xiao Xiangyu Lin Zhi-Long Ye Shaohua Chen Key Laboratory of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China. CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Xiamen Institute of Rare Earth Materials Haixi Institute Chinese Academy of Science Xiamen 361021 China. School of Environmental and Geographical Sciences Shanghai Normal University Shanghai 200234 China.

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Boosting Electroreduction Kinetics of Nitrogen to Ammonia via Tuning Electron Distribution of Single-Atomic Iron Sites

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Angewandte Chemie 2021年第16期133卷

作者： Yan Li Junwei Li Dr. Junheng Huang Dr. Junxiang Chen Yan Kong Dr. Bin Yang Dr. Zhongjian Li Prof. Dr. Lecheng Lei Dr. Guoliang Chai Prof. Dr. Zhenhai Wen Prof. Dr. Liming Dai Prof. Dr. Yang Hou Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological Engineering Zhejiang University Hangzhou 310027 China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China Australian Carbon Materials Centre (A-CMC) School of Chemical Engineering University of New South Wales Sydney NSW 2052 Australia Institute of Zhejiang University–Quzhou Quzhou 324000 China

Electrocatalytic nitrogen reduction reaction (NRR) plays a vital role for next-generation electrochemical energy conversion technologies. However, the NRR kinetics is still limited by the sluggish hydrogenation process on noble-metal-free electrocatalyst. Herein, we report the rational design and synthesis of a hybrid catalyst with atomic iron sites anchored on a N,O-doped porous carbon (Fe SA -NO-C) matrix of an inverse opal structure, leading to a remarkably high NH 3 yield rate of 31.9 μg h −1 mg −1 cat. and Faradaic efficiency of 11.8 % at −0.4 V for NRR electrocatalysis, outperformed almost all previously reported atomically dispersed metal-nitrogen-carbon catalysts. Theoretical calculations revealed that the observed high NRR catalytic activity for the Fe SA -NO-C catalyst stemmed mainly from the optimized charge-transfer between the adjacent O and Fe atoms homogenously distributed on the porous carbon support, which could not only significantly facilitate the transportation of N 2 and ions but also effectively decrease the binding energy between the isolated Fe atom and *N 2 intermediate and the thermodynamic Gibbs free energy of the rate-determining step (*N 2 → *NNH).

关键词： Fe-N2O4 inverse opal structure kinetic enhanced catalysis N2 electroreduction single atom catalyst

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A novel multi-scale continuum electric double-layer model for electron-proton interplay at the TiO2/electrolyte interface

A novel multi-scale continuum electric double-layer model fo...

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中国化学会第二十次全国电化学大会

作者： Jie-qiong Li Lingyi Meng Jun Cheng State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials College of Chemistry and Chemical Engineering Xiamen University CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences Xiamen Institute of Rare-earth Materials Haixi Institutes Chinese Academy of Sciences

Although photoelectrochemical water oxidation has received considerable theoretical and experimental investigations[1,2], there is still a lack of studies involving the interaction between electric field and charge at the semiconductor/electrolyte interface. This interaction is crucial to determine the interfacial behaviors of photoelectrochemistry.

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