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Frontispiz: One-Step Approach for Constructing High-Density Single-Atom Catalysts toward Overall Water Splitting at Industrial Current Densities

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Angewandte Chemie 2023年第9期135卷

作者： Dr. Dong Cao Dr. Zhirong Zhang Yahui Cui Runhao Zhang Prof. Lipeng Zhang Prof. Jie Zeng Prof. Daojian Cheng State Key Laboratory of Organic-Inorganic Composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 P. R. China School of Chemistry & Chemical Engineering Anhui University of Technology Ma'anshan Anhui 243002 P. R. China Hefei National Laboratory for Physical Sciences at the Microscale Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences 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 P. R. China

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Study on the compatibility of modified cyanate ester resin in liquid oxygen

SPE Polymers

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SPE Polymers 2020年第1期1卷 45-54页

作者： Fu, Gang Jiao, Weicheng Wang, Guan Gao, Tanling Wu, Jianwei Shao, Nan Wei, Yun Zhao Kuang, Hong He, Xiaodong Wang, Rongguo Institute of Petrochemistry Heilongjiang Academy of Sciences Heilongjiang Harbin China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Heilongjiang Harbin China Institute of Advanced Marine Materials Key Laboratory of Superlight Materials & Surface Technology Ministry of Education College of Materials Science and Chemical Engineering Harbin Engineering University Heilongjiang Harbin China

A cyanate ester (CE) resin co-modified with epoxy (EP) and bismaleimide (BMI) as the continuous phase, and phenolphthalein poly (ether sulfone) (PES-C) as the dispersed phase were used for developing liquid oxygen (LOX) composite tanks. Gaseous oxygen (GOX) anti-oxidation, LOX impact sensitivity, ductility, and cycle durability is a critical index for materials in LOX applications. Added components significantly improved material ductility at low temperature versus neat CE resin because of microstructure changes. However, improvement in thermal resistance was not achieved without tradeoffs;the addition of BMI improved thermal resistance but decreased durability. The failure mechanism of a tank containing GOX was related to reaction with oxygen. LOX impact sensitivity (IRS) is associated with anti-oxidation and flaming retardance of the samples. Micro-domains tended to separate from the continuous phase more during the LOX impact test versus the GOX test and was accompanied by increasing ductility and anti-oxidation. Cycle durability was affected more by the difference in coefficient of thermal expansion between the continuous and PES-C phases rather than immersion time. In summary, CE resin (CYEP6BM5) co-modified with PES-C, EP, and BMI showed good LOX compatibility including IRS value of 2%, 19 cycles durability, and flaming retardance of UL94V0 and may be applied for LOX composite tanks. © 2020 The Authors. SPE Polymers published by Wiley Periodicals LLC on behalf of Society of Plastics Engineers.

关键词： anti-oxidation cyanate ester low temperature cycles LOX compatibility toughening

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A General Strategy Based on Hetero-Charge Coupling Effect for Constructing Single-Atom Sites

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Angewandte Chemie 2024年第36期136卷

作者： Cheng Peng Mingyue Wang Sha Li Xuezhi Zeng Jieyue Wang Wenhai Wang Zhirong Zhang Mingfu Ye Xianwen Wei Konglin Wu Kui Zhang Jie Zeng Institute of Clean Energy and Advanced Nanocatalysis (iClean) School of Chemistry and Chemical Engineering Anhui University of Technology Ma'anshan Anhui 243032 P. R. China Chemistry and Chemical Engineering of Guangdong Laboratory Shantou Guangdong 515063 P. R. China Hefei National Research Center for Physical Sciences at the Microscale Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences 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 P. R. China School of Chemistry and Chemical Engineering Anhui University of Technology Ma'anshan Anhui 243032 P. R. China

Single-atom catalysts have emerged as cutting-edge hotspots in the field of material science owing to their excellent catalytic performance brought about by well-defined metal single-atom sites (M SASs). However, huge challenges still lie in achieving the rational design and precise synthesis of M SASs. Herein, we report a novel synthesis strategy based on the hetero-charge coupling effect (HCCE) to prepare M SASs loaded on N and S co-doped porous carbon (M 1 /NSC). The proposed strategy was widely applied to prepare 17 types of M 1 /NSC composed of single or multi-metal with the integrated regulation of the coordination environment and electronic structure, exhibiting good universality and flexible adjustability. Furthermore, this strategy provided a low-cost method of efficiently synthesizing M 1 /NSC with high yields, that can produce more than 50 g catalyst at one time, which is key to large-scale production. Among various as-prepared unary M 1 /NSC (M can be Fe, Co, Ni, V, Cr, Mn, Mo, Pd, W, Re, Ir, Pt, or Bi) catalysts, Fe 1 /NSC delivered excellent performance for electrocatalytic nitrate reduction to NH 3 with high NH 3 Faradaic efficiency of 86.6 % and high NH 3 yield rate of 1.50 mg h −1 mg cat. −1 at −0.6 V vs. RHE. Even using Fe 1 /NSC as a cathode in a Zn-nitrate battery, it exhibited a high open circuit voltage of 1.756 V and high energy density of 4.42 mW cm −2 with good cycling stability.

关键词： Single-atom catalyst General synthesis Hetero-charge coupling effect Precise preparation Electrocatalytic nitrate reduction

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Spin-induced orbital frustration in a hexagonal optical lattice

arXiv

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arXiv 2021年

作者： Li, Yongqiang Yuan, Jianmin Zhou, Xiaoji Li, Xiaopeng Department of Physics National University of Defense Technology Changsha410073 China Department of Physics Graduate School of China Academy of Engineering Physics Beijing100193 China State Key Laboratory of Advanced Optical Communication System and Network Department of Electronics Peking University Beijing100871 China State Key Laboratory of Surface Physics Institute of Nanoelectronics and Quantum Computing Department of Physics Fudan University Shanghai200438 China Shanghai Qi Zhi Institute AI Tower Xuhui District Shanghai200232 China

Complex lattices provide a versatile ground for fascinating quantum many-body physics. Here, we propose an exotic mechanics for generating orbital frustration in hexagonal lattices. We study two-component (pseudospin-1/2) Bose gases in p-orbital bands of two-dimensional hexagonal lattices, and find that the system exhibits previously untouched orbital frustration as a result of the interplay of spin and orbital degrees of freedom, in contrast to normal Ising-type orbital ordering of spinless porbital band bosons in two-dimensional hexagonal lattices. Based on the classification by symmetry analysis, we find the interplay of orbital frustration and strong interaction leads to exotic Mott and superfluid phases with spin-orbital intertwined orders, in spite of the complete absence of spin-orbital interaction in the Hamiltonian. Our study implies many-body correlations in a multi-orbital setting could induce rich spin-orbital intertwined physics in complex lattice structures. Copyright © 2021, The Authors. All rights reserved.

关键词： Bosons

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Interfacial engineering for Efficient Low-Temperature Flexible Perovskite Solar Cells

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Angewandte Chemie 2023年第41期135卷

作者： Weilun Cai Tinghuan Yang Chou Liu Yajie Wang Shiqiang Wang Yachao Du Nan Wu Wenliang Huang Shumei Wang Zhichao Wang Xin Chen Jiangshan Feng Guangtao Zhao Zicheng Ding Xu Pan Pengchen Zou Jianxi Yao Shengzhong (Frank) Liu Kui Zhao Key Laboratory of Applied Surface and Colloid Chemistry National Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China Contribution: Writing - original draft (lead) Key Laboratory of Novel Thin-Film Solar Cells Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China Shaanxi State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources Beijing Key Laboratory of Energy Safety and Clean Utilization North China Electric Power University Beijing 102206 P. R. China Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

Photovoltaic technology with low weight, high specific power in cold environments, and compatibility with flexible fabrication is highly desired for near-space vehicles and polar region applications. Herein, we demonstrate efficient low-temperature flexible perovskite solar cells by improving the interfacial contact between electron-transport layer (ETL) and perovskite layer. We find that the adsorbed oxygen active sites and oxygen vacancies of flexible tin oxide (SnO 2 ) ETL layer can be effectively decreased by incorporating a trace amount of titanium tetrachloride (TiCl 4 ). The effective defects elimination at the interfacial increases the electron mobility of flexible SnO 2 layer, regulates band alignment at the perovskite/SnO 2 interface, induces larger perovskite crystal growth, and improves charge collection efficiency in a complete solar cell. Correspondingly, the improved interfacial contact transforms into high-performance solar cells under one-sun illumination (AM 1.5G) with efficiencies up to 23.7 % at 218 K, which might open up a new era of application of this emerging flexible photovoltaic technology to low-temperature environments such as near-space and polar regions.

关键词： Flexible Interfacial engineering Low Temperature Perovskite Solar Cells

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Hydrazide Derivatives for Defect Passivation in Pure CsPbI3Perovskite Solar Cells

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Angewandte Chemie 2022年第33期134卷

作者： Yuhang Che Prof. Zhike Liu Dr. Yuwei Duan Jungang Wang Shaomin Yang Dongfang Xu Prof. Wanchun Xiang Prof. Tao Wang Prof. Ningyi Yuan Prof. Jianning Ding Prof. Shengzhong (Frank) Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology School of Materials Science and Engineering Changzhou University Changzhou 213164 China Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

All-inorganic CsPbI 3 perovskite presents preeminent chemical stability and a desirable band gap as the front absorber for perovskite/silicon tandem solar cells. Unfortunately, CsPbI 3 perovskite solar cells (PSCs) still show low efficiency due to high density of defects in solution-prepared CsPbI 3 films. Herein, three kinds of hydrazide derivatives (benzoyl hydrazine (BH), formohydrazide (FH) and benzamide (BA)) are designed to reduce the defect density and stabilize the phase of CsPbI 3 . Calculation and characterization results corroborate that the carboxyl and hydrazine groups in BH form strong chemical bonds with Pb 2+ ions, resulting in synergetic double coordination. In addition, the hydrazine group in the BH also forms a hydrogen bond with iodine to assist the coordination. Consequently, a high efficiency of 20.47 % is achieved, which is the highest PCE among all pure CsPbI 3 -based PSCs reported to date. In addition, an unencapsulated device showed excellent stability in ambient air.

关键词： CsPbI3 Defect Passivation Hydrazide Perovskite Solar Cells

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Proton Intercalation/De-intercalation Chemistry in Phenazine-based Anode for Hydronium-ion Batteries

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Angewandte Chemie 2023年第47期135卷

作者： Dr. Yuanyuan Ma Yuan Wei Wenjuan Han Yuhao Tong AJing Song Jianhua Zhang Prof. Hongbao Li Prof. Xifei Li Prof. Jianping Yang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai 201620 P. R. China Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials Xi'an Key Laboratory of New Energy Materials and Devices Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering Xi'an University of Technology Xi'an 710048 P. R. China Institutes of Physical Science and Information Technology Key Laboratory of Structure and Functional Regulation of Hybrid Material (Ministry of Education) Anhui University Hefei 230601 P. R. China

Hydronium-ion batteries have received significant attention owing to the merits of extraordinary sustainability and excellent rate abilities. However, achieving high-performance hydronium-ion batteries remains a challenge due to the inferior properties of anode materials in strong acid electrolyte. Herein, a hydronium-ion battery is constructed which is based on a diquinoxalino [2,3-a:2’,3’-c] phenazine (HATN) anode and a MnO 2 @graphite felt cathode in a hybrid acidic electrolyte. The fast kinetics of hydronium-ion insertion/extraction into HATN electrode endows the HATN//MnO 2 @GF battery with enhanced electrochemical performance. This battery exhibits an excellent rate performance (266 mAh g −1 at 0.5 A g −1 , 97 mAh g −1 at 50 A g −1 ), attractive energy density (182.1 Wh kg −1 ) and power density (31.2 kW kg −1 ), along with long-term cycle stability. These results shed light on the development of advanced hydronium-ion batteries.

关键词： Aqueous Battery High Power Density Hydronium Storage Hydronium-Ion Battery Phenazine-Based Electrode

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ZnO Interface Modified LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)Toward Boosting Lithium Storage

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Energy & Environmental Materials 2020年第4期3卷 522-528页

作者： Yunyan Li Xifei Li Junhua Hu Wen Liu Hirbod Maleki Kheimeh Sari Dejun Li Qian Sun Liang Kou Zhanyuan Tian Le Shao Cheng Zhang Jiujun Zhang Xueliang Sun Tianjin International Joint Research Center of Surface Technology for Energy Storage Materials Energy&Materials Engineering CenterCollege of Physics and Materials ScienceTianjin Normal UniversityTianjin 300387China Xi’an Key Laboratory of New Energy Materials and Devices Institute of Advanced Electrochemical Energy&School of Materials Science and EngineeringXi’an University of TechnologyXi’an 710048Shaanxi China State Center for International Cooperation on Designer Low-carbon&Environmental Materials(CDLCEM) Zhengzhou University100 Kexue AvenueZhengzhou 450001China Department of Mechanical and Materials Engineering University of Western OntarioLondonOntario N6A 5B9Canada Shaanxi Coal Chem Ind Technol Res Inst Co Ltd Xian Shaanxi 710070China Department of Chemistry College of Sciences/Institute for Sustainable EnergyShanghai UniversityShanghai 200444China

In this work,an amorphous ZnO was coated on LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)(NCM)using a sol-gel strategy *** NCM coated with 1 wt.%Zn O and a thickness of about 3 nm exhibits an improved cycling performance,accompanied by a lower capacity fading(from 194.8 to 133.8 m Ah g^(-1),i.e.,68%)than that of the pristine one(i.e.,only 34%)after 300 cycles at 0.2 *** cyclic voltammetry(CV)and electrochemical impedance spectroscopy(EIS)indicate that the Zn O coating can improve extraction/insertion of Li+and inhibit the increase in impedance of the NCM cathode *** approach may benefit the performance improvement of the Ni-rich cathode materials in Lithium-ion batteries(LIBs).

关键词： cathode materials LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2) lithium-ion batteries ZnO coating

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Quantum phase transitions and superconductivity in the pressurized heavy-fermion compound CeCuP2

arXiv

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arXiv 2021年

作者： Cheng, Erjian Zhu, Chuchu Ying, Tianping Xu, Yuanji Peets, Darren C. Ni, Jiamin Pan, Binglin Huang, Yeyu Wang, Linshu Yang, Yi-Feng Li, Shiyan State Key Laboratory of Surface Physics Department of Physics Fudan University Shanghai200438 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo Zhejiang315201 China Collaborative Innovation Center of Advanced Microstructures Nanjing210093 China Shanghai Research Center for Quantum Sciences Shanghai201315 China

The tilted balance among competing interactions can yield a rich variety of ground states of quantum matter. In most Ce-based heavy fermion systems, this can often be qualitatively described by the famous Doniach phase diagram, owing to the competition between the Kondo screening and the Ruderman-Kittel-Kasuya-Yoshida exchange interaction. Here, we report an unusual pressure-temperature phase diagram beyond the Doniach one in CeCuP2. At ambient pressure, CeCuP2 displays typical heavy-fermion behavior, albeit with a very low carrier density. With lowering temperature, it shows a crossover from a non-Fermi liquid to a Fermi liquid at around 2.4 K. But surprisingly, the Kondo coherence temperature decreases with increasing pressure, opposite to that in most Ce-based heavy fermion compounds. Upon further compression, two superconducting phases are revealed. At 48.0 GPa, the transition temperature reaches 6.1 K, the highest among all Ce-based heavy fermion superconductors. We argue for possible roles of valence tuning and fluctuations associated with its special crystal structure in addition to the hybridization effect. These unusual phase diagrams suggest that CeCuP2 is a novel platform for studying the rich heavy fermions physics beyond the conventional Doniach paradigm. © 2021, CC BY.

关键词： Phase diagrams

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Aluminate/Co Composite Absorbing Materials Developing for Elevated-Temperature and High-Efficiency Electromagnetic Absorbing (EMA) Materials

SSRN

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SSRN 2025年

作者： Guan, Zhen-Jie Yang, Bo-An Yuan, Yong Jiang, Jian-Tang Li, Yang Song, Bo Sun, Xue-Yin Gong, Yuan-Xun Yan, Shao-Jiu Shao, Wen-Zhu Zhen, Liang School of Materials Science and Engineering Harbin Institute of Technology Harbin150001 China School of Materials and Metallurgy University of Science and Technology Liaoning Liaoning 114051 China Shanghai Aerospace Precision Machinery Research Institute Shanghai201109 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China Aerospace Research Institute of Special Material and Processing Technology Beijing100074 China Beijing Institute of Aeronautical Materials Beijing100095 China Nanjing University of Aeronautics and Astronautics Nanjing210016 China

For the design requirements of structural/functional integrated components, it is increasingly urgent to find EMA materials that combine high-efficiency EMA performances with load-bearing capacity. Herein, aluminate/Co composite absorbing materials were prepared through mechanical mixing combined with a hydration hardening process. The microstructures of the composite specimens were controlled by adjusting the shape of Co particles, and cordierite particles were added to further regulate the distribution of Co particles. Compared to spherical Co particles, flake-shaped Co particles exhibit superior electromagnetic parameters. However, the excessively high conductivity of Co flakes filled specimen leads to a significant degradation in their impedance matching, resulting in a rapid attenuation of the electromagnetic performances. The temperature-dependent ionic conductivity plays an important role in controlling the elevated-temperature conductivity and can be suppressed by adding a second dielectric component. For a 2 mm composite specimen, the maximum reflection loss (RLmax) reaches -13.1 dB, and the effective absorption bandwidth (RL © 2025, The Authors. All rights reserved.

关键词： Composite coatings

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