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Work-function-induced Interfacial Built-in Electric Fields in Os-OsSe2Heterostructures for Active Acidic and Alkaline Hydrogen Evolution

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Angewandte Chemie 2022年第36期134卷

作者： Ding Chen Ruihu Lu Ruohan Yu Yuhang Dai Hongyu Zhao Dulan Wu Pengyan Wang Jiawei Zhu Dr. Zonghua Pu Lei Chen Jun Yu Prof. Shichun Mu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 P. R. China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan 528200 P. R. China NRC (Nanostructure Research Centre) Wuhan University of Technology Wuhan 430070 P. R. China

Theoretical calculations unveil that the formation of Os-OsSe 2 heterostructures with neutralized work function (WF) perfectly balances the electronic state between strong (Os) and weak (OsSe 2 ) adsorbents and bidirectionally optimizes the hydrogen evolution reaction (HER) activity of Os sites, significantly reducing thermodynamic energy barrier and accelerating kinetics process. Then, heterostructural Os-OsSe 2 is constructed for the first time by a molten salt method and confirmed by in-depth structural characterization. Impressively, due to highly active sites endowed by the charge balance effect, Os-OsSe 2 exhibits ultra-low overpotentials for HER in both acidic (26 mV @ 10 mA cm −2 ) and alkaline (23 mV @ 10 mA cm −2 ) media, surpassing commercial Pt catalysts. Moreover, the solar-to-hydrogen device assembled with Os-OsSe 2 further highlights its potential application prospects. Profoundly, this special heterostructure provides a new model for rational selection of heterocomponents.

关键词： Charge Balance Effect DFT Calculation Heterostructure Engineering Hydrogen Evolution Os-Based Electrocatalyst Electrocatalysis

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Dual Ion Co-Insertion Induced Spontaneous and Reversible Phase Conversion Chemistry for Unprecedented Zn2+Storage

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Angewandte Chemie 2024年第2期137卷

作者： Xikun Zhang Junwei Zhang Dr. Haoxiang Yu Dr. Thomas L. Madanu Maoting Xia Dr. Pengcheng Xing Prof. Alexandru Vlad Prof. Jie Shu Prof. Bao-Lian Su School of Materials Science and Chemical Engineering Ningbo University 818 Fenghua road Ningbo Zhejiang 315211 China Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 rue de Bruxelles Namur B-5000 Belgium Institute of Condensed Matter and Nanosciences Molecular Chemistry Materials and Catalysis Université Catholique de Louvain Louvain-la-Neuve B-1348 Belgium State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi road Wuhan Hubei 430070 China Clare Hall University of Cambridge Cambridge CB2 1EW UK

Prussian blue analogues are highly promising electrode materials due to their versatile electrochemical activity and low cost. However, they often suffer from severe structural damage caused by the Jahn–Teller distortion and dissolution of high-spin outer metal ions, resulting in poor cycle life. Material modification and electrolyte regulation have been the common approaches to address this issue, albeit with very limited success. We report here a novel and efficient strategy to preserve structural stability by co-inserting Co 2+ and Zn 2+ ions in KCo[Fe(CN) 6 ]. This co-insertion induced a spontaneous and reversible phase conversion by the replacement of low-spin inner ion (Fe 3+ ), which efficiently relieves structural damage caused by Jahn–Teller distortion and metal-ion dissolution, leading to an outstanding Zn 2+ storage capacity and an exceptional improvement of cycle life with a capacity retention of 97.7 % over 4400 cycles at 40 C. We also demonstrated the enhancement of co-intercalation on ion migration using a combined approach of experimental and density functional theory (DFT) calculations. This work provides an important progress to solve the cycle stability of Prussian blue analogues towards their practical application as electrode materials for aqueous batteries.

关键词： Prussian blue analogues Aqueous zinc ion battery Structural damage common ion effect Phase conversion

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Controlled pore size of Pt/KIT-6 used for propane total oxidation

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Rare Metals 2018年第2期37卷 123-128页

作者： Yu-Sheng Chen Yi-Dan Cao Rui Ran Xiao-Dong Wu Duan Weng Key Laboratory of Advanced Materials of Ministry of Education School of Materials Science and EngineeringTsinghua University State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University

Mesoporous silica KIT-6 with different pore sizes was controllably synthesized by hydrothermal meth- ods. The same contents of Pt were loaded on KIT-6 sup- ports to apply for propane total oxidation. Low-angle X-ray diffraction （XRD）, nitrogen adsorption-desorption, CO chemisorption and transmission electron microscopy （TEM） were carried out to investigate the physicochemical properties of the catalysts. The results reveal that different pore sizes of KIT-6 supports could affect the Pt particle sizes on KIT-6. The mesopores on KIT-6-80 and KIT-6- 130 effectively confine the size of the inside Pt nanopar- ticles during calcining. Pt/KIT-6-80 with the appropriate pore size as well as the Pt particle size exhibits the best catalytic performance with T50 （the temperature at which hydrocarbon （HC） conversion reaches 50%） of only 237 ℃. However, Pt particles prefer dispersing on the external surface of KIT-6-40 due to those too small pores.

关键词： Mesoporous silica KIT-6 Pore size Propanetotal oxidation

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Dual-Anionic Coordination Manipulation Induces Phosphorus and Boron-Rich Gradient Interphase Towards Stable and Safe Sodium Metal Batteries

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Angewandte Chemie 2024年第3期137卷

作者： Yi-Hu Feng Dr. Mengting Liu Wenli Qi Haoliang Liu Qiang Liu Dr. Chao Yang Yongwei Tang Xu Zhu Shuai Sun Yuan-Meng Li Tian-Ling Chen Bing Xiao Prof. Xiao Ji Prof. Ya You Prof. Peng-Fei Wang Center of Nanomaterials for Renewable Energy State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical Engineering Xi'an Jiaotong University Xi'an Shaanxi 710049 P. R. China School of Optical and Electronic Information-Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan Hubei 430074 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan Hubei 430070 P. R. China Jiangsu Jufeng New Energy Technology Co. Ltd. Changzhou Jiangsu 213166 P. R. China

High-voltage sodium metal batteries (SMBs) present a viable pathway towards high-energy-density sodium-based batteries due to the competitive cost advantage and abundant supply of sodium resources. However, they still suffer from severe capacity decay induced by the notorious decomposition of the electrolyte under high voltage and unstable cathode/electrolyte interphase (CEI). In addition, the high reactivity of Na metal and flammable electrolytes push SMBs to their safety limits. Herein, a special dual-anion aggregated Na + solvation structure is designed in a nonflammable trimethyl phosphate-based localized high-concentration electrolyte, and a gradient CEI enriched with phosphorus and boron compounds is formed on the cathode. This thin and stable interphase effectively suppresses the parasitic reaction, improves the interfacial stability of the cathode, and facilitates Na + transport through the interface by the synergistic effect of multi-components, thus optimizing the cycling stability and safety of SMBs. The Na 0.95 Ni 0.4 Fe 0.15 Mn 0.3 Ti 0.15 O 2 //Na batteries employing such electrolyte provide a discharge capacity of 167.5 mAh g −1 and high retention in the capacity of 85.2 % after 800 cycles at 1 C. This approach offers a general strategy for the design of flame-retardant high-voltage electrolytes and the practical application of SMBs.

关键词： sodium metal batteries electrolyte non-flammable cathode/electrolyte interphase solvation structure

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Thermo-mechanical interaction between aluminum alloy and tools with different profiles during friction stir welding

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Transactions of Nonferrous Metals Society of China 2019年第3期29卷 495-506页

作者： Min YANG Rui-jun BAO Xiu-zhong LIU Chao-qun SONG Key Laboratory for Liquid?Solid Structural Evolution and Processing of Materials Ministry of Education Shandong University Ji’nan 250061 China State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin 150001 China

The influence of the tool profiles on the thermo-mechanical interaction between AA6061-T6 workpiece and tool during friction stir welding was investigated. A customized experimental setup was employed to measure the feature points temperature and tool spindle torque in the process of FSW. Microstructure and tensile properties of stir zone (SZ) were characterized. Results indicate that the shoulder and pin geometries were responsible for the heat generation, tool torque variation at the plunging stage as well as the cross section contour of SZ, respectively. Finer grains in SZ resulted from flutes on shoulder and grooves on pin. Flat faces on the pin resulted in inhomogeneous grain size. Weld with higher 0.2% yield strength of 173 MPa was obtained by using the cylindrical pin tool while higher elongation weld of 32.0% was produced with triflat threaded pin tool.

关键词： friction stir welding tool profile thermal cycle tool spindle torque tensile properties

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Highly stretchable strain sensors using conductive MoS 2 composited PVA-PAA-Li + hydrogels for information interaction

Transactions of Materials Research

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Transactions of materials Research 2025年第3期1卷

作者： Zhixiang Zhang Jianhua Zhou Xiaoling Ke Lili Zhao Xiaojiang Mu Yulian Chen Lida Jia Fengmei He Jie Gao Jing Liu Jun-Liang Chen Xiaoyang Wang Lei Miao Libo Yuan Guangxi Key Laboratory of Information Materials Guangxi Collaborative Innovation Center of Structure and Property for New Energy Materials School of Material Science and Engineering Guilin University of Electronic Technology Guilin 541004 China College of Optoelectronic Engineering Guilin University of Electronic Technology Guilin 541004 China Guangdong Provincial Key Laboratory of Distributed Energy Systems Dongguan University of Technology Dongguan 523808 China Guangxi Novel Battery Materials Research Center of Engineering Technology State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures School of Physical Science and Technology Guangxi University Nanning 530004 China Guangxi Key Laboratory of Optoelectronic Information Processing Guilin University of Electronic Technology Guilin 541004 China

Wearable sensors using conductive hydrogels have been widely used in advanced technologies such as artificial intelligence, information interaction, and medical monitoring. However, it remains a major challenge to strike a balance between mechanical properties and electrical conductivity. In this work, we propose and demonstrate a conductivity-enhanced strain sensor with molybdenum disulfide (MoS 2 ) compounded as a conductive filler in the hydrogel matrix. MoS 2 not only facilitates the molding of the dual-networked poly(vinyl alcohol) and poly(acrylic acid) but also provides a physical cross-linking point for the hydrogel matrix, which improves the mechanical properties of the hydrogel with tensile strains up to 780%. Upon further immersion in lithium chloride (LiCl) solution, the conductivity of the hydrogel sensors was significantly improved up to 3.88 S m −1 because the intercalation of Li + into MoS 2 induces the synergistic effect of ionic and electronic conductivity. The inherent -OH and -COOH groups in the network made the hydrogels also self-adhesive. This study provides a new approach for the development of advanced information-interaction devices, with potential applications extending to next-generation wearable electronics and responsive sensor technologies.

关键词： Strain sensors Wearable sensors Information interaction MoS 2 Conductive hydrogel

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Hydrated eutectic electrolytes for high-performance ammonium-ion batteries

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Chemical Engineering Journal 2025年 517卷

作者： Haolong Nie Zhuofan Chen Duoduo Hu Jing Wen Peng Meng Chenyang Zhang Min Yan Chaoqun Shang Pu Hu Zhiliang Huang Hubei Key Laboratory of Plasma Chemistry and Advanced Materials School of Materials Science and Engineering Wuhan Institute of Technology Wuhan 430205 PR China Hunan International Joint Research Center for Efficient and Clean Utilization of Critical Metal Mineral Resources Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-Containing Mineral Resources School of Minerals Processing and Bioengineering Central South University Changsha 410083 PR China

Ammonium-ion batteries present a promising solution for electrochemical energy storage, yet their practical application is limited by a narrow electrochemical stability window (ESW) and capacity degradation due to high H 2 O activity. This study introduces hydrogen-bond (H-bond) regulation using succinonitrile (SCN) to modify the binding state of H 2 O by forming an SCN-coordinated H-bond network that effectively suppresses ‘‘free H 2 O’’. The resulting hydrated eutectic electrolyte NH 4 OTF-SCN-H 2 O (1-5-3 molar ratio) achieves an expanded electrochemical stability window, non-flammability and a wider operational temperature range. Paired with an NH 4 -rich cathode, this system delivers an initial capacity of 62mAh g −1 with 97 % retention after 200 cycles. Furthermore, it demonstrates robust low-temperature performance and low self-discharge rates, maintaining 80 % of room-temperature capacity at −30 °C and holding an effective voltage of 0.7 V (38 % SOC) after 2000 h of rest at 100 % SOC. These findings mark a significant step toward developing cost-effective, safe and high-performance ammonium-ion battery technology.

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Forming the transverse inner rib of a curved generatrix part through power spinning

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Advances in Manufacturing 2019年第1期7卷 105-115页

作者： Hong-Rui Zhang Mei Zhan Jing Guo Xian-Xian Wang Peng-Fei Gao Fei Ma State Key Laboratory of Solidification Processing School of Materials Science and Engineering Northwestern Polytechnical University Xi'an 710072 People's Republic of China Shaanxi Key Laboratory of High-Performance Precision Forming Technology and Equipment School of Materials Science and Engineering Northwestern Polytechnical University Xi'an 710072 People's Republic of China Long March Machinery Factory China Aerospace Science and Technology Corporation Chengdu 610100 People's Republic of China

How to form high-quality transverse inner ribs through power spinning is a key issue for complicated integrated curved generatrix parts with transverse inner ribs. In this study, the forming characteristics and laws during the power spinning process were investigated using a finite element simulation based on the orthogonal design method. The results show that the transverse inner rib distributes homogeneously along the circumferential direction but inhomogeneously along the generatrix direction. Depressions occur easily in the middle zone of the rib (MZR). The roller nose radius is the most significant parameter of the MZR underfill degree. A larger roller nose radius is helpful to decrease the MZR underfill degree. Furthermore, the preformed billet thickness also plays a vital role in the underfill degree of the front zone of the rib and the back zone of the rib, as well as the depression degree of the outer surface of the rib. By combining the ribfilling characteristics and laws, the optimized forming process window for obtaining high-quality inner ribs was obtained by regression analysis, thus laying a basis for improving the forming quality of curved generatrix parts with transverse inner ribs in power spinning.

关键词： Power spinning Transverse inner rib Rib filling Process optimization

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A Bifunctional CdS/MoO2/MoS2Catalyst Enhances Photocatalytic H2Evolution and Pyruvic Acid synthesis

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Angewandte Chemie 2022年第44期134卷

作者： Dr. Chuanbiao Bie Dr. Bicheng Zhu Dr. Linxi Wang Prof. Huogen Yu Dr. Chenhui Jiang Prof. Tao Chen Prof. Jiaguo Yu Laboratory of Solar Fuel Faculty of Materials Science and Chemistry China University of Geosciences 430074 Wuhan P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 430070 Wuhan P. R. China Hefei National Laboratory for Physical Sciences at Microscale CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and Engineering University of Science and Technology of China 230026 Hefei P. R. China

The best use of photogenerated electrons and holes is crucial to boosting photocatalytic activity. Herein, a bifunctional dual-cocatalyst-modified photocatalyst is constructed based on CdS/MoO 2 /MoS 2 hollow spheres for hydrogen evolution coupled with selective pyruvic acid (PA) production from lactic acid (LA) oxidation. MoS 2 and MoO 2 are simultaneously obtained from the conversion of CdMoO 4 in one step. In a photocatalytic process, the MoS 2 and MoO 2 function as the reduction and oxidation centers on which photogenerated electrons and holes accumulate and are used for hydrogen evolution reaction (HER) and PA synthesis, respectively. By monitoring the intermediates, a two-step single-electron route for PA production is proposed, initiated by the cleavage of the α-C(sp 3 )−H bond in the LA. The conversion of LA and the selectivity of PA can reach ca . 29 % and 95 % after a five-hour reaction, respectively.

关键词： CdS Dual Cocatalysts Hollow Sphere Hydrogen Evolution Organic synthesis

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Effects of Zr addition on microstructure and toughness of simulated CGHAZ in high-strength low-alloy steels

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Journal of Iron and Steel Research International 2019年第10期26卷 1117-1125页

作者： Jin-wei Lei Kai-ming Wu Yu Li Ting-ping Hou Xing Xie RDKMisra The State Key Laboratory of Refractories and Metallurgy Hubei Province Key Laboratory of Systems Science on Metallurgical ProcessingInternational Research Institute for Steel TechnologyWuhan University of Science and TechnologyWuhan 430081HubeiChina Wuhan Second Ship Design and Research Institute Wuhan 430064HubeiChina Department of Metallurgical and Materials Engineering University of Texas at El PasoEl PasoTX 79968USA

The effect of Zr addition(0.005,0.013,and 0.054 wt.%)on the microstructure and toughness of simulated coarse-grained heat-affected zone in high-strength low-alloy steels was revealed using a Gleeble 2000 thermal *** was observed that elongated MnS inclusions were formed in the lowest Zr-containing steel,while only pure equiaxed ZrO2 existed in the 0.054Zr steel(Zr content of 0.054 wt.%).Complex oxide-sulfide inclusions(ZrO2+MnS)with size of(1.40±0.25)μtm were formed in 0.013Zr steel(Zr content of 0.013 wt.%).The complex inclusions refined the prior austenite grain,and the nucleation of acicular ferrite was promoted compared to those of 0.005Zr steel(Zr content of 0.005 wt.%)and 0.054Zr ***,the 0.013Zr steel possessed superior low-temperature impact toughness in relation to 0.005Zr and 0.054Zr ***,moderate Zr addition can be considered as an effective method to refine the structure and improve the mechanical properties of the coarse-grained heat-affected zone.

关键词： High-strength low-alloy steel Welding Heat-affected zone Heat input Zirconium addition

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