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The component-activity interrelationship of cobalt-based bifunctional electrocatalysts for overall water splitting:Strategies and performance

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Journal of Energy Chemistry 2024年第4期91卷 453-474页

作者： Mingjie Sun Riyue Ge Sean li liming Dai Yiran li Bin liu wenxian li School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Institute of Textiles and Clothing The Hong Kong Polytechnic UniversityHong Kong SAR 999077China School of Materials Science and Engineering University of New South WalesSydneyNew South Wales 2052Australia UNSW Materials&Manufacturing Futures Institute UNSW SydneyNew South Wales 2052Australia School of Chemical Engineering University of New South WalesSydneyNew South Wales 2052Australia

Cobalt-based electrocatalysts take advantage of potentially harmonizable microstructure and flexible coupling effects compared to commercial noble metal-based catalytic ***,conventional water electrolysis systems based on cobalt-based monofunctional hydrogen evolution reaction(HER)or oxygen evolution reaction(OER)catalysts have certain shortcomings in terms of resource utilization and *** contrast,cobalt-based bifunctional catalysts(CBCs)have attracted much attention in recent years for overall water splitting systems because of their practicality and reduced preparation cost of *** review aims to address the latest development in CBCs for total *** main modification strategies of CBCs are systematically classified in water electrolysis to provide an overview of how to regulate their morphology and electronic ***,the catalytic performance of CBCs in total-hydrolysis is summarized according to the types of cobalt-based phosphides,sulfides and oxides,and the mechanism of strengthened electrocatalytic ability is emphasized through combining experiments and theoretical *** efforts are finally suggested to focus on exploring the dynamic conversion of reaction intermediates and building near-industrial CBCs,designing advanced CBC materials through micro-modulation,and addressing commercial applications.

关键词： Cobalt Bifunctional electrocatalysis Water splitting Modification strategies Electrocatalytic performances

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High-entropy catalysts for electrochemical water-electrolysis of hydrogen evolution and oxygen evolution reactions

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Frontiers in Energy 2024年第3期18卷 265-290页

作者： Simiao SHA Riyue GE Ying li Julie M.CAIRNEY Rongkun ZHENG Sean li Bin liU Jiujun ZHANG wenxian li School of Materials Science and Engineering Shanghai UniversityShanghai 200444China School of Chemical and Environmental Engineering Anhui Polytechnic UniversityWuhu 241000China Australian Centre for Microscopy and Microanalysis School of AerospaceMechanical and Mechatronic EngineeringThe University of SydneySydney NSW 2006Australia School of Physics The University of SydneySydney NSW 2006Australia School of Materials Science and Engineering UNSW Materials&Manufacturing Futures InstituteUniversity of New South WalesSydney NSW 2052Australia College of Materials Science and Engineering Fuzhou UniversityFuzhou 350108China

High entropy materials (HEMs) have developed rapidly in the field of electrocatalytic water-electrolysis for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) due to their unique properties. In particular, HEM catalysts are composed of many elements. Therefore, they have rich active sites and enhanced entropy stability relative to single atoms. In this paper, the preparation strategies and applications of HEM catalysts in electrochemical water-electrolysis are reviewed to explore the stabilization of HEMs and their catalytic mechanisms as well as their application in support green hydrogen production. First, the concept and four characteristics of HEMs are introduced based on entropy and composition. Then, synthetic strategies of HEM catalysts are systematically reviewed in terms of the categories of bottom-up and top-down. The application of HEMs as catalysts for electrochemical water-electrolysis in recent years is emphatically discussed, and the mechanisms of improving the performance of electrocatalysis is expounded by combining theoretical calculation technology and ex-situ/in situ characterization experiments. Finally, the application prospect of HEMs is proposed to conquer the challenges in HEM catalyst fabrications and applications.

关键词： high-entropy electrocatalysis synthetic methods water-electrolysis hydrogen and oxygen evolutions

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Molten salt assisted self-activated carbon with controllable architecture for aqueous supercapacitor

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Journal of Materials Science & Technology 2023年第25期156卷 107-117页

作者： Wei Zhang wenxian li Sean li School of Materials Science and Engineering The University of New South WalesKensingtonNew South Wales 2052Australia UNSW Materials and Manufacturing Futures Institute The University of New South WalesKensingtonNew South Wales 2052Australia

Activated carbons have been widely employed as electrode materials of aqueous supercapacitors but the use of hazardous and corrosive activating agents challenges conventional activation ***,using a unique molten salt assisted self-activation technique,we have devised an eco-friendly and simple method to synthesize oxygen-rich hierarchical porous carbon with controllable *** of sodium carboxymethylcellulose and NaCl was pyrolyzed in one step,creating in-situ produced Na_(2)CO_(3)-NaCl molten salt that carried out the activation ***2 CO3 acts as the activating agent in the reaction media of NaCl during the self-activation *** obtained carbon exhibited a remarkable specific capacitance of 278 F g^(−1) at 0.5 A g^(−1) and retained 76%capacitance at 50 A g^(−1) in a three-electrode *** fabricated aqueous coin cell achieved 81%capacitance retention at 50 A g^(−1) and the highest specific energy density of 12.8 Wh kg^(−1) at 214.6 W kg^(−1),which are superior compared to the commercial activated carbon(64%at 50 A g^(−1) and 8.4 Wh kg^(−1) at 194.8 W kg^(−1)).Moreover,capacitance fading was not observed after 10000 cycles at 5 A g^(−1).Considering the species diversity and low cost of self-salt polymers on the market,this strategy will expect to become a scalable approach for synthesizing high-performance capacitive carbons.

关键词： Molten salt Self-template Porous carbon Controllable architecture Aqueous supercapacitors

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Discovery of orthorhombic perovskite oxides with low thermal conductivity by first-principles calculations

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Journal of Advanced Ceramics 2022年第10期11卷 1596-1603页

作者： Yuchen liU Kaili CHU Yu ZHOU Yiran li wenxian li Bin liU Institute for Advanced Ceramics School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150080China School of Materials Science and Engineering Shanghai UniversityShanghai 200444China School of Materials Science and Engineering University of New South WalesSydney 2052Australia

Orthorhombic perovskite oxides are studied by high-throughput first-principles calculations to explore new thermal barrier coating(TBC)materials with low thermal *** mechanical and thermal properties are predicted for 160 orthorhombic perovskite *** average atomic volume is identified as a possible predictor of the thermal conductivity for the perovskite oxides,as it has a good correlation with the thermal *** compounds,i.e.,LaTmO_(3),LaErO_(3),LaHoO_(3),SrCeO_(3),and SrPrO_(3),having thermal conductivities under 1 W·m^(-1)·K^(-1) and good damage tolerance,are proposed as novel TBC *** obtained data are expected to inspire the design of perovskite oxide-based TBC materials and also support their future functionality investigations.

关键词： first-principles calculations perovskite oxide thermal conductivity mechanical property

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Carbon-based bifunctional electrocatalysts for oxygen reduction and oxygen evolution reactions:Optimization strategies and mechanistic analysis

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Journal of Energy Chemistry 2022年第8期31卷 234-265,I0008页

作者： Huidong Xu Jack Yang Riyue Ge Jiujun Zhang Ying li Mingyuan Zhu liming Dai Sean li wenxian li Institute of Materials Shanghai University School of Materials Science and Engineering UNSW Materials and Manufacturing Futures InstituteUniversity of New South Wales Institute for Sustainable Energy Shanghai University School of Chemical Engineering University of New South Wales Shanghai Key Laboratory of High Temperature Superconductors

Electrocatalysts are one of the essential components for the devices of high-efficiency green energy storage and conversion,such as metal-air cells,fuel cells,and water electrolysis *** catalysts made from noble metals possess high catalytic performance in both oxygen reduction reaction(ORR)and oxygen evolution reaction(OER),their scarcity and expensiveness significantly limit large-scale *** this regard,metal-free/non-noble metal carbon-based catalysts have become competitive alternatives to replace catalysts made of noble ***,low catalytic ORR/OER performance is the challenge of carbon-based catalysts for the commercial applications of metal-air *** solve the problem of poor catalytic performance,two strategies have been proposed:(1)controlling the microstructure of the catalysts to expose more active sites as the channels of rapid mass and electron transfer;and(2)reducing the reaction energy barrier by optimizing the electronic structures of the catalysts via surface ***,we review different types of bifunctional ORR/OER electrocatalysts with the activated surface *** focus on how the challenge can be overcome with different methods of material synthesis,structural and surface characterization,performance validation/optimization,to outline the principles of surface modifications behind catalyst *** particular,we provide critical analysis in the challenges that we are facing in structural design and surface engineering of bifunctional ORR/OER catalysts and indicate the possible solution for these problems,providing the society with clearer ideas on the practical prospects of noble-metal-free electrocatalysts for their future applications.

关键词： Electrocatalyst Bifunctionality Oxygen reduction Oxygen evolution Carbons transition metals Surface engineering Microstructure

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Molybdenum disulfide(MoS2)-based electrocatalysts for hydrogen evolution reaction:From mechanism to manipulation

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Journal of Energy Chemistry 2022年第11期31卷 45-71,I0003页

作者： Yao Xu Riyue Ge Jack Yang Jiancheng li Sean li Ying li Jiujun Zhang Jing Feng Bin liu wenxian li Institute of Materials School of Materials Science and EngineeringShanghai UniversityShanghai 200444China School of Materials Science and Engineering University of New South WalesSydney NSw 2052Australia Materials and Manufacturing Futures Institute University of NewSouthWalesSydney NSW2052Australia School of Materials Science and Engineering Shanghai UniversityShanghai 200444China InstituteforSustainable Energy Shanghai UniversityShanghai 200444China Collge of Materials Science and Engineering Fuzhou UniversityFuzhou 350108FujianChina Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093YunnanChina

Molybdenum disulfide(MoS_(2))-based materials as the non-noble metal catalysts have displayed the potential capability to drive electrocatalytic hydrogen evolution reaction(HER)for green hydrogen production along with their intrinsic activity,tunable electronic properties,low cost,and abundance reserves,which have attracted intensive attention as alternatives to the low-abundance and high-cost platinum-based ***,their insufficient catalytic HER activities and stability are the major challenges for them to become practically ***,the MoS_(2)-based electrocatalysts for HER are comprehensively reviewed to explain the fundamental science behind the manipulations of the crystal structure,microstructure,surface,and interface of MoS_(2) in order to enhance its catalytic performance through changing the electrical conductivity,the number of active sites,surface wettability,and the Gibbs free energy for hydrogen adsorption(ΔGH).Recent studies in surface/interface engineering,such as phase engineering,defect engineering,morphology design,and heterostructure construction,are analyzed to reveal the state-of-the-art strategies for designing and preparing the cost-effective and highperformance MoS_(2)-based catalysts through optimizing the charge transfer,surface-active sites,ΔGH,and surface ***,the perspectives,challenges,and future research directions of HER electrocatalysis are also given to facilitate the further research and development of HER catalysts.

关键词： Surface/interface engineering Hydrogen evolution reaction Molybdenum disulfide Mechanisms

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Advanced Strategies for Stabilizing Single‑Atom Catalysts for Energy Storage and Conversion

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Electrochemical Energy Reviews 2022年第3期5卷 1-41页

作者： wenxian li Zehao Guo Jack Yang Ying li Xueliang Sun Haiyong He Sean li Jiujun Zhang Institute of Materials Shanghai UniversityShanghai 200072China UNSW Materials and Manufacturing Futures Institute School of Materials Science and EngineeringThe University of New South WalesSydneyNSW 2052Australia College of Sciences Institute for Sustainable EnergyShanghai UniversityShanghai 200444China Department of Mechanical and Materials Engineering University of Western OntarioLondonON N6A 5B9Canada Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201ZhejiangChina

Well-defined atomically dispersed metal catalysts(or single-atom catalysts)have been widely studied to fundamentally under-stand their catalytic mechanisms,improve the catalytic efficiency,increase the abundance of active components,enhance the catalyst utilization,and develop cost-effective catalysts to effectively reduce the usage of noble *** single-atom cata-lysts have relatively higher selectivity and catalytic activity with maximum atom utilization due to their unique characteristics of high metal dispersion and a low-coordination ***,freestanding single atoms are thermodynamically unstable,such that during synthesis and catalytic reactions,they inevitably tend to agglomerate to reduce the system energy associated with their large surface ***,developing innovative strategies to stabilize single-atom catalysts,including mass-separated soft landing,one-pot pyrolysis,co-precipitation,impregnation,atomic layer deposition,and organometallic complexation,is critically *** types of supporting materials,including polymers,have been commonly used to stabilize single atoms in these fabrication ***,we review the stabilization strategies of single-atom catalyst,including different synthesis methods,specific metals and carriers,specific catalytic reactions,and their advantages and *** particular,this review focuses on the application of polymers in the synthesis and stabilization of single-atom catalysts,including their functions as carriers for metal single atoms,synthetic templates,encapsulation agents,and protection agents during the fabrication *** technical challenges that are currently faced by single-atom catalysts are summarized,and perspectives related to future research directions including catalytic mechanisms,enhancement of the catalyst loading content,and large-scale implementation are proposed to realize their practical applications.

关键词： Single-atom catalyst Stabilization strategy Coordination environment Polymer Encapsulation agent Protection agent

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基于建构主义理论的在线气道管理技能培训课程实践

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临床麻醉学杂志 2024年第4期40卷 433-436页

作者：刘卫卫夏俊明傅丹云汪鼎鼎李文献韩园复旦大学附属眼耳鼻喉科医院麻醉科上海市200031

随着互联网技术和教育平台的发展,医学教育理念和模式发生转变,在线医学继续教育成为新趋势。自2019年底开始,本院麻醉科教学团队采用导师在线授课结合学员本地实践的方式,开展在线气道管理技能系列培训课程的探索。教学团队运用建构主... 详细信息

随着互联网技术和教育平台的发展,医学教育理念和模式发生转变,在线医学继续教育成为新趋势。自2019年底开始,本院麻醉科教学团队采用导师在线授课结合学员本地实践的方式,开展在线气道管理技能系列培训课程的探索。教学团队运用建构主义教学思想并结合互联网技术,对气道管理技能培训课程进行了系统化及在线化设计,取得了良好的教学效果。本文将经喉罩气道管理技能的在线培训课程设计作为案例进行探讨,以期为医学技能培训的探索提供参考。

关键词：气道管理技能培训喉罩课程设计在线系统

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PREPARATION　OF　AMORPHOUS　Mo_5Si_3　BY　MECHANICAL　ALLOYING　AND　THE　CRYSTALliZATION

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中国有色金属学会会刊：英文版 1995年第4期5卷 118-121页

作者： li, Mingwei Tang, Renzheng li, wenxian Central South Univ of Technology Changsha China

ＰＲＥＰＡＲＡＴＩＯＮＯＦＡＭＯＲＰＨＯＵＳＭｏ_５Ｓｉ_３ＢＹＭＥＣＨＡＮＩＣＡＬＡＬＬＯＹＩＮＧＡＮＤＴＨＥＣＲＹＳＴＡＬＬＩＺＡＴＩＯＮＬｉＭｉｎｇｗｅｉ；ＴａｎｇＲｅｎｚｈｅｎｇ；ＬｉＷｅｎｘｉａｎ（Ｄｅｐａｒ... 详细信息

ＰＲＥＰＡＲＡＴＩＯＮＯＦＡＭＯＲＰＨＯＵＳＭｏ_５Ｓｉ_３ＢＹＭＥＣＨＡＮＩＣＡＬＡＬＬＯＹＩＮＧＡＮＤＴＨＥＣＲＹＳＴＡＬＬＩＺＡＴＩＯＮＬｉＭｉｎｇｗｅｉ；ＴａｎｇＲｅｎｚｈｅｎｇ；ＬｉＷｅｎｘｉａｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳ...

关键词： amorphous alloy mechanical alloying Mo5Si3 crystallization

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Effects of alcohol on digestion,absorption and metabolism of sea cucumber saponins in healthy mice

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Food Science and Human Wellness 2024年第1期13卷 137-145页

作者： wenxian Dang Rong li Jinyue Yang Changhu Xue Qingrong Huang Yuming Wang Tiantian Zhang College of Food Science and Engineering Ocean University of ChinaQingdao 266003China Laboratory for Marine Drugs and Bioproducts Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Department of Food Science Rutgers State University New BrunswickNJ 08901USA

Sea cucumber saponins have attracted more attention in recent years due to biological *** is a popular practice to soak sea cucumber in Baijiu at home and being applied to industrial manufacturing in ***,knowledge of the effect of alcohol on the absorption and metabolism of sea cucumber saponins is *** effects of alcohol on digestion,absorption and metabolism of sea cucumber saponins in BALB/c mice were investigated after gavage and tail intravenous *** results showed that the content of saponins in serum and liver was significantly higher under the influence of alcohol than that in the control group after oral *** promoted the absorption of sea cucumber saponins prototype as well as inhibited the process of saponins being transformed into deglycositic metabolites in the small ***,sea cucumber saponins remained in circulation for a long time and alcohol slowed down the clearance of sea cucumber saponins under the influence of alcohol after intravenous *** confirmed the feasibility of marinating sea cucumber in Baijiu to improve the efficacy of saponins and provides an important theoretical basis for the utilization of sea cucumber and the development of sea cucumber liquor.

关键词： Holothurin A Echinoside A Alcohol Absorption Metabolism

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