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Engineering sulfur vacancies for boosting electrocatalytic reactions

中国化学快报:英文版 2023年第9期34卷 34-44页

作者： Xianxu Chu Yueyu Liao Lu Wang Junru Li Hui Xu Henan Key Laboratory of Biomolecular Recognition and Sensing College of Chemistry and Chemical EngineeringShangqiu Normal UniversityShangqiu 476000China Key Laboratory of Advanced Catalytic Materials and Technology Advanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou UniversityChangzhou 213164China

Transition metal sulfides are demonstrated to play an increasingly important role in boosting the deployment of ecofriendly electrocatalytic energy conversion *** is also widely recognized that the introduction of vacancies is now becoming an important and valid approach to promote the electrocatalytic *** this review,the significance of sulfur vacancies on the enhancement of catalytic performance via four main functionalities,including tuning the electronic structure,tailoring the active sites,improving the electrical conductivity,and regulating surface reconstruction,is comprehensively *** effective strategies for the sulfur vacancy engineering,such as plasma treatment,heteroatom doping,and chemical reduction are also comprehensively ***,recent achievements in sulfur vacancy fabrication on various hotspot electrocatalytic reactions are also systematically ***,a summary of the recent progress and challenges of this interesting field are organized,which hopes to guide the future development of more efficient metal sulfide electrocatalysts.

关键词： Sulfur vacancy electrocatalytic reactions Functionalities Surface properties Energy conversion

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Methods to Make Conductive Covalent Organic Frameworks for electrocatalytic Applications

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Chinese Journal of Structural Chemistry 2022年第12期41卷 107-119页

作者： Mengyang Chen Ye Zhou Shi-Bin Ren Jiong Wang School of Pharmaceutical and Materials Engineering Taizhou UniversityTaizhou 317000China Innovation Center for Chemical Sciences College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China

Covalent organic frameworks(COFs) represent a new class of crystalline organic polymer materials with the characteristics of high specific surface area, uniform pore distribution, high porosity, low density, devisable chain structures and good structural stability. These collective features play an important role in creating highly efficient electrocatalysts for energy conversion and fuel generation. Recent years have witnessed considerable advances in COF-based electrocatalysts for major electrocatalytic reactions such as oxygen reduction, oxygen evolution, hydrogen evolution, and reduction of carbon dioxide and nitrogen. However, it has been widely accepted that the poor electrical conductivity of most pristine COFs limits the further progress in electrocatalytic field. In this review, recent structural engineering strategies are summarized toward improving the electrical conductivity of COFs for achieving high performance. The researches of conductive COFs and their derivatives are described in detail. The structure-activity relationship between molecular structures of COFs and their electrocatalytic performance is emphasized. Lastly, current challenges and future perspectives on fabricating COFs as promising electrocatalysts are discussed. The purpose of this review is to provide guidelines for the preparation of highly efficient COF-based electrocatalytic materials with a view to replacing the commercially available noble metal-based electrocatalysts.

关键词： COFs electrocatalyst electrocatalytic reactions engineering strategies electrical conductivity

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