咨询与建议

看过本文的还看了

相关文献

该作者的其他文献

文献详情 >Cation-Deficient Perovskites f... 收藏

Cation-Deficient Perovskites for Clean Energy Conversion

作     者:Chao Su Wei Wang Zongping Shao 

作者机构:School of Energy and PowerJiangsu University of Science and TechnologyZhenjiang 212100China WA School of MinesMineralsEnergy and Chemical EngineeringCurtin UniversityPerth WA6102Australia State Key Laboratory of Materials-Oriented Chemical EngineeringCollege of Chemical EngineeringNanjing Tech UniversityNanjing 211816China 

出 版 物:《Accounts of Materials Research》 (材料研究述评(英文))

年 卷 期:2021年第2卷第7期

页      面:477-488页

学科分类:07[理学] 070304[理学-物理化学(含∶化学物理)] 0805[工学-材料科学与工程(可授工学、理学学位)] 0703[理学-化学] 

基  金:supported by the Australian Research Council(ARC)Discovery Project Grants DP200103332 and DP200103315 partially supported by the Natural Science Foundation of Jiangsu Province,China(Grant No.BK20190965). 

主  题:properties. perovskite oxides 

摘      要:CONSPECTUS:Clean energy conversion technologies can power progress for achieving a sustainable future,while functional materials lie at the core of these technologies.In particular,highly efficient electrocatalysts that are also cost-effective are of utmost concern in the development of several clean energy conversion technologies.These include fuel cells and water electrolyzers.It is well recognized that electrocatalysts are needed to greatly accelerate the kinetics of key electrochemical reactions involved in these energy conversion technologies.Perovskite oxides are being used as key materials that have provided impetus in the development of energy conversion and storage,in view of their flexibility in elemental composition.Over 90%of known elements are able to become incorporated into their metal cation sites,resulting in diversified properties.Several strategies can be used to tailor the intrinsic properties of perovskites,leading to the optimization of their catalytic activity for electrochemical reactions.Cation deficiency has received particular attention as a unique strategy since no other elements or phases are involved,thereby avoiding the unknown effects of foreign elements or phases on performance.In this Account,we present our recent contributions to the study of cation-deficient perovskite oxides in the context of their applications in clean energy conversion.This includes oxygen separation through mixed conducting membranes,which is important for clean combustion,electricity generation through both solid oxide fuel cells using chemical fuels and dye-sensitized solar cells,and hydrogen production from water through both solid oxide electrolysis cells at high temperatures and water electrolyzers at room temperature.The journey begins with a discussion of the defect chemistry and charge compensation mechanisms present in cationdeficient perovskite oxides and then we propose benefits from the cation deficiency strategy that can optimize the materials’properties in terms of electrical conductivity,phase structure,oxygen vacancy concentration,oxygen ion and cation diffusion properties,and proton transportation.Thus,both the sintering behavior of materials and their catalytic activity is dramatically improved for key reactions such as oxygen reduction,oxygen evolution,hydrogen evolution,and iodine reduction.Accordingly,the remarkable increases in performance of the aforementioned energy conversion systems are achieved through adopting cationdeficient perovskites.At the end of this Account,we conclude with some suggestions on how future research can broaden the applications for cation-deficient perovskites.

读者评论 与其他读者分享你的观点

用户名:未登录
我的评分