光电化学水分解中铁酸盐光阴极的制备与改性  

Fabrication and Modification of Ferrite Photocathodes for Photoelectrochemical Water Splitting

作　　者：倪鑫 周扬[2] 谭瑞琴[1] 况永波 Xin Ni;Yang Zhou;Ruiqin Tan;Yongbo Kuang(Faculty of Electrical Engineering and Computer Science,Ningbo University,Ningbo 315211,China;Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China)

机构地区：[1]宁波大学信息科学与工程学院,宁波315211 [2]中国科学院宁波材料技术与工程研究所,宁波315201

出　　处：《化学进展》2020年第10期1515-1534,共20页Progress in Chemistry

基　　金：国家自然科学基金项目(No.21805298,21905288,51904288);宁波市科技创新2025重大专项(No.2018B10056);宁波市3315项目;宁波大学王宽诚基金资助。

摘　　要：由n型半导体光阳极和p型半导体光阴极组成的无偏压光电化学电池通过太阳能可以将水直接转化为高能量密度的氢气,为解决太阳能利用过程中存在的间歇性和储存问题提供了一种潜在的经济有效的解决途径。金属氧化物具有低成本和易制备等优势,相比于发展较成熟的n型光阳极金属氧化物材料,传统的p型光阴极金属氧化物材料由于金属离子易受到光电腐蚀的影响,光电极寿命的提升是个很大的挑战。作为新型的金属氧化物光阴极材料,铁酸盐具有合适的带隙、较好的光稳定性、较正的起始电位以及较低的制备成本,正在成为光电化学电池实际应用中的有力竞争者。本文阐述了光电化学水分解的基本原理与提升光电极性能的一般方法,总结了近年来颇受关注的代表性铁酸盐光阴极材料CuFeO_2、CaFeO_4与LaFeO_3在制备方法、元素掺杂以及表面修饰等方面取得的重要进展,并对铁酸盐光阴极的未来发展趋势做了展望。A non-biased photoelectrochemical(PEC)cell composed of both an n-type semiconductor photoanode and a p-type semiconductor photocathode offers a cost-effective route to convert water directly into high energy density hydrogen using solar energy,which helps address the intermittency and storage problem of solar energy during utilization.Metal oxide semiconductors have the advantages of low cost and facile preparation.Compared with well-developed n-type metal oxide photoanode materials,the stability of conventional p-type metal oxide photocathode materials still remains a challenge due to the photoelectrochemical reduction of metallic ions.As a new type of metal oxide photocathodes,ferrite photocathodes have recently emerged as competitive candidates for practical applications due to the appropriate band gaps,better photostability,higher onset potential and relatively low preparation costs.In this review,the fundamentals of PEC water splitting and common methods for improving performance of photoelectrodes are first introduced,and the recent progress of representative CuFeO2,CaFe2O4 and LaFeO3 photocathodes are summarized,including their fabrication methods,elements doping and surface modifications.Finally,perspectives on the future development of ferrite photocathodes are also discussed.

关 键 词：光电化学 铁酸盐光阴极 水分解 制备 改性 

分 类 号：O611.6[理学—无机化学] O643.3[理学—化学]