用于光电催化水分解的氧化亚铜基光电阴极研究进展  

Advances in Cu2O-based Photocathodes for Photoelectrochemical Water Splitting

作　　者：卢华森 宋世旭 贾萁森 刘光波 姜鲁华 Huasen Lu;Shixu Song;Qisen Jia;Guangbo Liu;Luhua Jiang(Nano Materials and Electrocatalysis Laboratory,College of Materials Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,Shandong Province,China)

机构地区：[1]青岛科技大学材料科学与工程学院,纳米材料与电催化实验室,山东青岛266042

出　　处：《物理化学学报》2024年第2期76-84,共9页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(22179067,22279069);山东省自然科学基金(ZR2022ZD10)资助项目。

摘　　要：随着不可再生资源的消耗及环境污染日趋严重,开发环境友好、可再生的新能源受到广泛关注。氢可通过燃料电池进行发电,被认为是理想的洁净能源载体。耦合可再生能源,如光能、风能、海洋能等,进行光电水分解制氢是有效途径之一。氧化亚铜(Cu2O)具有合适的能带结构、制备简单、资源丰富,成为光电阴极半导体的研究热点。然而,Cu2O光电阴极面临光生电荷复合较快、光腐蚀严重等挑战,导致其光电效率低、稳定性差。本综述首先简要介绍光电水分解制氢原理以及Cu2O的能带结构适配性,其次总结氧化亚铜的制备方法;重点概述提高Cu2O光电效率和稳定性的策略,包括形成氧化亚铜-n型半导体p-n结、添加助催化剂、引入空穴传输层等;结合近年来表征技术的发展,介绍先进的光电阴极表征手段;最后,对光电阴极未来的研究方向进行展望。Owing to the growing consumption of non-renewable resources and increased environmental pollution,significant attention has been directed toward developing renewable and environmentally friendly energy sources.Hydrogen has emerged as a clean energy carrier and is considered an ideal chemical for power generation via fuel cells.Using renewable energy to power hydrogen production is an attractive prospect,and hydrogen production through photoelectrochemical water splitting is considered a promising area of interest;consequently,significant research is being conducted on rationally designed photoelectrodes.Generally,a photocathode for hydrogen evolution must have a conduction band that is more negative than the reduction potential of hydrogen.Numerous photocathode materials have been developed based on this premise;these include p-Si,InP,and GaN.Compared with other photocathode materials,Cu-based compounds are advantageous owing to their low preparation costs and diverse chemical states.For example,Cu2O is a non-toxic p-type metal oxide semiconductor material with an appropriate band structure for water splitting and a direct band gap of 1.9-2.2 eV.Furthermore,the production of Cu2O is facile,and the required materials are abundant;thus,it has attracted significant interest as a material for photocathodes.However,Cu2O suffers from rapid recombination of photogenerated carriers and severe photo-corrosion,leading to unsatisfactory efficiency and poor stability.Intrinsically,the poor photo-stability of Cu2O can be attributed to the location of the redox potential of Cu2O within its bandgap,owing to which photoelectrons tend to preferentially reduce Cu2O to Cu rather than reduce water to reduction.Therefore,Cu2O itself is not an ideal hydrogen evolution catalyst.Thus,co-catalysts are necessary to improve its hydrogen evolution activity and photostability.In addition to co-catalysts,combining Cu2O with tailored n-type semiconductors to generate built-in electric fields of p-n junctions has attracted extensive attention o

关 键 词：光电催化 氧化亚铜 析氢反应 光阴极 水分解 

分 类 号：O646[理学—物理化学]