WO_(3)/PDA光电极的制备及光电性能的研究  

Research on Construction and Photoelectrochemical Performances of WO_(3)/PDA Photoelectrode

作　　者：李艳婷 韩香 陈辉 田林海 Li Yanting;Han Xiang;Chen Hui;Tian Linhai(College of New Energy and Materials Engineering,ShanXi University of Electronic Science and Technology,Linfen 041000,China)

机构地区：[1]山西电子科技学院新能源与材料工程学院,山西临汾041000

出　　处：《山东化工》2024年第18期33-36,39,共5页Shandong Chemical Industry

基　　金：山西省基础研究计划青年科学项目(202203021222334)。

摘　　要：基于半导体的光电化学(PEC)水分解技术,利用可再生能源制氢,能够实现氢能全产业链的绿色无碳化,是极具潜力的氢能发展路径之一。氧化钨(WO_(3))作为一种可见光响应的n型半导体,是PEC水分解制氢最有前途的材料之一。然而,可见光利用率低以及光生载流子复合率高等问题严重影响着WO_(3)光电极的实际应用。将有机半导体聚多巴胺(PDA)与无机半导体WO_(3)结合,成功构筑了WO_(3)/PDA复合电极,其光电流密度在1.23 V vs.RHE偏压下达到0.67 mA/cm^(2),是单一WO_(3)光电极(0.30 mA/cm^(2)1.23 V vs.RHE)的2.23倍。研究表明,在WO_(3)/PDA复合电极中,有机组分PDA展现出了优异的可见光吸收能力,无机组分WO_(3)提供了高载流子迁移率和快速的电荷传输通道,同时WO_(3)与PDA之间形成的异质结显著提高了载流子的分离效率,从而实现了载流子的有效分离与传输,因此光电催化性能得到了显著的提升。提出了一种通过构筑有机-无机复合结构来增强光电极光电性能的新策略。Photoelectrochemical(PEC)water splitting technology based on semiconductors,which harnesses renewable energy to produce hydrogen,represents a promising pathway towards achieving a fully green and carbon-neutral hydrogen energy chain.Tungsten oxide(WO_(3)),an n-type semiconductor material responsive to visible light,is considered one of the most promising candidates for PEC water splitting.However,practical applications of WO_(3)photoanodes are severely hindered by issues such as low visible light utilization efficiency and high photogenerated carrier recombination rates.In this work,WO_(3)/PDA composite photoelectrode was successfully constructed by combining the organic semiconductor polydopamine(PDA)with the inorganic semiconductor WO_(3).The WO_(3)/PDA photoelectrode showed a photocurrent value of 0.67 mA/cm^(2)(1.23 V vs.RHE),which is 2.23 times than that of WO_(3)photoanode(0.30mA/cm^(2)1.23V vs.RHE).In the WO_(3)/PDA photoelectrode,the organic component PDA exhibits excellent visible light absorption capabilities,while the inorganic component WO_(3)provides high carrier mobility and rapid charge transport channels.Furthermore,the heterojunction formed between WO_(3)and PDA significantly enhances carrier separation efficiency,enabling effective carrier separation and transport,thereby leading to a remarkable improvement in PEC performance.This work presents a novel strategy to enhance the photoelectrochemical performance of photoelectrodes by constructing organic-inorganic composite structures.

关 键 词：WO_(3) PDA 光电极 光电性能 

分 类 号：TQ116.2[化学工程—无机化工] TQ426