Single atom Cu-O_(2)N bridge between BiVO_(4) and COFs toward photoelectrochemical seawater splitting  

作　　者：Zicong Zhang Gaohang Song Wenming Sun Zhaorui Hua Yang Tian 

机构地区：[1]Department of Chemistry,Capital Normal University,Beijing 100048,China

出　　处：《Nano Research》2025年第4期178-188,共11页纳米研究(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.52172096 and 22375131).

摘　　要：Photoelectrochemical(PEC)water splitting has great potential for solar energy conversion to hydrogen.However,the slow charge transfer in the photoanodes remains a core issue limiting the PEC performance.In this study,we address this issue by constructing a single-atom bridge(SAB)Cu-O_(2)N at the interface between BiVO_(4) and covalent organic framework(COF)layer.X-ray absorption fine spectra and theoretical calculations demonstrate that the single-atom bridge is formed by the interfacial coordination reconstruction between BiVO_(4) and COF layers and create intermediate electronic states to facilitate the hole extraction.As a result,the SAB photoanode exhibits enhanced PEC water oxidation performance.Specifically,it achieves a photocurrent density of 4.84 mA·cm^(-2) at 1.23 V vs.reversible hydrogen electrode(RHE)in PEC simulant seawater splitting with a cocatalyst,higher than nearly all the previously reported BiVO_(4)-based photoanodes.This work offers valuable insights into fast charge transfer in PEC systems and proposes a promising strategy for designing efficient photoelectrodes for seawater splitting.

关 键 词：single-atom bridge PHOTOELECTROCHEMICAL seawater splitting 

分 类 号：O64[理学—物理化学] O646[理学—化学]