Architecture modification and In^(3+)-doping of WO_(3) photoanodes to boost the photoelectrochemical water oxidation performance  

作　　者：Peng Zeng Yang Zhou Lingling Peng Shaochuan Wang Tianyou Peng 

机构地区：[1]School of Food and Pharmaceutical Engineering,Zhaoqing University,Zhaoqing 526061,China [2]College of Chemistry and Molecular Sciences,Wuhan University,Wuhan 430072,China

出　　处：《Science China Chemistry》2023年第11期3269-3279,共11页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(21975190 and 25173166);the Science and Technology Planning Project of Shenzhen Municipality(JCYJ20180302153921190);the Characteristic Innovation Project of Colleges and Universities of Guangdong Province(2022KTSCX149);the Research Fund Project of Zhaoqing University(KY202136);the College Students’Innovative Project of Guangdong Province(pdjh2022b0556,X202210580144),China。

摘　　要：WO_(3) photoanodes have been widely utilized for the oxygen evolution reaction(OER)in the photoelectrochemical water splitting system.Herein,the effects of hydrazine hydrate modification and In^(3+)-doping on the physicochemical properties and photocurrent density of the WO_(3) photoanode prepared by hydrothermally treating at 160℃followed by calcining at 500℃are investigated.Among them,the hydrazine hydrate in the hydrothermal solution can serve as a texture regulator,resulting in the formation of WO_(3) films with the layered architecture stacked by nanosheets dominantly exposed(020)facets,which allows the WO_(3) films to have faster charge separation and larger specific surface area for OER according to the characterization results of microstructures and photoelectrochemcial behaviors;while the In^(3+)-doping can optimize the energy band structure of WO_(3) and adjust the work function to increase the driving force of OER based on the ultraviolet photoelectron spectroscopy,Mott–Schottky and open-circuit photovoltage plots.Under the simulated sunlight(AM1.5G)illumination,the designed In^(3+)–WO_(3)(N_2H_4)photoanode in Na_2SO_4 solution delivers amaximum incident photon-to-current efficiency of 38.6%at 410 nm and a photocurrent density of 1.93 mA cm^(-2)at 1.23 V vs.RHE,which is 2.8 and 3.0 times higher than the pristine WO_(3) photoanode,respectively.This study provides a promising strategy to improve the water splitting performance of nanostructured WO_(3) photoanodes by altering the architecture and introducing heteroatoms.

关 键 词：WO_(3)photoanode oxygen evolution reaction photoelectrochemical water splitting DOPING architecture modification 

分 类 号：TQ116.2[化学工程—无机化工] O646.5[理学—物理化学]