异质结
光电流
分解水
材料科学
析氧
热液循环
载流子
氢氧化钴
光电子学
兴奋剂
氢氧化物
纳米技术
电极
催化作用
化学工程
无机化学
电化学
化学
光催化
物理化学
生物化学
工程类
作者
Songbo Wang,Yidan Wang,Jia Li,Shuang Guo,Chengzhen Meng,Lun Pan,Ji‐Jun Zou,Yawei Shi,Lei Zhang,Zhen Yin,Na Tang
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2023-10-23
卷期号:6 (21): 20240-20250
被引量:3
标识
DOI:10.1021/acsanm.3c04058
摘要
In order to address the current energy and environmental challenges, photoelectrochemical (PEC) water splitting has been widely studied, and the key point about the efficient PEC process is how to develop highly active photoanode catalysts. In this article, we report a two-step hydrothermal and electrodeposition approach to prepare a cobalt (oxy)hydroxide (CoOOH)-modified Ti-Fe2O3-In2O3 electrode by synergy of electron modulation and a heterojunction structure for promoting PEC water splitting. Under a bias of 1.23 V vs RHE, the optimized Ti-Fe2O3-In2O3/CoOOH photoanode demonstrated remarkable photocurrent density and hydrogen evolution rate as high as 1.33 mA cm–2 and 22.8 μmol cm–2 h–1, which was 5.11-fold and 5.14-fold that of bare α-Fe2O3, respectively. Characterization results indicate that Ti-doping will alter the electronic structure and improve the charge carrier density, whereas the construction of a heterojunction can realize the spatial separation of charge carriers. Meanwhile, the outer CoOOH ultrathin layer can provide a large amount of oxygen evolution reaction sites and promote the surface reaction. This work suggests that the PEC performance of Fe2O3-based photoanodes can be improved effectively by the synergy of electronic modulation and heterojunction construction.
科研通智能强力驱动
Strongly Powered by AbleSci AI