Surface selective passivation and FexNi1-xOOH co-modified Fe2O3 photoanode toward high-performance water oxidation

被引：18

作者：

Ba, Kaikai ^{[1
]}

Li, Yinyin ^{[1
]}

Zhang, Rui ^{[1
]}

Zhang, Kai ^{[1
]}

Liang, Zhijun ^{[1
]}

Liu, Yunan ^{[1
]}

Lin, Yanhong ^{[1
]}

Wang, Dejun ^{[1
]}

Xie, Tengfeng ^{[1
]}

机构：

[1] Jilin Univ, Inst Phys Chem, Coll Chem, Changchun 130012, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2023年 / 48卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Acceptor surface states; Borate treatment; Ti-Fe2O3; photoanode; Charge separation; PEC water Oxidation; HEMATITE; EFFICIENT; UNDERLAYER; TI-FE2O3; IMPROVE; STATES;

D O I：

10.1016/j.ijhydene.2022.10.277

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Improving the water-splitting performance of hematite (a-Fe2O3) is still hindered due to its severe charge recombination and poor water oxidation kinetics. Herein, borate-treated Ti -Fe2O3 combined with a FexNi1-xOOH cocatalyst (FexNi1-xOOH/B/Ti-Fe2O3) greatly improved the performance of Ti-Fe2O3, and reached a notable photocurrent density of 3.39 mA/cm2 at 1.23 V vs. RHE. Transient surface photovoltage spectroscopy (TPV) directly reveals that [B(OH)4]- as a Lewis base can selectively passivate acceptor surface states on Ti -Fe2O3 photoanode surface, efficiently enhancing the charge separation efficiency. Moreover, the FexNi1-xOOH thin layer is devoted to further facilitate holes injection into the electrolyte, accelerating the water oxidation kinetics of Ti-Fe2O3 photoanode. The synergetic integration of acceptor surface states passivation and FexNi1-xOOH cocatalyst provides a novel strategy for the construction of efficient photoanodes by surface engineering. (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：3511 / 3519

页数：9

共 41 条

[41] Alkali Treatment for Enhanced Photoelectrochemical Water Oxidation on Hematite Photoanode [J].

Zhang, Xueliang ;

Wang, Xin ;

Yi, Xinli ;

Ye, Jinhua ;

Wang, Defa .

ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 2019, 7 (05) :5420-5429

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