Formation of multifaceted nano-groove structure on rutile TiO2 photoanode for efficient electron-hole separation and water splitting

被引：20

作者：

Zhan, Xiaoyi ^{[1
,4
]}

Luo, Yaling ^{[3
]}

Wang, Ziyu ^{[2
]}

Xiang, Yao ^{[2
]}

Peng, Zheng ^{[2
]}

Han, Yong ^{[2
]}

Zhang, Hui ^{[1
]}

Chen, Ruotian ^{[3
]}

Zhou, Qin ^{[2
]}

Peng, Hongru ^{[2
]}

Huang, Hao ^{[2
]}

Liu, Weimin ^{[2
]}

Ou, Xin ^{[1
,4
]}

Ma, Guijun ^{[2
]}

Fan, Fengtao ^{[3
]}

Yang, Fan ^{[2
]}

Li, Can ^{[3
]}

Liu, Zhi ^{[1
,2
,4
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China

[2] Shanghai Tech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China

[3] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian Natl Lab Clean Energy, Dalian 116023, Liaoning, Peoples R China

[4] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

来源：

JOURNAL OF ENERGY CHEMISTRY | 2022年 / 65卷

基金：

中国国家自然科学基金;

关键词：

TiO2; nano-grooves; Oxygen vacancies; Photoetching; Water oxidation; CHARGE SEPARATION; TITANIUM; ARRAYS; PHOTOCATALYSIS; ABSORPTION; DEPENDENCE; INCREASES; CRYSTALS; HYDROGEN; FACETS;

D O I：

10.1016/j.jechem.2021.05.007

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Photoelectrochemical (PEC) water-splitting using solar energy holds great promise for the renewable energy future, and a key challenge in the development of industry viable PEC devices is the unavailability of high-efficient photoanodes. Herein, we designed a TiO2 model photocatalyst with nano-groove pattern and different surface orientation using low-energy Ar+ irradiation and photoetching of TiO2, and significantly improved the intrinsic activity for PEC water oxidation. High-resolution transmission electron microscopy directly manifests that the grooves consist of highly stepped surface with < 110 > steps and well-crystallized. Transient absorption spectroscopy reveals the groove surface that allows for increased recovery lifetime, which ensures promoted electron-hole separation efficiency. Surface photo voltage directly shows the carrier separation and transportation behaviors, verified by selective photodeposition, demonstrating the groove surface on TiO2 contributes to electron-hole separation. This work proposes an efficient and scalable photoanode strategy, which potentially can open new opportunities for achieving efficient PEC water oxidation performance. (c) 2021 Published by ELSEVIER B.V. and Science Press on behalf of Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences.

引用

页码：19 / 25

页数：7

共 51 条

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