A p-n heterojunction of CuI/TiO2 with enhanced photoelectrocatalytic activity for methanol electro-oxidation

被引：58

作者：

Sun, Mingjuan ^{[1
]}

Hu, Jiayue ^{[1
]}

Zhai, Chunyang ^{[1
]}

Zhu, Mingshan ^{[1
]}

Pan, Jianguo ^{[1
]}

机构：

[1] Ningbo Univ, Sch Mat Sci & Chem Engn, Ningbo 315211, Zhejiang, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2017年 / 245卷

基金：

中国国家自然科学基金;

关键词：

p-n heterojunction; CuI; TiO2; methanol oxidation; photoelectrocatalyst; RENEWABLE ENERGY; SOLAR-CELLS; SUPPORT; OXIDATION; PERFORMANCE; ELECTRODE; CATALYST; ELECTROCATALYSTS; NANOMATERIALS; FABRICATION;

D O I：

10.1016/j.electacta.2017.06.035

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this paper, a p-n heterojunction including p-type CuI and n-type TiO2 is first time constructed to be the support for the deposition of Pt. The as-prepared Pt-CuI/TiO2 modified electrode is studied for the electrocatalytic oxidation of methanol both in dark and under light illumination. Compare to traditional electrocatalytic oxidation, the electrocatalytic activity of Pt-CuI/TiO2 for methanol oxidation is improved with 4.0 times upon light illumination. Moreover, compare to bare CuI and TiO2 upon light illumination, the heterostructure of CuI/TiO2 displays 4.3 and 9.1 times enhanced electrocatalytic activity for methanol oxidation, respectively. The synergistic effects of photocatalysis and electrocatalysis as well as the effective charge transport in the p-n heterojunction of Pt-CuI/TiO2 contribute such big enhancement. The present studies indicate that the constructing of p-n heterojunction provides more insights in the fields of photoelectrochemical and photo-assisted fuel cell system. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：863 / 871

页数：9

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