Nanostructured WO3/BiVO4 Photoanodes for Efficient Photoelectrochemical Water Splitting

被引：216

作者：

Pihosh, Yuriy ^{[1
]}

Turkevych, Ivan ^{[2
]}

Mawatari, Kazuma ^{[1
]}

Asai, Tomohiro ^{[3
]}

Hisatomi, Takashi ^{[3
]}

Uemura, Jin ^{[1
]}

Tosa, Masahiro ^{[2
]}

Shimamura, Kiyoshi ^{[2
]}

Kubota, Jun ^{[3
]}

Domen, Kazunari ^{[3
]}

Kitamori, Takehiko ^{[1
]}

机构：

[1] Univ Tokyo, Dept Appl Chem, Sch Engn, Bunkyo Ku, Tokyo 1138656, Japan

[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[3] Univ Tokyo, Dept Chem Syst, Sch Engn, Bunkyo Ku, Tokyo 1138656, Japan

来源：

SMALL | 2014年 / 10卷 / 18期

关键词：

nanorods; WO3; BiVO4; photocatalytic water splitting; glancing angle deposition; GLANCING ANGLE DEPOSITION; SOLAR; TEMPERATURE; FILMS; OXIDATION; TIO2;

D O I：

10.1002/smll.201400276

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Nanostructured photoanodes based on well-separated and vertically oriented WO3 nanorods capped with extremely thin BiVO4 absorber layers are fabricated by the combination of Glancing Angle Deposition and normal physical sputtering techniques. The optimized WO3-NRs/BiVO4 photoanode modified with Co-Pi oxygen evolution co-catalyst shows remarkably stable photocurrents of 3.2 and 5.1 mA/cm(2) at 1.23 V versus a reversible hydrogen electrode in a stable Na2SO4 electrolyte under simulated solar light at the standard 1 Sun and concentrated 2 Suns illumination, respectively. The photocurrent enhancement is attributed to the faster charge separation in the electronically thin BiVO4 layer and significantly reduced charge recombination. The enhanced light trapping in the nanostructured WO3-NRs/BiVO4 photoanode effectively increases the optical thickness of the BiVO4 layer and results in efficient absorption of the incident light.

引用

页码：3692 / 3699

页数：8

共 32 条

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