Wafer-Level Photocatalytic Water Splitting on GaN Nanowire Arrays Grown by Molecular Beam Epitaxy

被引：329

作者：

Wang, Defa ^{[1
]}

Pierre, Adrien ^{[1
]}

Kibria, Md Golam ^{[1
]}

Cui, Kai ^{[1
]}

Han, Xueguang ^{[1
]}

Bevan, Kirk H. ^{[2
,3
]}

Guo, Hong ^{[4
]}

Paradis, Suzanne ^{[5
]}

Hakima, Abou-Rachid ^{[5
]}

Mi, Zetian ^{[1
]}

机构：

[1] McGill Univ, Dept Elect & Comp Engn, Montreal, PQ H3A 2A7, Canada

[2] McGill Univ, Dept Min & Mat Engn, Montreal, PQ H3A 2T8, Canada

[3] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

[4] McGill Univ, Dept Phys, Ctr Phys Mat, Montreal, PQ H3A 2T8, Canada

[5] Def Res & Dev Canada Valcartier, Quebec City, PQ G3J 1X5, Canada

来源：

NANO LETTERS | 2011年 / 11卷 / 06期

基金：

加拿大自然科学与工程研究理事会;

关键词：

GaN; nanowire; water splitting; hydrogen; photocatalytic; molecular beam epitaxy; RHODIUM HYDROXIDE NANOPARTICLES; VISIBLE-LIGHT; HYDROGEN GENERATION; EVOLUTION; COCATALYSTS; NIOBATE; OXYGEN; METAL;

D O I：

10.1021/nl2006802

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report on the achievement of wafer-level photocatalytic overall water splitting on GaN nanowires grown by molecular beam epitaxy with the incorporation of Rh/Cr(2)O(3) core-shell nanostructures acting as cocatalysts, through which H(2) evolution is promoted by the noble metal core (Rh) while the water forming back reaction over Rh is effectively prevented by the Cr(2)O(3) shell O(2) diffusion barrier. The decomposition of pure water into H(2) and O(2) by GaN nanowires is confirmed to be a highly stable photocatalytic process, with the turnover number per unit time well exceeding the value of any previously reported GaN powder samples.

引用

页码：2353 / 2357

页数：5

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