Highly Stable Photoelectrochemical Water Splitting and Hydrogen Generation Using a Double-Band InGaN/GaN Core/Shell Nanowire Photoanode

被引:188
作者
AlOtaibi, B. [1 ]
Nguyen, H. P. T. [1 ]
Zhao, S. [1 ]
Kibria, M. G. [1 ]
Fan, S. [1 ]
Mi, Z. [1 ]
机构
[1] McGill Univ, Dept Elect & Comp Engn, Montreal, PQ H3A 0E9, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Nanowire; InGaN; photoelectrochemical water splitting; hydrogen; solar fuels; MOLECULAR-BEAM EPITAXY; LIGHT-EMITTING-DIODES; N-TYPE GAN; VISIBLE-LIGHT; FILM ELECTRODES; AQUEOUS WATER; THIN-FILM; OXIDATION; ARRAYS; ENERGY;
D O I
10.1021/nl402156e
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We report on the first demonstration of stable photoelectrochemical water splitting and hydrogen generation on a double-band photoanode in acidic solution (hydrogen bromide), which is achieved by InGaN/CaN core/shell nanowire arrays grown on Si substrate using catalyst-free molecular beam epitaxy. The nanowires are doped n-type using Si to reduce the surface depletion region and increase current conduction. Relatively high incident-photon-to-current-conversion efficiency (up to similar to 27%) is measured under ultraviolet and visible light irradiation. Under simulated sunlight illumination, steady evolution of molecular hydrogen is further demonstrated.
引用
收藏
页码:4356 / 4361
页数:6
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