Plasmonic Enhancement in BiVO4 Photonic Crystals for Efficient Water Splitting

被引：153

作者：

Zhang, Liwu ^{[1
]}

Lin, Chia-Yu ^{[2
]}

Valev, Ventsislav K. ^{[1
]}

Reisner, Erwin ^{[2
]}

Steiner, Ullrich ^{[1
]}

Baumberg, Jeremy J. ^{[1
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Dept Phys, Cambridge CB3 0HE, England

[2] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England

来源：

SMALL | 2014年 / 10卷 / 19期

基金：

英国工程与自然科学研究理事会;

关键词：

SCANNING ELECTROCHEMICAL MICROSCOPY; NANOSTRUCTURED ALPHA-FE2O3; AMPLIFIED PHOTOCHEMISTRY; SLOW-PHOTON; SOLAR; PHOTOANODES; PHOTOELECTRODES; PHOTOOXIDATION; CONVERSION; CATALYST;

D O I：

10.1002/smll.201400970

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Photo-electrochemical water splitting is a very promising and environmentally friendly route for the conversion of solar energy into hydrogen. However, the solar-to-H-2 conversion efficiency is still very low due to rapid bulk recombination of charge carriers. Here, a photonic nano-architecture is developed to improve charge carrier generation and separation by manipulating and confining light absorption in a visible-light-active photoanode constructed from BiVO4 photonic crystal and plasmonic nanostructures. Synergistic effects of photonic crystal stop bands and plasmonic absorption are observed to operate in this photonic nanostructure. Within the scaffold of an inverse opal photonic crystal, the surface plasmon resonance is significantly enhanced by the photonic Bragg resonance. Nanophotonic photoanodes show AM 1.5 photocurrent densities of 3.1 +/- 0.1 mA cm(-2) at 1.23 V versus RHE, which is among the highest for oxide-based photoanodes and over 4 times higher than the unstructured planar photoanode.

引用

页码：3970 / 3978

页数：9

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