基于表面等离子体共振的可调谐波长增强光电化学电池。
Tunable Wavelength Enhanced Photoelectrochemical Cells from Surface Plasmon Resonance.
机构信息
KLGHEI of Environment and Energy Chemistry, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University , Guangzhou 510275, China.
State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China.
出版信息
J Am Chem Soc. 2016 Dec 21;138(50):16204-16207. doi: 10.1021/jacs.6b10205. Epub 2016 Dec 9.
Photocatalysis is a promising technology for renewable energy production. Many photocatalysis have realized the visible-light-driven catalytic activity. However, it is still difficult to achieve the enhanced photocatalytic activity with tunable wavelength. We have designed tunable wavelength enhanced photoelectrochemical cells by tuning the surface plasmon resonance (SPR) peaks, which can be controlled by the aspect ratios of the Au nanorods, for both the cathode with the hydrogen evolution reaction and the anode with the electrooxidation of methanol reaction. The optimal photocatalytic activity of the hydrogen evolution and electrooxidation of the methanol can be realized only when the illuminating wavelength matches with the SPR peaks, which is quite selective to the illuminating wavelength. The blue shift of the SPR peak increases the photoelectrocatalytic effect whereas the red shift enhances the photothermal effect. Such studies provide a useful way for improving the photocatalytic activity and the selectivity of the photocatalytic reactions by adjusting the illuminating wavelength.
光催化是一种很有前途的可再生能源生产技术。许多光催化剂已经实现了可见光驱动的催化活性。然而，要实现具有可调波长的增强光催化活性仍然很困难。我们通过调整表面等离子体共振（SPR）峰来设计可调波长增强的光电化学电池，这可以通过金纳米棒的纵横比来控制，对于阴极的析氢反应和阳极的甲醇电氧化反应都是如此。只有当照射波长与 SPR 峰匹配时，才能实现析氢和甲醇电氧化的最佳光催化活性，这对照射波长有很高的选择性。SPR 峰的蓝移增加了光电催化效果，而红移则增强了光热效应。这些研究为通过调整照射波长来提高光催化活性和光催化反应的选择性提供了一种有用的方法。
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