Plasmonic Photoanodes for Solar Water Splitting with Visible Light
Plasmonic Photoanodes for Solar Water Splitting with Visible Light
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DOI：
10.1021/nl302796f
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发表时间：
2012-09-01
期刊：
影响因子：
10.8
通讯作者：
Moskovits, Martin
中科院分区：
文献类型：
--
作者：
Lee, Joun;Mubeen, Syed;Moskovits, Martin
我们报告了一个等离子体水分裂电池，其中95%的有效电荷载流子来自表面等离子体衰变为热电子，证明了燃料生产效率高达20倍，在可见光，相比，紫外线，波长。电池的功能是照射一个密集的排列的金纳米棒阵列，上面覆盖着TiO 2，形成肖特基金属/半导体界面，收集热电子并将其传导到未照射的铂反电极，在那里产生氢气。在Au纳米棒中产生的正电荷起到空穴的作用，并被氧化催化剂提取，该氧化催化剂将水电催化氧化成氧气。
We report a plasmonic water splitting cell in which 95% of the effective charge carriers derive from surface plasmon decay to hot electrons, as evidenced by fuel production efficiencies up to 20-fold higher at visible, as compared to UV, wavelengths. The cell functions by illuminating a dense array of aligned gold nanorods capped with TiO2, forming a Schottky metal/semiconductor interface which collects and conducts the hot electrons to an unilluminated platinum counter-electrode where hydrogen gas evolves. The resultant positive charges in the Au nanorods function as holes and are extracted by an oxidation catalyst which electrocatalytically oxidizes water to oxygen gas.