Highly efficient photocatalytic hydrogen production of platinum nanoparticle-decorated SiC nanowires under simulated sunlight irradiation
Highly efficient photocatalytic hydrogen production of platinum nanoparticle-decorated SiC nanowires under simulated sunlight irradiation
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DOI：
10.1016/j.ijhydene.2014.07.068
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发表时间：
2014-09-12
影响因子：
7.2
通讯作者：
Li, Ye
中科院分区：
文献类型：
--
作者：
Wang, Mingming;Chen, Jianjun;Li, Ye
在模拟阳光照射下，研究了铂纳米粒子修饰的SiC纳米线光催化剂的光催化水裂解反应。Pt/SiC催化剂对水裂解具有较强的光催化活性，其h -2平均析出速率可达4572 μ L g(-1) h（-1）。在Pt/SiC催化剂上，H-2的平均产率比未修饰Pt纳米粒子的SiC纳米线高88%。XPS光谱表明，C原子周围的电子可以快速转移到Si和Pt活性位点进行水分裂。光致发光光谱表明，铂作为光电子的受体，有效抑制了碳化硅纳米线的电子-空穴对复合。新型Pt/SiC具有成为低成本、环保的太阳能制氢光催化剂的巨大潜力。Copyright (C) 2014, Hydrogen Energy Publications， LLC.由Elsevier Ltd.出版。版权所有。
Photocatalytic water splitting reaction of platinum nanoparticle-decorated SiC nanowire photocatalyst was investigated under the simulated sunlight irradiation. The Pt/SiC catalyst shows an enhanced photocatalytic activity for water splitting, and its average H-2 evolution rate has been up to 4572 mu L g(-1) h(-1). The average H-2 production rate over the Pt/SiC catalyst is 88% higher than that of SiC nanowires without Pt nanoparticle-decoration. The XPS spectra exhibit that the surrounding electrons of C atoms can be rapidly transferred to Si and Pt active sites for water splitting. The photoluminescence spectra show that the platinum acts as an acceptor of photoelectrons to effectively restrain the electron-hole pair recombination of SiC nanowires. The novel Pt/SiC has great potential of being a low-cost, environmentally friendly solar-hydrogen production photocatalyst. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.