Photoelectrochemical Hydrogen Production of TiO2 Passivated Pt/Si-Nanowire Composite Photocathode
Photoelectrochemical Hydrogen Production of TiO2 Passivated Pt/Si-Nanowire Composite Photocathode
复制标题
TiO2钝化Pt/Si-纳米线复合光电阴极的光电化学产氢
DOI：
10.1021/acsami.5b04936
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发表时间：
2015-08-26
影响因子：
9.5
通讯作者：
Gao, Lian
中科院分区：
文献类型：
--
作者：
Li, Shipu;Zhang, Peng;Gao, Lian
采用原子层沉积法（ALD）对Pt纳米颗粒修饰的硅纳米线阵列表面进行了TiO 2钝化处理。三明治结构的TiO 2/Pt/SiNW显示出上级的光电化学性能的控制平面硅电极，特别是在集中的太阳辐射。通过大于15 nm的TiO 2层与水性电解质分离的Pt纳米颗粒仍然很好地催化表面光电化学制氢，而不直接接触电解质。这种结构的配置显示出显着的化学稳定性和阳极移动的起始电位，这表明在太阳能制氢的应用前景广阔。最大光子能量比达到15.6%。TiO 2/Pt/SiNW的转化效率
Si nanowire (SiNW) arrays decorated with Pt nanoparticles are passivated with TiO2 surface layer using atomic layer deposition (ALD). The sandwich structure TiO2/Pt/SiNW shows superior photoelectrochemical performance to the control planar silicon electrodes, especially under the concentrated solar radiation. Pt nanoparticles separated from aqueous electrolyte by TiO2 layer of more than 15 nm still well catalyze surface photoelectrochemical hydrogen production without direct contact to the electrolyte. This structural configuration shows remarkable chemical stability and anodically shifted onset potential, suggesting great promise for applications in solar hydrogen production. The maximum photon-to-energy reaches 15.6%. conversion efficiency of the TiO2/Pt/SiNW