Hydrogen evolution on platinum-coated p-silicon photocathodes

被引：61
作者：
Maier, CU [1 ]
Specht, M [1 ]
Bilger, G [1 ]
机构：
[1] CTR SOLAR ENERGY & HYDROGEN RES,D-70565 STUTTGART,GERMANY
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 1996年 / 21卷 / 10期
关键词：
D O I：
10.1016/0360-3199(96)00023-7
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The influence of various surface morphologies of Pt-coated p-Si electrodes on the photoelectrochemical formation of hydrogen was investigated. To improve the electrocatalytic activity and the stability of monocrystalline p-type silicon electrodes different Pt films have been prepared by various deposition processes. The morphology, atomic concentration, and chemical binding states were analysed by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM), respectively. The surface structures of Pt-coated p-Si photocathodes, e.g. ultrathin Pt films or submonolayers prepared by physical vapour deposition (PVD) techniques or Pt island topographies formed by electrochemical processes, lead to specific photocurrent-voltage characteristics indicating that these surface structures can produce hydrogen with a high conversion efficiency. Since homogeneous Pt surface layers on p-Si yield ohmic contacts or low Schottky barrier heights more efficient structures are formed by Pt island topographies. Copyright (C) 1996 International Association for Hydrogen Energy
引用
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页码：859 / 864
页数：6
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