期刊
NANOSCALE
卷 9, 期 17, 页码 5413-5424出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7nr00216e
关键词
-
类别
资金
- Institute for Basic Science (IBS) in the Republic of Korea [IBS-R006-G1]
- National Research Foundation of Korea [2016 M3D1A1021142]
- echnology Development Program to Solve Climate Changes of NRF - Ministry of Science, ICT & Future Planning of Korea [2015 M1A2A2074688]
- Basic Science Research Program through National Research Foundation (NRF) of Korea [2014R1A2A1A11052513]
Photoelectrochemical (PEC) cells are promising tools for renewable and sustainable solar energy conversion. Currently, their inadequate performance and high cost of the noble metals used in the electrocatalytic counter electrode have postponed the practical use of PEC cells. In this study, we report the electrochemical synthesis of nanoporous tungsten carbide and its application as a reduction catalyst in PEC cells, namely, dye-sensitized solar cells (DSCs) and PEC water splitting cells, for the first time. The method employed in this study involves the anodization of tungsten foil followed by post heat treatment in a CO atmosphere to produce highly crystalline tungsten carbide film with an interconnected nanostructure. This exhibited high catalytic activity for the reduction of cobalt bipyridine species, which represent state-of-the-art redox couples for DSCs. The performance of tungsten carbide even surpassed that of Pt, and a substantial increase (similar to 25%) in energy conversion efficiency was achieved when Pt was substituted by tungsten carbide film as the counter electrode. In addition, tungsten carbide displayed decent activity as a catalyst for the hydrogen evolution reaction, suggesting the high feasibility for its utilization as a cathode material for PEC water splitting cells, which was also verified in a two-electrode water photoelectrolyzer.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据