Heterostructure of Si and CoSe2: A promising photocathode based on a non-noble metal catalyst for photoelectrochemical hydrogen evolution

Mrinmoyee Basu, Zhi Wei Zhang, Chih Jung Chen, Po Tzu Chen, Kai Chih Yang, Chong Geng Ma, Chun Che Lin, Shu Fen Hu, Ru Shi Liu

研究成果: 雜誌貢獻文章

94 引文 斯高帕斯(Scopus)

摘要

Development of a solar water splitting device requires design of a low-cost, efficient, and non-noble metal compound as alternative to noble metals. For the first time, we showed that CoSe2 can function as co-catalyst in phototoelectrochemical hydrogen production. We designed a heterostructure of p-Si and marcasite-type CoSe2 for solar-driven hydrogen production. CoSe2 successively coupled with p-Si can act as a superior photocathode in the solar-driven water splitting reaction. Photocurrents up to 9 mA cm-2 were achieved at 0 V vs. reversible hydrogen electrode. Electrochemical impedance spectroscopy showed that the high photocurrents can be attributed to low charge transfer resistance between the Si and CoSe2 interfaces and that between the CoSe2 and electrolyte interfaces. Our results suggest that this CoSe2 is a promising alternative co-catalyst for hydrogen evolution.
原文英語
頁(從 - 到)6211-6216
頁數6
期刊Angewandte Chemie - International Edition
54
發行號21
DOIs
出版狀態已發佈 - 五月 18 2015
對外發佈Yes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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