https://scholars.lib.ntu.edu.tw/handle/123456789/390947
Title: | Heterostructure of Si and CoSe2: A Promising Photocathode Based on a Non-noble Metal Catalyst for Photoelectrochemical Hydrogen Evolution | Authors: | Basu, Mrinmoyee Zhang, Zhi-Wei CHIH-JUNG CHEN Chen, Po-Tzu Yang, Kai-Chih Ma, Chong-Geng Lin, Chun Che Hu, Shu-Fen Liu, Ru-Shi RU-SHI LIU |
Keywords: | cobalt selenide; hydrogen evolution; nanorods; semi-metals; water splitting | Issue Date: | 2015 | Journal Volume: | 54 | Journal Issue: | 21 | Start page/Pages: | 6211-6216 | Source: | Angewandte Chemie-International Edition | Abstract: | 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. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
URI: | http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000354260000016&KeyUID=WOS:000354260000016 http://scholars.lib.ntu.edu.tw/handle/123456789/390947 |
DOI: | 10.1002/anie.201502573 | SDG/Keyword: | Catalysts; Charge transfer; Electrochemical impedance spectroscopy; Metals; Nanorods; Photocathodes; Precious metals; Silicon; Solar power generation; Sulfide minerals; Charge transfer resistance; Cobalt selenide; Hydrogen evolution; Non-noble metal catalysts; Photoelectrochemical hydrogen; Reversible hydrogen electrodes; Water splitting; Water splitting reactions; Hydrogen production |
Appears in Collections: | 化學系 |
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