Organic and Nanostructured Electronics Laboratory, Department of Electrical Engineering and Computer Science, 13-3138, Massachusetts Institute of Technology, Cambridge, USA
; Tel: +1 617 253 7012
Department of Chemistry, 6-335, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, USA
; Tel: +1 617 253 5537
Energy Environ. Sci., 2011,4, 2058-2061
23 Feb 2011,
11 Apr 2011
First published online
12 May 2011
Integrating chemical catalysts for water splitting with photoanode materials is a longstanding challenge in demonstrating light-assisted wateroxidation, a process which can be used for the generation of solar fuels. In this work we use a silicon photoanode as a substrate for processing cobalt metal films to form a cobalt-based wateroxidationcatalyst (Co–Pi) integrated with the silicon photoanode. The Co–Pi coated photoanodes show catalytic onset at 0.85 V under illumination, which is better than silicon photoanodes coated with ITO and solution-deposited Co–Pi (catalytic onset at 1.05 V) and significantly better photoanodes with only ITO contacts (catalytic activity onset at 1.6 V).
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Energy & Environmental Science
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