NDLI: Solar fuel photoanodes prepared by inkjet printing of copper vanadates

Content Provider	Royal Society of Chemistry (RSC)
Author	Newhouse, P. F. Shinde, A. Soedarmadji, E. Li, G. Guevarra, D. Gregoire, J. M. Boyd, D. A. Zhou, L. Neaton, J. B.
Copyright Year	2016
Abstract	Widespread deployment of solar fuel generators requires the development of efficient and scalable functional materials, especially for photoelectrocatalysis of the oxygen evolution reaction. Metal oxides comprise the most promising class of photoanode materials, but no known material meets the demanding photoelectrochemical requirements. Copper vanadates have recently been identified as a promising class of photoanode materials with several phases exhibiting an indirect band gap near 2 eV and stable photoelectrocatalysis of the oxygen evolution reaction in a pH 9.2 electrolyte. By employing combinatorial inkjet printing of metal precursors and applying both calcination and rapid thermal processing, we characterize the phase behaviour of the entire CuO–V2O5 composition space for different thermal treatments via automated analysis of approximately 100 000 Raman spectra acquired using a novel Raman imaging technique. These results enable the establishment of structure–property relationships for optical absorption and photoelectrochemical properties, revealing that highly active photoelectrocatalysts containing α-Cu2V2O7 or α-CuV2O6 can be prepared using scalable solution processing techniques. An additional discovery results from the formation of an off-stoichiometric β-Cu2V2O7 material that exhibits high photoelectroactivity in the presence of a ferri/ferrocyanide redox couple with excellent stability in a pH 13 electrolyte, demonstrating that copper vanadates may be viable photoanodes in strong alkaline electrolytes.
Starting Page	7483
Ending Page	7494
Page Count	12
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	4
Issue Number	19
Journal	Journal of Materials Chemistry A
DOI	10.1039/c6ta01252c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Solar fuel Oxygen evolution Photoelectrochemical cell Band gap Electronvolt PH Electrolyte Combinatorics Inkjet printing Calcination Ferrocyanide Redox Copper
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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