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Solar fuels photoanodes prepared by inkjet printing of copper vanadates

Newhouse, Paul and Boyd, David and Shinde, Aniketa and Guevarra, Dan and Zhou, Lan and Soedarmadji, Edwin and Li, Guo and Neaton, Jeffrey B. and Gregoire, John M. (2017) Solar fuels photoanodes prepared by inkjet printing of copper vanadates. In: 253rd American Chemical Society National Meeting & Exposition, April 2-6, 2017, San Francisco, CA. http://resolver.caltech.edu/CaltechAUTHORS:20170508-105609944

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Abstract

Widespread deployment of solar fuel generators requires the development of efficient and scalable functional materials, esp. for photoelectrocatalysis of the oxygen evolution reaction. Metal oxides comprise the most promising class of photoanode materials, but no known material meets the demanding photoelectrochem. 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 caldnation and rapid thermal processing, we characterize the phase behavior of the entire CuO-V2O5 compn. space for different thermal treatments via automated anal. of approx. 100 000 Raman spectra acquired using a novel Raman Imaging technique. These results enable the establishment of structure-property relationships for optical absorption and photoelectrochem. properties, revealing that highly active photoelectrocatalysts contg. alpha-Cu2V2O7 or alpha-CuV2O6 can be prepd. using scalable soln. processing techniques. An addnl. discovery results from the formation of an off-stoichiometric beta-Cu2V2O7 material that exhibits high photoelectroaclivity 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 alk. electrolytes.


Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription
https://www.acs.org/content/acs/en/meetings/spring-2017.htmlOrganizationConference Website
ORCID:
AuthorORCID
Shinde, Aniketa0000-0003-2386-3848
Gregoire, John M.0000-0002-2863-5265
Additional Information:© 2017 American Chemical Society.
Group:JCAP
Record Number:CaltechAUTHORS:20170508-105609944
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20170508-105609944
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77258
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:12 May 2017 22:58
Last Modified:12 May 2017 22:58

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