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Enhanced Stability and Activity for Water Oxidation in Alkaline Media with Bismuth Vanadate Photoelectrodes Modified with a Cobalt Oxide Catalytic Layer Produced by Atomic Layer Deposition

Lichterman, Michael F. and Shaner, Matthew R. and Handler, Sheila G. and Brunschwig, Bruce S. and Gray, Harry B. and Lewis, Nathan S. and Spurgeon, Joshua M. (2013) Enhanced Stability and Activity for Water Oxidation in Alkaline Media with Bismuth Vanadate Photoelectrodes Modified with a Cobalt Oxide Catalytic Layer Produced by Atomic Layer Deposition. Journal of Physical Chemistry Letters, 4 (23). pp. 4188-4191. ISSN 1948-7185. https://resolver.caltech.edu/CaltechAUTHORS:20140110-084420760

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Abstract

Atomic-layer deposition (ALD) of thin layers of cobalt oxide on n-type BiVO_4 produced photoanodes capable of water oxidation with essentially 100% faradaic efficiency in alkaline, pH = 13 electrolytes. By contrast, under the same operating conditions, BiVO_4 photoanodes without the Co oxide catalytic layer exhibited lower faradaic yields, of ca. 70%, for O_2 evolution and were unstable, becoming rapidly photopassivated. High numbers (>25) of ALD cycles of Co oxide deposition gave electrodes that displayed poor photoelectrochemical behavior, but 15–20 ALD cycles produced Co oxide overlayers ~1 nm in thickness, with the resulting photoelectrodes exhibiting a stable photocurrent density of 1.49 mA cm^(–2) at the oxygen-evolution potential and an open-circuit potential of 0.404 V versus the reversible hydrogen electrode, under 100 mW cm^(–2) of simulated air mass 1.5 illumination.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/jz4022415 DOIArticle
http://pubs.acs.org/doi/abs/10.1021/jz4022415PublisherArticle
ORCID:
AuthorORCID
Lichterman, Michael F.0000-0002-0710-7068
Shaner, Matthew R.0000-0003-4682-9757
Brunschwig, Bruce S.0000-0002-6135-6727
Gray, Harry B.0000-0002-7937-7876
Lewis, Nathan S.0000-0001-5245-0538
Spurgeon, Joshua M.0000-0002-2987-0865
Additional Information:© 2013 American Chemical Society. Received: October 16, 2013; Accepted: November 21, 2013; Published: November 21, 2013. This work was supported through the Office of Science of the U.S. Department of Energy under award DE-SC0004993 to the Joint Center for Artificial Photosynthesis, a DOE Energy Innovation Hub. XPS and AFM data were collected at the Molecular Materials Research Center of the Beckman Institute of the California Institute of Technology. We thank Dr. Ragip Pala for helpful discussions.
Group:JCAP
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0004993
Issue or Number:23
Record Number:CaltechAUTHORS:20140110-084420760
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140110-084420760
Official Citation:Enhanced Stability and Activity for Water Oxidation in Alkaline Media with Bismuth Vanadate Photoelectrodes Modified with a Cobalt Oxide Catalytic Layer Produced by Atomic Layer Deposition Michael F. Lichterman, Matthew R. Shaner, Sheila G. Handler, Bruce S. Brunschwig, Harry B. Gray, Nathan S. Lewis, and Joshua M. Spurgeon The Journal of Physical Chemistry Letters 2013 4 (23), 4188-4191
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:43303
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:10 Jan 2014 17:32
Last Modified:09 Mar 2020 13:19

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