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Discovery of Fe–Ce Oxide/BiVO₄ Photoanodes through Combinatorial Exploration of Ni–Fe–Co–Ce Oxide Coatings

Shinde, Aniketa and Guevarra, Dan and Liu, Guiji and Sharp, Ian D. and Toma, Francesca M. and Gregoire, John M. and Haber, Joel A. (2016) Discovery of Fe–Ce Oxide/BiVO₄ Photoanodes through Combinatorial Exploration of Ni–Fe–Co–Ce Oxide Coatings. ACS Applied Materials & Interfaces, 8 (36). pp. 23696-23705. ISSN 1944-8244. doi:10.1021/acsami.6b06714.

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An efficient photoanode is a prerequisite for a viable solar fuels technology. The challenges to realizing an efficient photoanode include the integration of a semiconductor light absorber and a metal oxide electrocatalyst to optimize corrosion protection, light trapping, hole transport, and photocarrier recombination sites. To efficiently explore metal oxide coatings, we employ a high-throughput methodology wherein a uniform BiVO₄ film is coated with 858 unique metal oxide coatings covering a range of metal oxide loadings and the full (Ni–Fe–Co–Ce)Oₓ pseudoquaternary composition space. Photoelectrochemical characterization of the photoanodes reveals that specific combinations of metal oxide composition and loading provide up to a 13-fold increase in the maximum photoelectrochemical power generation for oxygen evolution in pH 13 electrolyte. Through mining of the high-throughput data we identify composition regions that form improved interfaces with BiVO₄. Of particular note, integrated photoanodes with catalyst compositions in the range Fe_((0.4–0.6))Ce_((0.6–0.4))Oₓ exhibit high interface quality and excellent photoelectrochemical power conversion. Scaled-up inkjet-printed electrodes and photoanodic electrodeposition of this composition on BiVO₄ confirms the discovery and the synthesis-independent interface improvement of (Fe–Ce)Oₓ coatings on BiVO₄.

Item Type:Article
Related URLs:
URLURL TypeDescription Information
Shinde, Aniketa0000-0003-2386-3848
Guevarra, Dan0000-0002-9592-3195
Liu, Guiji0000-0002-3943-4119
Sharp, Ian D.0000-0001-5238-7487
Toma, Francesca M.0000-0003-2332-0798
Gregoire, John M.0000-0002-2863-5265
Haber, Joel A.0000-0001-7847-5506
Additional Information:© 2016 American Chemical Society. Received: June 5, 2016. Accepted: August 23, 2016. Publication Date (Web): August 23, 2016. This material is based upon work performed by the Joint Center for Artificial Photosynthesis, a DOE Energy Innovation Hub, supported through the Office of Science of the U.S. Department of Energy (Award No. DE-SC0004993). Author Contributions: A.S. and D.G. contributed equally to this work. he authors declare no competing financial interest.
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0004993
Subject Keywords:high-throughput experimentation; materials integration; oxygen evolution reaction; photoanode; solar fuels
Issue or Number:36
Record Number:CaltechAUTHORS:20160907-090003256
Persistent URL:
Official Citation:Discovery of Fe–Ce Oxide/BiVO4 Photoanodes through Combinatorial Exploration of Ni–Fe–Co–Ce Oxide Coatings Aniketa Shinde, Dan Guevarra, Guiji Liu, Ian D. Sharp, Francesca M. Toma, John M. Gregoire, and Joel A. Haber ACS Applied Materials & Interfaces 2016 8 (36), 23696-23705 DOI: 10.1021/acsami.6b06714
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:70185
Deposited By: Ruth Sustaita
Deposited On:07 Sep 2016 18:57
Last Modified:26 Apr 2022 17:33

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