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Discovering Ce-rich oxygen evolution catalysts, from high throughput screening to water electrolysis

Haber, Joel A. and Cai, Yun and Jung, Suho and Xiang, Chengxiang and Mitrovic, Slobodan and Jin, Jian and Bell, Alexis T. and Gregoire, John M. (2014) Discovering Ce-rich oxygen evolution catalysts, from high throughput screening to water electrolysis. Energy and Environmental Science, 7 (2). pp. 682-688. ISSN 1754-5692. doi:10.1039/C3EE43683G.

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We report a new Ce-rich family of active oxygen evolution reaction (OER) catalysts composed of earth abundant elements, discovered using high-throughput methods. High resolution inkjet printing was used to produce 5456 discrete oxide compositions containing the elements nickel, iron, cobalt and cerium. The catalytic performance of each of these compositions was measured under conditions applicable to distributed solar fuels generation using a three-electrode scanning drop electrochemical cell. The catalytic activity and stability of representative compositions (Ni_(0.5)Fe_(0.3)Co_(0.17)Ce_(0.03)O_x and Ni_(0.3)Fe^(0.07)Co_(0.2)Ce_(0.43)O_x) from 2 distinct regions were verified by resynthesizing these compositions on glassy carbon rods for electrochemical testing. The activity of the new Ce-rich catalysts was further verified using an unrelated synthetic method to electrodeposit a pseudo-ternary composition Ni_(0.2)Co_(0.3)Ce_(0.5)O_x, which produced a catalyst with 10 mA cm^(−2) oxygen evolution current at 310 mV overpotential. The unique Tafel behavior of these Ce-rich catalysts affords the opportunity for further improvement.

Item Type:Article
Related URLs:
URLURL TypeDescription
Haber, Joel A.0000-0001-7847-5506
Jung, Suho0000-0002-8119-3902
Xiang, Chengxiang0000-0002-1698-6754
Mitrovic, Slobodan0000-0001-8913-8505
Bell, Alexis T.0000-0002-5738-4645
Gregoire, John M.0000-0002-2863-5265
Additional Information:© 2014 Royal Society of Chemistry. Received 9th November 2013. Accepted 3rd January 2014. 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). The authors thank Charles McCrory for assistance with acquisition, analysis and interpretation of traditional electrochemistry on rotating disc electrodes; Dan Guevarra for assistance with high throughput electrochemistry experiments; Paul Newhouse for assistance with preparation of glassy carbon rods for printing; William West and Chris Karp for assistance with electrolyzer testbed faradaic efficiency and headspace measurements; Martin Marcin for assistance with assembly of high throughput electrochemistry experiments; the Microanalytical Center in the College of Chemistry, UC Berkeley for ICP-OES measurements; Karl Walczak for preparation of the NiMo cathode used in the testbed system; and the U. S. Army Research Laboratory for providing the anion exchange membrane used in the testbed system.
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0004993
Issue or Number:2
Record Number:CaltechAUTHORS:20140325-130923791
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Official Citation:Discovering Ce-rich oxygen evolution catalysts, from high throughput screening to water electrolysis Joel A. Haber, Yun Cai, Suho Jung, Chengxiang Xiang, Slobodan Mitrovic, Jian Jin, Alexis T. Bell and John M. Gregoire Energy Environ. Sci., 2014, 7, 682-688 DOI: 10.1039/C3EE43683G
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:44502
Deposited By: Ruth Sustaita
Deposited On:01 Apr 2014 23:14
Last Modified:10 Nov 2021 16:52

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