Discovery of New Oxygen Evolution Reaction Electrocatalysts by Combinatorial Investigation of the Ni–La–Co–Ce Oxide Composition Space
Abstract
We report a new family of earth-abundant electrocatalysts for the oxygen evolution reaction (OER) discovered via high-throughput screening of 1771 discrete metal oxide compositions covering the nickel–lanthanum–cobalt–cerium composition space. The catalytic performance of each of these compositions was measured under conditions applicable to distributed solar fuel generation using a three-electrode scanning-drop electrochemical cell. These high-throughput measurements show enhanced activity for catalyst compositions containing 20–65 metal atom % Ce. The catalytic activity and stability of a representative highly active composition (Ni_(0.1)La_(0.1)Co_(0.3)Ce_(0.5))O_x was verified by standard rotating-disc electrochemistry. Catalysts of this composition showed stable operational performance at 10 mA cm^(−2) for 2 h and survived a 100 h endurance test in a testbed electrolyzer.
Additional Information
© 2014 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. Received: May 21, 2014; Published online on July 22, 2014. This manuscript 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 Chris Karp for assistance with electrolyzer testbed Faradaic efficiency and headspace measurements; Natalie Becerra for preliminary SEM and EDS measurements; Martin Marcin for assistance with assembly of high throughput electrochemistry experiments; Karl Walczak for preparation of the NiMo cathode used in the testbed system; Slobodan Mitrovic and Manuel Soriaga for assistance with XPS; and the U. S. Army Research Laboratory for providing the anion exchange membrane used in the testbed system.Attached Files
Supplemental Material - celc_201402149_sm_miscellaneous_information.pdf
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Additional details
- Eprint ID
- 52215
- Resolver ID
- CaltechAUTHORS:20141201-102711064
- Department of Energy (DOE)
- DE-SC0004993
- Created
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2014-12-01Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field
- Caltech groups
- JCAP