Discovery of New Oxygen Evolution Reaction Electrocatalysts by Combinatorial Investigation of the Ni-La-Co-Ce Oxide Composition Space
- California Inst. of Technology (CalTech), Pasadena, CA (United States). Joint Center for Artificial Photosynthesis (JCAP); Joint Center for Artificial Photosynthesis
- California Inst. of Technology (CalTech), Pasadena, CA (United States). Joint Center for Artificial Photosynthesis (JCAP)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Joint Center for Artificial Photosynthesis (JCAP) and Engineering Division
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 fuels 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 (Ni0.1La0.1Co0.3Ce0.5)Ox 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.
- Research Organization:
- California Inst. of Technology (CalTech), Pasadena, CA (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Contributing Organization:
- US Army Research Laboratory (USARL)
- Grant/Contract Number:
- SC0004993
- OSTI ID:
- 1468650
- Alternate ID(s):
- OSTI ID: 1471245
- Journal Information:
- ChemElectroChem, Journal Name: ChemElectroChem Journal Issue: 10 Vol. 1; ISSN 2196-0216
- Publisher:
- ChemPubSoc EuropeCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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