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Discovery of New Oxygen Evolution Reaction Electrocatalysts by Combinatorial Investigation of the Ni–La–Co–Ce Oxide Composition Space

Haber, Joel A. and Guevarra, Dan and Jung, Suho and Jin, Jian and Gregoire, John M. (2014) Discovery of New Oxygen Evolution Reaction Electrocatalysts by Combinatorial Investigation of the Ni–La–Co–Ce Oxide Composition Space. ChemElectroChem, 1 (10). pp. 1613-1617. ISSN 2196-0216. http://resolver.caltech.edu/CaltechAUTHORS:20141201-102711064

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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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/celc.201402149DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/celc.201402149/abstractPublisherArticle
http://onlinelibrary.wiley.com/doi/10.1002/celc.201402149/suppinfoPublisherSupporting Information
ORCID:
AuthorORCID
Jung, Suho0000-0002-8119-3902
Gregoire, John M.0000-0002-2863-5265
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.
Group:JCAP
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0004993
Subject Keywords:combinatorial chemistry; electrochemistry; heterogeneous catalysis; oxygen evolution reaction; solar fuels
Record Number:CaltechAUTHORS:20141201-102711064
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141201-102711064
Official Citation:Haber, J. A., Guevarra, D., Jung, S., Jin, J. and Gregoire, J. M. (2014), Discovery of New Oxygen Evolution Reaction Electrocatalysts by Combinatorial Investigation of the Ni–La–Co–Ce Oxide Composition Space. CHEMELECTROCHEM, 1: 1613–1617. doi: 10.1002/celc.201402149
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52215
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:01 Dec 2014 19:33
Last Modified:11 Apr 2017 17:13

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