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An Operando Investigation of (Ni-Fe-Co-Ce)O_x System as Highly Efficient Electrocatalyst for Oxygen Evolution Reaction

Favaro, Marco and Drisdell, Walter S. and Marcus, Matthew A. and Gregoire, John M. and Crumlin, Ethan J. and Haber, Joel A. and Yano, Junko (2017) An Operando Investigation of (Ni-Fe-Co-Ce)O_x System as Highly Efficient Electrocatalyst for Oxygen Evolution Reaction. ACS Catalysis, 7 (2). pp. 1248-1258. ISSN 2155-5435. https://resolver.caltech.edu/CaltechAUTHORS:20170104-105146889

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Abstract

The oxygen evolution reaction (OER) is a critical component of industrial processes such as electrowinning of metals and the chlor-alkali process. It also plays a central role in the developing renewable energy field of solar-fuels generation by providing both the protons and electrons needed to generate fuels such as H_2 or reduced hydrocarbons from CO_2. To improve these processes, it is necessary to expand the fundamental understanding of catalytically active species at low overpotential, which will further the development of novel electrocatalysts with high activity and durability. In this context, performing experimental investigations of the electrocatalysts under realistic working regimes, i.e. under operando conditions, is of crucial importance. Here, we study a highly active quinary transition metal oxide-based OER electrocatalyst by means of operando ambient pressure X-ray photoelectron spectroscopy and X-ray absorption spectroscopy performed at the solid/liquid interface. We observe that the catalyst undergoes a clear chemical-structural evolution as a function of the applied potential with Ni, Fe and Co oxy-hydroxides comprising the active catalytic species. While CeO_2 is redox inactive under catalytic conditions, its influence on the redox processes of the transition metals boosts the catalytic activity at low overpotentials, introducing an important design principle for the optimization of electrocatalysts and tailoring of novel materials.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/acscatal.6b03126DOIArticle
http://pubs.acs.org/doi/abs/10.1021/acscatal.6b03126PublisherArticle
http://pubs.acs.org/doi/suppl/10.1021/acscatal.6b03126PublisherSupporting Information
ORCID:
AuthorORCID
Drisdell, Walter S.0000-0002-8693-4562
Gregoire, John M.0000-0002-2863-5265
Crumlin, Ethan J.0000-0003-3132-190X
Haber, Joel A.0000-0001-7847-5506
Yano, Junko0000-0001-6308-9071
Additional Information:© 2016 American Chemical Society. Publication Date (Web): December 27, 2016. We thank Dan Guevarra for his assistance collecting the cyclic voltamograms shown in Figure 1, using the scanning drop electrochemical cell. 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 XAS work was done at BL 10.3.2 at the Advanced Light Source, and at BL 7-3 at the Stanford Synchrotron Radiation Lightsource. The AP-XPS work was done at BL 9.3.1 at the Advanced Light Source. Use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515. The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. These two authors equally contributed to the work (M.F. and W.S.D.). The authors declare no competing financial interest.
Group:JCAP
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0004993
Department of Energy (DOE)DE-AC02-76SF00515
Department of Energy (DOE)DE-AC02-05CH11231
Subject Keywords:Oxygen evolution reaction (OER), transiton metal oxides, operando techniques, ambient pressure, catalytic conditions, synchrotron radiation, electron spectroscopies
Issue or Number:2
Record Number:CaltechAUTHORS:20170104-105146889
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170104-105146889
Official Citation:An Operando Investigation of (Ni–Fe–Co–Ce)Ox System as Highly Efficient Electrocatalyst for Oxygen Evolution Reaction Marco Favaro, Walter S. Drisdell, Matthew A. Marcus, John M. Gregoire, Ethan J. Crumlin, Joel A. Haber, and Junko Yano ACS Catalysis 2017 7 (2), 1248-1258 DOI: 10.1021/acscatal.6b03126
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:73203
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:04 Jan 2017 19:00
Last Modified:09 Oct 2019 04:29

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