Powdered MnySb1-yOx Catalysts for Cerium- Mediated Oxygen Evolution in Acidic Environments

Zachary P. Ifkovits; Jake M. Evans; Paul A. Kempler; Maureen B. Morla; Kim H. Pham; Jacqueline A. Dowling; Azhar I. Carim; Nathan S. Lewis

doi:10.1021/acsenergylett.2c01754

Journal article

Powdered MnySb1-yOx Catalysts for Cerium- Mediated Oxygen Evolution in Acidic Environments

Zachary P. Ifkovits, Jake M. Evans, Paul A. Kempler, Maureen B. Morla, Kim H. Pham, Jacqueline A. Dowling, Azhar I. Carim and Nathan S. Lewis

ACS energy letters, Vol.7(12), pp.4258-4264

12/09/2022

DOI: 10.1021/acsenergylett.2c01754

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Abstract

MnySb1-yOx powders with a series of compositions were evaluated as catalysts for chemical water oxidation in aqueous perchloric, sulfuric, or methanesulfonic acid. O2(g) evolved spontaneously over MnySb1-yOx catalyst powders that had been suspended in solutions that were pre-loaded with Ce4+ ions. The rate of O2 evolution depended on the amount, as well as the oxidation state, of the Mn in the powder. The highest O2 evolution rate was observed from the most Mn-rich catalyst, which had an effective surface oxidation state of Mn2.9+ in its rest state. The facile synthetic accessibility of such catalysts in powder form constitutes a step toward replacing Ir or Ru in Cemediated oxygen evolution in decoupled water splitting systems, as well as toward developing inks of earth-abundant catalysts for preparation of catalyst-coated membranes used in conventional proton-exchange membrane electrolyzers.

Chemistry

Chemistry, Physical

Electrochemistry

Energy & Fuels

Materials Science

Materials Science, Multidisciplinary

Nanoscience & Nanotechnology

Physical Sciences

Science & Technology

Science & Technology - Other Topics

Technology

Details

Title: Subtitle: Powdered MnySb1-yOx Catalysts for Cerium- Mediated Oxygen Evolution in Acidic Environments
Creators: Zachary P. Ifkovits - California Institute of Technology
Jake M. Evans - California Institute of Technology
Paul A. Kempler - California Institute of Technology
Maureen B. Morla - California Institute of Technology
Kim H. Pham - California Institute of Technology
Jacqueline A. Dowling - California Institute of Technology
Azhar I. Carim - California Institute of Technology
Nathan S. Lewis - California Institute of Technology
Resource Type: Journal article
Publication Details: ACS energy letters, Vol.7(12), pp.4258-4264
DOI: 10.1021/acsenergylett.2c01754
ISSN: 2380-8195
eISSN: 2380-8195
Publisher: Amer Chemical Soc
Number of pages: 7
Grant note: DE- SC0004993 / Office of Science of the U.S. Department of Energy (DOE); United States Department of Energy (DOE) DE- SC0022087 / DOE Energy Innovation Hub; United States Department of Energy (DOE) Basic Energy Sciences Office of the DOE; United States Department of Energy (DOE) DE-SC0022087 / U.S. Department of Energy (DOE); United States Department of Energy (DOE)
Language: English
Date published: 12/09/2022
Academic Unit: Civil and Environmental Engineering
Record Identifier: 9985112882902771

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