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Title: Crystalline Nickel, Cobalt, and Manganese Antimonates as Electrocatalysts for the Chlorine Evolution Reaction

Abstract

The chlorine-evolution reaction (CER) is a common, commercially valuable electrochemical reaction, and is practiced at industrial scale globally. A precious metal solid solution of RuO2 or IrO2 with TiO2 is the predominant electrocatalyst for the CER. Herein we report that materials comprised only of non-precious metal elements, specifically crystalline transition-metal antimonates (TMAs) such as NiSb2Ox, CoSb2Ox, and MnSb2Ox, are moderately active, stable catalysts for the electrochemical oxidation of chloride to chlorine under conditions relevant to the commercial chlor-alkali process. Specifically, CoSb2Ox exhibited a galvanostatic potential of 1.804 V vs. NHE at 100 mA cm–2 of Cl2(g) production from aqueous pH = 2.0, 4.0 M NaCl after 250 h of operation. In this work, studies of the bulk and surface of the electrocatalyst and the composition of the electrolyte before and after electrolysis indicated minimal changes in the surface structure and intrinsic activity of CoSb2Ox as a result of Cl2(g) evolution under these conditions.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. California Institute of Technology (CalTech), Pasadena, CA (United States)
Publication Date:
Research Org.:
California Institute of Technology (CalTech), Pasadena, CA (United States). Joint Center for Artificial Photosynthesis (JCAP)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF)
OSTI Identifier:
1610784
Alternate Identifier(s):
OSTI ID: 1500144
Grant/Contract Number:  
SC0004993; DGE-1144469
Resource Type:
Accepted Manuscript
Journal Name:
Energy & Environmental Science
Additional Journal Information:
Journal Volume: 12; Journal Issue: 4; Journal ID: ISSN 1754-5692
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Chemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology

Citation Formats

Moreno-Hernandez, Ivan A., Brunschwig, Bruce S., and Lewis, Nathan S. Crystalline Nickel, Cobalt, and Manganese Antimonates as Electrocatalysts for the Chlorine Evolution Reaction. United States: N. p., 2019. Web. doi:10.1039/c8ee03676d.
Moreno-Hernandez, Ivan A., Brunschwig, Bruce S., & Lewis, Nathan S. Crystalline Nickel, Cobalt, and Manganese Antimonates as Electrocatalysts for the Chlorine Evolution Reaction. United States. https://doi.org/10.1039/c8ee03676d
Moreno-Hernandez, Ivan A., Brunschwig, Bruce S., and Lewis, Nathan S. Tue . "Crystalline Nickel, Cobalt, and Manganese Antimonates as Electrocatalysts for the Chlorine Evolution Reaction". United States. https://doi.org/10.1039/c8ee03676d. https://www.osti.gov/servlets/purl/1610784.
@article{osti_1610784,
title = {Crystalline Nickel, Cobalt, and Manganese Antimonates as Electrocatalysts for the Chlorine Evolution Reaction},
author = {Moreno-Hernandez, Ivan A. and Brunschwig, Bruce S. and Lewis, Nathan S.},
abstractNote = {The chlorine-evolution reaction (CER) is a common, commercially valuable electrochemical reaction, and is practiced at industrial scale globally. A precious metal solid solution of RuO2 or IrO2 with TiO2 is the predominant electrocatalyst for the CER. Herein we report that materials comprised only of non-precious metal elements, specifically crystalline transition-metal antimonates (TMAs) such as NiSb2Ox, CoSb2Ox, and MnSb2Ox, are moderately active, stable catalysts for the electrochemical oxidation of chloride to chlorine under conditions relevant to the commercial chlor-alkali process. Specifically, CoSb2Ox exhibited a galvanostatic potential of 1.804 V vs. NHE at 100 mA cm–2 of Cl2(g) production from aqueous pH = 2.0, 4.0 M NaCl after 250 h of operation. In this work, studies of the bulk and surface of the electrocatalyst and the composition of the electrolyte before and after electrolysis indicated minimal changes in the surface structure and intrinsic activity of CoSb2Ox as a result of Cl2(g) evolution under these conditions.},
doi = {10.1039/c8ee03676d},
journal = {Energy & Environmental Science},
number = 4,
volume = 12,
place = {United States},
year = {Tue Mar 12 00:00:00 EDT 2019},
month = {Tue Mar 12 00:00:00 EDT 2019}
}

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Works referencing / citing this record:

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Electrochemical performance of antimony/chlorine-incorporated nickel foam
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In situ electrochemical oxidation of electrodeposited Ni-based nanostructure promotes alkaline hydrogen production
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