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Heazlewoodite, Ni[subscript 3]S[subscript 2]: A Potent Catalyst for Oxygen Reduction to Water under Benign Conditions

Author(s)
Falkowski, Joseph; Concannon, Nolan M.; Yan, Bing; Surendranath, Yogesh
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Alternative title
Heazlewoodite, Ni3S2: A Potent Catalyst for Oxygen Reduction to Water under Benign Conditions
Terms of use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
Electrodeposited thin films and nanoparticles of Ni[subscript 3]S[subscript 2] are highly active, poison- and corrosion-resistant catalysts for oxygen reduction to water at neutral pH. In pH 7 phosphate buffer, Ni[subscript 3]S[subscript 2] displays catalytic onset at 0.8 V versus the reversible hydrogen electrode, a Tafel slope of 109 mV decade[superscript –1], and high faradaic efficiency for four-electron reduction of O[subscript 2] to water. Under these conditions, the activity and stability of Ni[subscript 3]S[subscript 2] exceeds that of polycrystalline platinum and manganese, nickel, and cobalt oxides, illustrating the catalytic potential of pairing labile first-row transition metal active sites with a more covalent sulfide host lattice.
Date issued
2015-06
URI
http://hdl.handle.net/1721.1/103926
Department
Massachusetts Institute of Technology. Department of Chemistry
Journal
Journal of the American Chemical Society
Publisher
American Chemical Society (ACS)
Citation
Falkowski, Joseph M., Nolan M. Concannon, Bing Yan, and Yogesh Surendranath. “ Heazlewoodite, Ni[subscript 3]S[subscript 2] : A Potent Catalyst for Oxygen Reduction to Water Under Benign Conditions .” Journal of the American Chemical Society 137, no. 25 (July 2015): 7978–7981.
Version: Author's final manuscript
ISSN
0002-7863
1520-5126

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