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Ni–Mo Nanopowders for Efficient Electrochemical Hydrogen Evolution

McKone, James R. and Sadtler, Bryce F. and Werlang, Caroline A. and Lewis, Nathan S. and Gray, Harry B. (2013) Ni–Mo Nanopowders for Efficient Electrochemical Hydrogen Evolution. ACS Catalysis, 3 (2). pp. 166-169. ISSN 2155-5435. doi:10.1021/cs300691m.

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Earth-abundant metals are attractive alternatives to the noble metal composite catalysts that are used in water electrolyzers based on proton-exchange membrane technology. Ni–Mo alloys have been previously developed for the hydrogen evolution reaction (HER), but synthesis methods to date have been limited to formation of catalyst coatings directly on a substrate. We report a method for generating unsupported nanopowders of Ni–Mo, which can be suspended in common solvents and cast onto arbitrary substrates. The mass-specific catalytic activity under alkaline conditions approaches that of the most active reported non-noble HER catalysts, and the coatings display good stability under alkaline conditions. We have also estimated turnover frequencies per surface atom at various overpotentials and conclude that the activity enhancement for Ni–Mo relative to pure Ni is due to a combination of increased surface area and increased fundamental catalytic activity.

Item Type:Article
Related URLs:
URLURL TypeDescription
McKone, James R.0000-0001-6445-7884
Lewis, Nathan S.0000-0001-5245-0538
Gray, Harry B.0000-0002-7937-7876
Additional Information:© 2012 American Chemical Society. Received: October 26, 2012. Revised: November 30, 2012. Published: December 3, 2012. This work was supported by the National Science Foundation “Powering the Planet” Center for Chemical Innovation (CHE- 0802907). We thank Carol M. Garland for assistance with transmission electron microscopy. J.R.M. acknowledges the Department of Energy, Office of Science for a graduate research fellowship. C.A.W. thanks the Caltech Summer Undergraduate Research Fellowship (SURF) program for support during the summer of 2012. B.F.S. acknowledges the Beckman Institute for a postdoctoral fellowship.
Group:Kavli Nanoscience Institute, CCI Solar Fuels
Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
Caltech Summer Undergraduate Research Fellowship (SURF)UNSPECIFIED
Caltech Beckman InstituteUNSPECIFIED
Issue or Number:2
Record Number:CaltechAUTHORS:20130308-080802822
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Official Citation:Ni–Mo Nanopowders for Efficient Electrochemical Hydrogen Evolution James R. McKone, Bryce F. Sadtler, Caroline A. Werlang, Nathan S. Lewis, and Harry B. Gray ACS Catalysis20133 (2), 166-169
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37403
Deposited By: Tony Diaz
Deposited On:11 Apr 2013 19:55
Last Modified:09 Nov 2021 23:28

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