Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published February 2013 | Supplemental Material + Published
Journal Article Open

Ni–Mo Nanopowders for Efficient Electrochemical Hydrogen Evolution

Abstract

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.

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.

Attached Files

Published - cs300691m.pdf

Supplemental Material - cs300691m_si_001.pdf

Supplemental Material - cs300691m_si_002.xlsx

Files

cs300691m_si_001.pdf
Files (5.5 MB)
Name Size Download all
md5:967d5a6ea45d3ae0017c68880f7bf27c
1.7 MB Preview Download
md5:0b56e7d6979f353e5a9c36e4f659e24f
3.8 MB Preview Download
md5:ed8bcff911375c236f0c0157b96a59f9
14.4 kB Download

Additional details

Created:
August 19, 2023
Modified:
October 23, 2023