Electrocatalytic hydrogen evolution using amorphous tungsten phosphide nanoparticles

Creators: McEnaney, Joshua M.; Crompton, J. Chance; Callejas, Juan F.; Popczun, Eric J.; Read, Carlos G.; Lewis, Nathan S.; Schaak, Raymond E.

Abstract

Amorphous tungsten phosphide (WP), which has been synthesized as colloidal nanoparticles with an average diameter of 3 nm, has been identified as a new electrocatalyst for the hydrogen-evolution reaction (HER) in acidic aqueous solutions. WP/Ti electrodes produced current densities of −10 mA cm^(−2) and −20 mA cm^(−2) at overpotentials of only −120 mV and −140 mV, respectively, in 0.50 M H_2SO_4(aq).

Additional Information

© 2014 The Royal Society of Chemistry. Received 20th June 2014, Accepted 30th July 2014. First published online 30 Jul 2014. This work was supported at PSU by the National Science Foundation (NSF) Center for Chemical Innovation on Solar Fuels (CHE-1305124) and at Caltech by the Joint Center for Artificial Photosynthesis, a DOE Energy Innovation Hub, supported through the Office of Science of the U.S. Department of Energy under Award Number DE-SC0004993. TEM imaging was performed in the Penn State Microscopy and Cytometry Facility (University Park, PA) and HRTEM imaging, EDS spectra, XPS spectra, and DRIFTS spectra were acquired at the Materials Characterization Laboratory of the Penn State Materials Research Institute. J.M.M. thanks Jennifer Gray for assistance with analyzing the XPS spectra and Dr Thomas Gordon for assistance with quantitative yield experiments.

Attached Files

Published - c4cc04709e.pdf

Supplemental Material - c4cc04709e1.pdf

Files

c4cc04709e.pdf

Files (8.5 MB)

Name	Size	Download all
c4cc04709e.pdf md5:06ae6efceb1f1dc3e82d9de755f44ad6	2.0 MB	Preview Download
c4cc04709e1.pdf md5:7cb6049a183118690387372df0c954e8	6.5 MB	Preview Download

Additional details

	All versions	This version
Views	0	0
Downloads	0	0
Data volume	0 Bytes	0 Bytes