A Cu-Based Nanoparticulate Film as Super-Active and Robust Catalyst Surpasses Pt for Electrochemical H-2 Production from Neutral and Weak Acidic Aqueous Solutions
Number of Authors: 6
2016 (English)In: Advanced Energy Materials, ISSN 1614-6832, Vol. 6, no 8, 1502319Article in journal (Refereed) Published
Electrocatalysts that are stable and highly active at low overpotential (eta) under mild conditions as well as cost-effective and scalable are eagerly desired for potential use in photo-and electro-driven hydrogen evolution devices. Here the fabrication and characterization of a super-active and robust Cu-CuxO-Pt nanoparticulate electrocatalyst is reported, which displays a small Tafel slope (44 mV dec(-1)) and a large exchange current density (1.601 mA cm(-2)) in neutral buffer solution. The catalytic current density of this catalyst film reaches 500 mA cm(-2) at eta = -390 +/- 12 mV and 20 mA cm(-2) at eta = -45 +/- 3 mV, which are significantly higher than the values displayed by Pt foil and Pt/C electrodes in neutral buffer solution and even comparable with the activity of Pt electrode in 0.5 M H2SO4 solution.
Place, publisher, year, edition, pages
2016. Vol. 6, no 8, 1502319
Chemical Sciences Materials Engineering Physical Sciences
IdentifiersURN: urn:nbn:se:su:diva-130870DOI: 10.1002/aenm.201502319ISI: 000374703900014OAI: oai:DiVA.org:su-130870DiVA: diva2:934199