Release Time:2019-03-13  Hits:

Indexed by: Journal Article

Date of Publication: 2016-04-20

Journal: ADVANCED ENERGY MATERIALS

Included Journals: SCIE、EI

Volume: 6

Issue: 8

ISSN: 1614-6832

Abstract: 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.