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A Cu-Based Nanoparticulate Film as Super-Active and Robust Catalyst Surpasses Pt for Electrochemical H2 Production from Neutral and Weak Acidic Aqueous Solutions
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
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2016 (English)In: Advanced Energy Materials, ISSN 1614-6832, Vol. 6, no 8, 1502319Article in journal (Refereed) PublishedText
Abstract [en]

Electrocatalysts that are stable and highly active at low overpotential (η) 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 η = -390 ± 12 mV and 20 mA cm-2 at η = -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
Wiley-VCH Verlagsgesellschaft, 2016. Vol. 6, no 8, 1502319
Keyword [en]
copper, electrocatalysts, electrolysis, hydrogen production, water reduction, Catalysts, Cost effectiveness, Electrodes, Platinum, Solutions, Acidic aqueous solution, Buffer solutions, Catalytic current, Exchange current densities, Fabrication and characterizations, Hydrogen evolution, Nano particulates
National Category
Chemical Sciences
URN: urn:nbn:se:kth:diva-187000DOI: 10.1002/aenm.201502319ISI: 000374703900014ScopusID: 2-s2.0-84957825094OAI: diva2:930690

QC 20160525

Available from: 2016-05-25 Created: 2016-05-16 Last updated: 2016-06-08Bibliographically approved

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Chen, HongSun, Licheng
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Organic Chemistry
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