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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) Published
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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
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Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-187000DOI: 10.1002/aenm.201502319ISI: 000374703900014Scopus ID: 2-s2.0-84957825094OAI: oai:DiVA.org:kth-187000DiVA: diva2:930690
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QC 20160525

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

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CiteExportLink to record
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Citation style
  • apa
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  • modern-language-association-8th-edition
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More styles
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  • de-DE
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