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Highly Active Three-Dimensional NiFe/Cu2O Nanowires/Cu Foam Electrode for Water Oxidation
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry. Dalian Univ Technol, Peoples R China.ORCID iD: 0000-0002-4521-2870
2017 (English)In: ChemSusChem, ISSN 1864-5631, E-ISSN 1864-564X, Vol. 10, no 7, 1475-1481 p.Article in journal (Refereed) Published
Abstract [en]

Water splitting is of paramount importance for exploiting renewable energy-conversion and -storage systems, but is greatly hindered by the kinetically sluggish oxygen evolution reaction (OER). In this work, a three-dimensional, highly efficient, and durable NiFe/Cu2O nanowires/Cu foam anode (NiFe/Cu2O NWs/CF) for water oxidation in 1.0m KOH was developed. The obtained electrode exhibited a current density of 10mAcm(-2) at a uniquely low overpotential of =215mV. The average specific current density (j(s)) was estimated, on the basis of the electrocatalytically active surface area, to be 0.163mAcm(-2) at =310mV. The electrode also displayed a low Tafel slope of 42mVdecade(-1). Moreover, the NiFe/Cu2O NWs/CF electrode could maintain a steady current density of 100mAcm(-2) for 50h at an overpotential of =260mV. The outstanding electrochemical performance of the electrode for the OER was attributed to the high conductivity of the Cu foam and the specific structure of the electrode with a large interfacial area.

Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2017. Vol. 10, no 7, 1475-1481 p.
Keyword [en]
copper, electrocatalysis, electrochemistry, nanowires, oxidation, water chemistry
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-208248DOI: 10.1002/cssc.201601884ISI: 000398838600024PubMedID: 28101949Scopus ID: 2-s2.0-85017329427OAI: oai:DiVA.org:kth-208248DiVA: diva2:1114926
Funder
Swedish Energy AgencyKnut and Alice Wallenberg Foundation
Note

QC 20170626

Available from: 2017-06-26 Created: 2017-06-26 Last updated: 2017-06-30Bibliographically approved

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