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3D Core-Shell NiFeCr Catalyst on a Cu Nanoarray for Water Oxidation: Synergy between Structural and Electronic Modulation
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry.
DUT, DUT KTH Joint Educ, Inst Artificial Photosynth, State Key Lab Fine Chem, Dalian 116024, Peoples R China.;DUT, Res Ctr Mol Devices, Dalian 116024, Peoples R China..
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry.ORCID iD: 0000-0002-4093-1251
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry.
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2018 (English)In: ACS ENERGY LETTERS, ISSN 2380-8195, Vol. 3, no 12, p. 2865-2874Article in journal (Refereed) Published
Abstract [en]

Low cost transition metal-based electrocatalysts for water oxidation and understanding their structure-activity relationship are greatly desired for clean and sustainable chemical fuel production. Herein, a core-shell (CS) NiFeCr metal/metal hydroxide catalyst was fabricated on a 3D Cu nanoarray by a simple electrodeposition-activation method. A synergistic promotion effect between electronic structure modulation and nanostructure regulation was presented on a CS-NiFeCr oxygen evolution reaction (OER) catalyst: the 3D nanoarchitecture facilitates the mass transport process, the in situ formed interface metal/metal hydroxide heterojunction accelerates the electron transfer, and the electronic structure modulation by Cr incorporation improves the reaction kinetics. Benefiting from the synergy between structural and electronic modulation, the catalyst shows excellent activity toward water oxidation under alkaline conditions: overpotential of 200 mV at 10 mA/cm(2) current density and Tafel slope of 28 mV/dec. This work opens up a new window for understanding the structure-activity relationship of OER catalysts and encourages new strategies for development of more advanced OER catalysts.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2018. Vol. 3, no 12, p. 2865-2874
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Chemical Sciences
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URN: urn:nbn:se:kth:diva-241005DOI: 10.1021/acsenergylett.8b01897ISI: 000453805100003Scopus ID: 2-s2.0-85056263175OAI: oai:DiVA.org:kth-241005DiVA, id: diva2:1276813
Note

QC 20190109

Available from: 2019-01-09 Created: 2019-01-09 Last updated: 2019-08-20Bibliographically approved

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Fan, LizhouZhang, BiaobiaoDaniel, QuentinTimmer, BrianZhang, FuguoSun, Licheng

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