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Ultrathin amorphous cobalt-vanadium hydr(oxy)oxide catalysts for the oxygen evolution reaction
Beihang Univ, Beijing Adv Innovat Ctr Biomed Engn, Sch Chem, Beijing 100191, Peoples R China..
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Theoretical Chemistry and Biology.ORCID iD: 0000-0001-6994-9802
Beihang Univ, Beijing Adv Innovat Ctr Biomed Engn, Sch Chem, Beijing 100191, Peoples R China..
Beihang Univ, Beijing Adv Innovat Ctr Biomed Engn, Sch Chem, Beijing 100191, Peoples R China..
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2018 (English)In: Energy & Environmental Science, ISSN 1754-5692, E-ISSN 1754-5706, Vol. 11, no 7, p. 1736-1741Article in journal (Refereed) Published
Abstract [en]

Cost efficient and long-term stable catalysts are in great demand for the oxygen evolution reaction (OER), a key process involved in water splitting cells and metal-air batteries. Here, we demonstrate that the ultrathin amorphous cobalt-vanadium hydr(oxy)oxide we synthesized is a highly promising electrocatalytic material for the OER with a low overpotential of 0.250 V (even lower down to 0.215 V when supported on Au foam) at 10 mA cm(-2) and a long stable operation time (170 h) in alkaline media. In combination with in situ X-ray absorption spectral characterization and first-principles simulations, we reveal that the ultrathin, amorphous and alloyed structural characteristics have enabled its facile transformation to the desirable active phase, leading to a dramatically enhanced catalytic activity. Our finding highlights the remarkable advantages of the two-dimensional amorphous material and sheds new light on the design of high-performance electrocatalysts.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2018. Vol. 11, no 7, p. 1736-1741
National Category
Chemical Sciences
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URN: urn:nbn:se:kth:diva-232621DOI: 10.1039/c8ee00611cISI: 000438392400008Scopus ID: 2-s2.0-85050152583OAI: oai:DiVA.org:kth-232621DiVA, id: diva2:1235998
Note

QC 20180730

Available from: 2018-07-30 Created: 2018-07-30 Last updated: 2019-08-20Bibliographically approved

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Ji, YongfeiLuo, Yi

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