Journal
JOURNAL OF CATALYSIS
Volume 369, Issue -, Pages 105-110Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2018.10.034
Keywords
Cobalt-manganese oxides; Core-shell structure; Facet-evolution growth; Oxygen vacancy; Oxygen evolution reaction
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Funding
- National Key R&D Program of China [2016YFB0600901]
- National Natural Science Foundation of China [U1463205, 21525626, 21606169]
- Program of Introducing Talents of Discipline to Universities [B06006]
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Developing efficient and stable non-noble electrocatalysts for oxygen evolution reaction (OER) is one of the promising and challenging issues. This paper describes an approach to prepare core-shell cobalt manganese oxides with specific morphologies and oxygen vacancies. Via a facile seed growth method, facets evolution is achieved during the formation of core-shell structure. Benefited from optimized surface environment, oxygen vacancy-enriched octahedral cobalt-manganese oxides supported on Ni foam exhibited relatively low overpotential of 284 mV at the current density of 10 mA cm(-2) and diminutive tafel slope of 73.1 mV dec(-1) as well as long-term stability. This work successfully unveils a method for facet-modulation of core-shell metal oxides as efficient electrochemical OER catalysts. (C) 2018 Elsevier Inc. All rights reserved.
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