Abstract
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.
Original language | English |
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Pages (from-to) | 105-110 |
Number of pages | 6 |
Journal | Journal of Catalysis |
Volume | 369 |
DOIs | |
Publication status | Published - Jan 2019 |
Externally published | Yes |
Keywords
- Cobalt-manganese oxides
- Core-shell structure
- Facet-evolution growth
- Oxygen evolution reaction
- Oxygen vacancy