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A three-dimensional flower-like Mn--Ni--Co--O microstructure as a high-performance electrocatalyst for the methanol oxidation reaction.
- Source :
-
New Journal of Chemistry . 4/28/2022, Vol. 46 Issue 16, p7657-7662. 6p. - Publication Year :
- 2022
-
Abstract
- In this work, a three-dimensional flower-like structured Mn--Ni--Co--O ternary metal oxide is in situ grown on Ni foam through a hydrothermal synthesis and a subsequent calcination method. The asprepared Mn--Ni--Co--O sample has a novel three-dimensional microstructure, which is made up of nanorods and hexagonal nanosheets, and the nanorods are orderly arranged on the nanosheets. The flower-like structured Mn--Ni--Co--O can be used as an electrocatalyst for the electrooxidation of methanol, and it exhibits a current density of 113 mA mg-1 at 0.60 V (vs. Ag/AgCl) in 1 M KOH and 0.5 M methanol, which is much higher than that of the precursor, and the Mn--Co--O and Ni--Co--O samples. In addition, the Mn--Ni--Co--O electrocatalyst can still maintain 92.3% current density retention ratio after 3000 CV cycles, showing good long-term stability. The unique three-dimensional flower-like structure and the rich oxidation states of the metal ions in the Mn--Ni--Co--O catalyst are helpful to achieve good catalytic activity, superior stability and wonderful long-term stability. This ternary metal oxide can be a prospective electrocatalyst for direct methanol fuel cells. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 46
- Issue :
- 16
- Database :
- Academic Search Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 162502158
- Full Text :
- https://doi.org/10.1039/d2nj00527a