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Recently, the Institute of Metal Research of the Chinese Academy of Sciences, the Department of Catalytic Materials, the Ningbo Institute of Materials Technology and Engineering of the Chinese Academy of Sciences, and the Chinese Academy of Engineering Physics have cooperated to synthesize a cobalt oxide catalyst
rich in high index crystal planes.
It has the potential to
replace the precious metals palladium and platinum in the methane catalytic combustion reaction.
In this study, the carbon-coated cobalt nanoparticles were partially broken by in situ oxidation method, and the metal cobalt underwent violent oxidation after exposure and caused the core volume to expand, and the residual graphite shell assisted in the formation of cobalt oxide particles
with a high degree of defects.
The catalytic reaction kinetics show that the catalyst has the characteristics of high conversion frequency and low apparent activation energy, and the reaction rate has no obvious dependence on the partial pressure of oxygen, and it shows high activity
in the complete oxidation reaction of carbon monoxide, propane and benzene series.
At present, researchers are using graphite shell induction effects to synthesize other variable valence transition metal oxides, and explore their potential applications
in catalysis, energy storage, fuel cells and other fields.
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