In situ oxidation of carbon-encapsulated cobalt nanocapsules creates highly active cobalt oxide catalysts for hydrocarbon combustion

Han Wang, Chunlin Chen, Yexin Zhang, Lixia Peng, Song Ma (), Teng Yang, Huaihong Guo, Zhidong Zhang, Dang Sheng Su and Jian Zhang ()
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Han Wang: Shenyang National Laboratory for Material Science, Institute of Metal Research, Chinese Academy of Sciences
Chunlin Chen: Institute of New Energy Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences
Yexin Zhang: Institute of New Energy Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences
Lixia Peng: Science and Technology on Surface Physics and Chemistry Laboratory
Song Ma: Shenyang National Laboratory for Material Science, Institute of Metal Research, Chinese Academy of Sciences
Teng Yang: Shenyang National Laboratory for Material Science, Institute of Metal Research, Chinese Academy of Sciences
Huaihong Guo: Shenyang National Laboratory for Material Science, Institute of Metal Research, Chinese Academy of Sciences
Zhidong Zhang: Shenyang National Laboratory for Material Science, Institute of Metal Research, Chinese Academy of Sciences
Dang Sheng Su: Shenyang National Laboratory for Material Science, Institute of Metal Research, Chinese Academy of Sciences
Jian Zhang: Institute of New Energy Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences

Nature Communications, 2015, vol. 6, issue 1, 1-6

Abstract: Abstract Combustion catalysts have been extensively explored to reduce the emission of hydrocarbons that are capable of triggering photochemical smog and greenhouse effect. Palladium as the most active material is widely applied in exhaust catalytic converter and combustion units, but its high capital cost stimulates the tremendous research on non-noble metal candidates. Here we fabricate highly defective cobalt oxide nanocrystals via a controllable oxidation of carbon-encapsulated cobalt nanoparticles. Strain gradients induced in the nanoconfined carbon shell result in the formation of a large number of active sites featuring a considerable catalytic activity for the combustion of a variety of hydrocarbons (methane, propane and substituted benzenes). For methane combustion, the catalyst displays a unique activity being comparable or even superior to the palladium ones.

Date: 2015
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DOI: 10.1038/ncomms8181

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