Journal
NEW JOURNAL OF CHEMISTRY
Volume 45, Issue 7, Pages 3546-3551Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nj06110g
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Funding
- Natural Science Foundation of Shandong Province, China [ZR2019YQ08]
- National Natural Science Foundation of China [22072069, 21703113]
- Foundation of Key Laboratory of Low-Carbon Conversion Science & Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences [KLLCCSE-201904]
- Chongqing Key Laboratory of Photo-Electric Functional Material
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The development of a defective Co3O4 material through acid etching procedure shows enhanced performance as a non-noble metal catalyst for methane combustion, with a higher methane conversion rate compared to pristine Co3O4. This study provides positive guidance for the design of non-noble metal catalysts in methane combustion applications.
Development of an effective Co3O4 material as an advanced non-noble metal catalyst for methane combustion has great economic and environmental significance. Herein, a facile acid etching procedure is adapted to engineer a defective Co3O4 possessing both highly exposed surface defects and lattice defects such as abundant oxygen vacancies. The defective structures facilitate an elevated exposure of active surface oxygen and enhanced redox properties. Meanwhile, the acid treatment endows a more acidic surface, which will promote the desorption of the CO2 product. Consequently, an improved activity for methane combustion with a half methane conversion temperature (T-50) of 311 degrees C (33 000 mL g(-1) h(-1)) is obtained for the defective Co3O4, corresponding to the methane conversion rate of 4.1 mu mol g(-1) s(-1), 5.2 times that of the pristine Co3O4. The universality of this strategy is further verified towards a MnO2 catalyst. This study will provide positive guidance for non-noble metal catalyst design in the application of methane combustion.
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