The Lanzhou Chemical Research Institute made a series of researches on the carbon monoxide at room temperature for catalytic oxidation

Catalytic oxidation of carbon monoxide at room temperature is used in a wide range of applications, such as fuel cells, cigarette reduction, underground mine rescue cabins, fire self-rescue breathing apparatus, gas purification in CO2 lasers, and motor vehicle exhaust in semi-enclosed spaces (including road tunnels, underground parking lots, etc.) Removal of trace carbon monoxide, etc. However, the catalytic removal of carbon monoxide at room temperature under the condition of low noble metal content is one of the challenges in the field of catalytic research in the world today.

The National Research Center for Fine Petrochemical Intermediates of the Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Tang Zhicheng's task force has designed a series of catalysts and successfully applied them to eliminate carbon monoxide at room temperature.

They first prepared mesoporous and microporous ceria, and transition metal-doped mesoporous ceria-based composite metal oxides by the hard template method (nanocasting technology), and realized the mesopores by controlling the synthesis conditions of the template. Directional design of metal oxide channels. The results show that the prepared catalyst performance is not only related to the specific surface area of ​​the catalyst, grain size and pore structure, but also related to the active oxygen species on the surface of the catalyst. Related work has been published in CrystEngComm (2014, 16: 5189-5197), Journal of Hazardous Materials (2013, 263: 299-306).

They also used the three-dimensional mesoporous KIT-6 molecular sieve as a template and used nano-casting technology to prepare a series of mesoporous carbon materials (meso-C), and used them as carriers to prepare a series of precious metal catalysts by sedimentation method. Studies have shown that the calcination temperature of the catalyst is closely related to the precious metal dispersity and the presence of oxides on the surface of the catalyst. Under the condition of lower noble metal content, carbon monoxide can be completely eliminated at room temperature and can be operated without deactivation for a long period of time. Related work has been published in RSC Advances (2014, 4: 23262-270) and (2015, 5: 59666-59676), Physical Chemistry Chemical Physics (2015, 17: 29027-29035).

The above work has received substantial funding from the National Natural Science Foundation of China and the National Science Research Program of the Ministry of Science and Technology.

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