5 years ago

Incorporating Rich Mesoporosity into a Ceria-Based Catalyst via Mechanochemistry

Incorporating Rich Mesoporosity into a Ceria-Based Catalyst via Mechanochemistry
Matthew F. Chisholm, Shize Yang, Guanzhong Lu, Wangcheng Zhan, Sheng Dai, Pengfei Zhang, Yanglong Guo
Ceria-based materials possessing mesoporous structures afford higher activity than the corresponding bulk materials in CO oxidation and other catalytic applications, because of the wide pore channel and high surface area. The development of a direct, template-free, and scalable technology for directing porosity inside ceria-based materials is highly welcome. Herein, a family of mesoporous transition-metal-doped ceria catalysts with specific surface areas up to 122 m2 g–1 is constructed by mechanochemical grinding. No templates, additives, or solvents are needed in this process, while the mechanochemistry-mediated restructuring and the decomposing of the organic group led to plentiful mesopores. Interestingly, the copper species are evenly dispersed in the ceria matrix at the atomic scale, as observed in high resolution scanning transmission electron microscopy in high angle annular dark field. The copper-doped ceria materials show good activity in the CO oxidation.

Publisher URL: http://dx.doi.org/10.1021/acs.chemmater.7b02206

DOI: 10.1021/acs.chemmater.7b02206

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