Construction of stabilized bulk-nano interfaces for highly promoted inverse CeO2/Cu catalyst

Han Yan, Chun Yang, Wei-Peng Shao, Li-Hua Cai, Wei-Wei Wang, Zhao Jin and Chun-Jiang Jia ()
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Han Yan: Shandong University
Chun Yang: Shandong University
Wei-Peng Shao: Shandong University
Li-Hua Cai: Shandong University
Wei-Wei Wang: Shandong University
Zhao Jin: Shandong University
Chun-Jiang Jia: Shandong University

Nature Communications, 2019, vol. 10, issue 1, 1-10

Abstract: Abstract As the water-gas shift (WGS) reaction serves as a crucial industrial process, strategies for developing robust WGS catalysts are highly desiderated. Here we report the construction of stabilized bulk-nano interfaces to fabricate highly efficient copper-ceria catalyst for the WGS reaction. With an in-situ structural transformation, small CeO2 nanoparticles (2–3 nm) are stabilized on bulk Cu to form abundant CeO2-Cu interfaces, which maintain well-dispersed under reaction conditions. This inverse CeO2/Cu catalyst shows excellent WGS performances, of which the activity is 5 times higher than other reported Cu catalysts. Long-term stability is also very solid under harsh conditions. Mechanistic study illustrates that for the inverse CeO2/Cu catalyst, superb capability of H2O dissociation and CO oxidation facilitates WGS process via the combination of associative and redox mechanisms. This work paves a way to fabricate robust catalysts by combining the advantages of bulk and nano-sized catalysts. Catalysts with such inverse configurations show great potential in practical WGS applications.

Date: 2019
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DOI: 10.1038/s41467-019-11407-2

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