Journal
ISCIENCE
Volume 21, Issue -, Pages 19-+Publisher
CELL PRESS
DOI: 10.1016/j.isci.2019.10.013
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Funding
- National Natural Science Foundation of China [21236008, 21736009, 21808202]
- Zhejiang Provincial Natural Science Foundation of China [LY18B060010]
- Minjiang Scholarship from Fujian Provincial Government
- Postdoctoral Science Foundation of China [2018M642480]
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Development of spinel oxides as low-cost and high-efficiency catalysts is highly desirable; however, rational synthesis of efficient and stable spinel systems with precisely controlled structure and components remains challenging. We demonstrate the design of complex nanostructured cobalt-based bimetallic spinel catalysts for low-temperature CO oxidation by a simple template-free method. The self-assembled multi-shelled mesoporous spinel nanostructures provide high surface area (203.5 m(2)/g) and favorable unique surface chemistry for producing abundant active sites and lead to the creation of robust microsphere configured by 16-nm spinel nanosheets, which achieve satisfactory water-resisting property and catalytic activity, Theoretical models show that O vacancies at exposed {110} facets in cubic spinel phase guarantee the strong adsorption of reactive oxygen species on the surface of catalysts and play a key role in the prevention of deactivation under moisture-rich conditions. The design concept with architecture and composition control can be extended to other mixed transition metal oxide compositions.
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