| Autor: |
Zehai Xu, Yufan Zhang, Xiong Li, Lei Qin, Qin Meng, Guoliang Zhang, Zheng Fan, Zhen Xue, Xinwen Guo, Qinglin Liu, Qingbiao Li, Baohua Mao, Zhi Liu |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
|
| Zdroj: |
iScience, Vol 21, Iss , Pp 19-30 (2019) |
| Druh dokumentu: |
article |
| ISSN: |
2589-0042 |
| DOI: |
10.1016/j.isci.2019.10.013 |
| Popis: |
Summary: 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 m2/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. : Chemistry; Catalysis; Environmental Nanotechnology Subject Areas: Chemistry, Catalysis, Environmental Nanotechnology |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
