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ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
Published monthly
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The universality of like-disperses-like rule for supported simple metal oxide catalysts
Xianglan Xu, Zijian Qian, Dongxue Wang, Fang Liu, Jia Zhu, Xiuzhong Fang, Junwei Xu, and Xiang Wang
Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, Institute of Rare Earths, School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, China
E-mail: xuxianglan@ncu.edu.cn
Received: 10 February 2023 Accepted: 22 July 2024
Abstract: The rutile SnO2 monolayer dispersion capacity on the rutile TiO2 (r-TiO2) was obviously higher than that on the anatase TiO2 (a-TiO2) via the qualification of the X-ray diffraction extrapolation method, presenting a like-disperses-like rule. Combined hydrogen temperature-programmed reduction and X-ray photoelectron spectroscopy results revealed that stronger interaction occurred between the supported SnO2 and the r-TiO2 than and the a-TiO2, thus resulting in higher SnO2 dispersion on the r-TiO2. The SnO2/r-TiO2 catalysts exhibited higher CO activity than the SnO2/a-TiO2 catalysts with the same SnO2 loadings, verified that the supported SnO2 and the support sharing a crystalline phase is favorable to achieve the more active dispersed component. The CeO2 monolayer dispersion capacities on cubic c-ZrO2 and monoclinic m-ZrO2 supports further confirmed the universality of the like-disperses-like rule for oxide–oxide systems independent on preparation methods. By comparing a series of oxide–oxide systems, the like-disperses-like rule involved not only the crystalline phase and lattice matching, but also M–O bond characteristics of two oxides. Graphical Abstract
Keywords: Environmental Chemistry; Monolayer dispersion capacity; Crystalline phase; Lattice matching; M–O bond; CO oxidation
Full paper is available at www.springerlink.com.
DOI: 10.1007/s11696-024-03616-x
Chemical Papers 78 (13) 7573–7581 (2024)
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