期刊
INORGANIC CHEMISTRY
卷 59, 期 2, 页码 1218-1226出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.9b02937
关键词
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资金
- National Natural Science Foundation of China (NSFC) [21771140, 51271132, 91222103]
- Shanghai Engineering Research Center of Building Waterproof Materials [18DZ2253200]
- U.K. Engineering and Physical Sciences Research [EP/P018998]
- Newton Mobility Grant through Royal Society of London [IE161019]
- Newton Mobility Grant through NSFC [IE161019]
A nanostructural catalyst with long-term durability under harsh conditions is very important for an outstanding catalytic performance. Herein, a new ultrastable PtCo/Co3O4-SiO2 nano-catalyst was explored to improve the catalytic performance of carbon monoxide (CO) oxidation by virtue of the surface active lattice oxygen derived from strong metal-support interactions. Such a structure can overcome the issues of CO3O4-SiO2 inactivation by water vapor and the Pt inferior activity at low temperature. Further, Co3O4-SiO2 nanosheets endow superior structure stability under high temperatures of up to 800 degrees C, which gives long-term catalytic cyclability of PtCo/Co(3)O4-SiO2 nanocomposites for CO oxidation. Moreover, the large specific surface areas (294 m(2) g(-1)) of the nanosheet structure can expose abundant surface active lattice oxygen, which significantly enhanced the catalytic activity of CO oxidation at 50 degrees C over 30 days without apparent aggregation of PtCo nanoparticles after 20 cycles from 50 to 400 degrees C. It can be expected to be a promising candidate as an ultrastable efficient catalyst.
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