Journal
CHEMCATCHEM
Volume 10, Issue 18, Pages 4134-4142Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201800925
Keywords
confinement; core-shell structured materials; CO and toluene catalytic oxidation; interface catalysis; ultrafine Pt-Ni(O) NPs
Categories
Funding
- National Key Research and Development Programs of China [2016YFC0205900]
- National Natural Science Foundation of China [21503106, 21566022, 21533002, 21773106]
- Natural Science Foundation of Jiangxi Province [20171BCB23016, 20171BAB203024]
- Foundation of State Key Laboratory of Coal Clean Utilization and Ecological Chemical Engineering [2016-15]
Ask authors/readers for more resources
Noble metal/transition metal oxide interfaces are typically considered as highly active sites for most heterogeneous catalytic reactions and can effectively increase the utilization of noble metals. One of the challenges in such catalytic systems, particularly under high-temperature reactions, is the lack of an effective strategy to stabilize the catalysts against sintering over time and maintain the metal/oxide interfaces. We developed a one-pot facile strategy to embed the ultrafine Pt-Ni(O) nanoparticles (NPs) with dual interfaces (Pt-Ni-NiO) in a microporous silica shell to fabricate a high-performance heterogeneous oxidation catalyst (assigned as Pt-Ni(O)@SiO2) for the first time. Owing to the ultra-small size of the Pt-Ni(O) NPs and the confinement effect of the silica shell, the resulting Pt-Ni(O)@SiO2 catalyst exhibited enhanced performance for CO oxidation and toluene [one of the main volatile organic compounds, (VOCs)] total combustion. The effects of Pt-NiO, Pt-Ni-NiO, and Pt-Ni interfaces were also studied in detail. The results indicated that the Pt-NiO and Pt-Ni alloy dual interface have the improving effect for catalytic oxidation and reducing utilization of noble metals. The strategy developed in this work may represent a general approach in the rational design of other high-performance catalysts combining the interface catalysis and physical confinement concept to improve the usage of the noble metals.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available