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- Title
Stabilization of Palladium Nanoparticles on Nanodiamond–Graphene Core–Shell Supports for CO Oxidation.
- Authors
Zhang, Liyun; Liu, Hongyang; Huang, Xing; Sun, Xueping; Jiang, Zheng; Schlögl, Robert; Su, Dangsheng
- Abstract
Nanodiamond–graphene core–shell materials have several unique properties compared with purely sp2-bonded nanocarbons and perform remarkably well as metal-free catalysts. In this work, we report that palladium nanoparticles supported on nanodiamond-graphene core-shell materials (Pd/ND@G) exhibit superior catalytic activity in CO oxidation compared to Pd NPs supported on an sp2-bonded onion-like carbon (Pd/OLC) material. Characterization revealed that the Pd NPs in Pd/ND@G have a special morphology with reduced crystallinity and are more stable towards sintering at high temperature than the Pd NPs in Pd/OLC. The electronic structure of Pd is changed in Pd/ND@G, resulting in weak CO chemisorption on the Pd NPs. Our work indicates that strong metal–support interactions can be achieved on a non-reducible support, as exemplified for nanocarbon, by carefully tuning the surface structure of the support, thus providing a good example for designing a high-performance nanostructured catalyst.
- Subjects
NANODIAMONDS; PALLADIUM; GRAPHENE; OXIDATION of carbon monoxide; ELECTRONIC structure; CATALYTIC activity; CHEMICAL stability
- Publication
Angewandte Chemie, 2015, Vol 127, Issue 52, p16049
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201507821