title: Stabilization of Palladium Nanoparticles on Nanodiamond-Graphene Core-Shell Supports for CO Oxidation.
abstract: Nanodiamond-graphene core-shell materials have several unique properties compared with purely sp(2) -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 sp(2) -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.
authors.affiliation: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016 (China).
authors.forename: Liyun
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016 (China).
authors.forename: Hongyang
authors.initials: H
authors.lastname: Liu
authors.affiliation: Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, Berlin 14195 (Germany).
authors.forename: Xing
authors.initials: X
authors.lastname: Huang
authors.affiliation: Shanghai Institute of Applied Physics, Shanghai Synchrotron Radiation Facility, Chinese Academy of Sciences, 239 Zhangheng Road, Shanghai 201204 (China).
authors.forename: Xueping
authors.initials: X
authors.lastname: Sun
authors.affiliation: Shanghai Institute of Applied Physics, Shanghai Synchrotron Radiation Facility, Chinese Academy of Sciences, 239 Zhangheng Road, Shanghai 201204 (China).
authors.forename: Zheng
authors.initials: Z
authors.lastname: Jiang
authors.affiliation: Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, Berlin 14195 (Germany).
authors.forename: Robert
authors.initials: R
authors.lastname: Schlögl
authors.affiliation: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016 (China). dssu@imr.ac.cn.
authors.forename: Dangsheng
authors.initials: D
authors.lastname: Su
keywords: CO oxidation; graphene; metal-support interactions; nanodiamonds; palladium nanoparticles