title: Platinum nanoparticles stabilized by cucurbit[6]uril with enhanced catalytic activity and excellent poisoning tolerance for methanol electrooxidation.
abstract: Three sub-10 nm platinum nanoparticles (PtNPs) with distinctive morphologies were developed by using cucurbit[6]uril (CB[6]) as stabilizing agent and support. Both the size and shape of the PtNPs were simultaneously controlled by tuning the reducing agents. The prepared NPs have been comprehensively characterized by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, and cyclic voltammetry. On account of the presence of CB[6] and its unique structural features, the as-prepared PtNPs are homogeneous in morphologies and exhibit higher activities toward methanol electrooxidation than commercial Pt/C. CB[6] has the ability to bind small molecules that can promote CO oxidation, therefore, all the three PtNPs showed enhanced poisoning tolerance. Such unique abilities of CB[6] can even promote the poisoning tolerance of commercial Pt/C through simple physical mixing.
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Science, 155 Yangqiao West Road, Fuzhou Fujian, PR China.
authors.forename: Minna
authors.initials: M
authors.lastname: Cao
authors.forename: Dongshuang
authors.initials: D
authors.lastname: Wu
authors.forename: Shuiying
authors.initials: S
authors.lastname: Gao
authors.forename: Rong
authors.initials: R
authors.lastname: Cao