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Platinum Nanoparticles Stabilized by Cucurbit[6]uril with Enhanced Catalytic Activity and Excellent Poisoning Tolerance for Methanol Electrooxidation
Author(s) -
Cao Minna,
Wu Dongshuang,
Gao Shuiying,
Cao Rong
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201201817
Subject(s) - platinum nanoparticles , x ray photoelectron spectroscopy , methanol , cyclic voltammetry , catalysis , transmission electron microscopy , platinum , nanoparticle , homogeneous , chemistry , co poisoning , reducing agent , materials science , nuclear chemistry , chemical engineering , nanotechnology , electrochemistry , organic chemistry , electrode , physics , engineering , thermodynamics
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.