Abstract
We synthesized highly dispersive Pt nanoparticles on graphene nanoplates (GNPs) under the orientation of different biothiols templates. Through the characterizations of FT-IR, ITC, HRTEM, EELS, XPS, cyclic voltammetry and chronoamperometry, it is demonstrated that the catalytic performance of GNPs-supported Pt NPs is greatly associated with thiol-containing groups, particle sizes as well as morphologies. There is a synergetic effect between biothiols and GNPs to modulate the dispersity and the distribution of Pt NPs. The biothiol-templated non-spherical Pt NPs on GNPs show higher activity and better stability in methanol oxidation reaction, comparing with those spherical Pt NPs formed in the solution and commercial Pt/C. Particularly for adopting cysteine as the biotemplate, Pt NPs show the highest catalytic activities as well as the enhanced antipoisoning property, with the mean width of 3 nm and the length ranging in 3–13 nm. These results pave a new way to manufacture hybrid nanocatalysts on the basis of facile modulation by biothiols.
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