Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 22, Issue 44, Pages 23602-23607Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm35239g
Keywords
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Funding
- National Natural Science Foundation of China [21171037]
- Natural Science Foundation of Fujian Province [2011J0101]
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The {PEI-GNs/PMo12}(n) composite films are prepared by an LBL electrostatic assembly technique, and their uniform and homogeneous traits have been verified by UV-vis and cyclic voltammetry. The {PEI-GNs/PMo12}(n) composite films are used as a novel catalyst support for electro-deposition of Pt particles in situ. Pt particles immobilizing on the surface of {PEI-GNs/PMo12}(n) composite films were confirmed by XPS, EDX, XRD and FE-SEM. The interesting seashell-like Pt micro-nano-clusters can be obtained when {2PEI-GNs/PMo12} composite films are used as catalyst supports. Pt-{PEI-GNs/PMo12}(n) composite films present good electrocatalytic activity regarding methanol oxidation and improved tolerance of CO. These results indicate that poly(ethyleneimine) functionalized graphene (PEI-GNs) preserves the superior electric conductivities of graphene sheets in the composite films, and the introduction of electroactive [PMo12O40](3-) (PMo12) into the composite films helps to convert intermediate species CO into CO2 from the Pt nanoparticles. The synergistic effect of PEI-GNs and PMo12 remarkably enhanced the electrocatalytic activity and stability regarding methanol oxidation.
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