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4-(3-methyl-1-imidazolio)-1-butanesulphonic acid triflate (BSMIMOTF)–Nafion film is introduced as a novel catalyst support. Nafion is used as the conductive membrane for BSMIMOTF immobilisation. A uniform distribution of spherical platinum nanoparticles (PtNPs) 10–30 nm in diameter can be electrochemically deposited on the membranous BSMIMOTF–Nafion matrix. Compared with the PtNPs on a bare and Nafion-modified electrode, the proposed sulphonyl-terminated ionic liquid (IL)–Nafion stabilised PtNPs exhibit higher electrocatalytic activity and better stability towards the electro-oxidation of methanol. The IL–Nafion film as a new catalyst support has great potential application in direct-methanol fuel cells.
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