Synthesis of platinum nanoparticles with higher stability in ionic liquid–Nafion film and their electrocatalytic application

Abstract

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 Nafionmodified 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.

Covalently Modified Electrode with Pt Nanoparticles Encapsulated in Porous Organic Polymer for Efficient Electrocatalysis

“…The electrocatalytic activity of the modified porous electrode rGCE-Pt/pIM-2BrB was investigated by HER in an acidic electrolyte (0.5 mol L –1 H 2 SO 4 ) (Figure S11). Only tiny changes were observed for LSV curves of rGCE-pIM-2BrB at different scan rates in 0.5 mol L –1 H 2 SO 4 when the scan rate increases from 2 to 100 mV s –1 (Figure S12), indicating efficient charge and mass transport in the electrocatalytic process. As exhibited in Figure , rGCE-Pt/pIM-2BrB shows an overpotential of only −56 mV at 10 mA cm –2 of HER at 50 mV s –1 . The electrochemical stability of rGCE-Pt/pIM-2BrB was evaluated by durability measurements by CV from 0.0 to −1.0 V. A slight negative shift was observed for the HER polarization curves of rGCE-Pt/pIM-2BrB after a 4000 cycling test, revealing its long-term durability (Figure b).…”