We present here the results of the oxidation of formic acid (FA) at various constant electric potentials on ordered intermetallic PtPb nanoparticles(Nps), their tolerance toward carbon monoxide (CO), and their details about oxidative mechanism. Relatively stable and higher FA oxidation current density was observed for 20 h in an aqueous solution of sulfuric acid, whereas the oxidation current of FA rapidly decreased on commercially available Pt and Pt-Ru alloy Nps. In addition, PtPb Np surfaces showed no CO-stripping oxidation current due to a negligible and/or no irreversible adsorption of CO onto the PtPb Nps. The oxidation of FA on PtPb Nps does not generate CO molecules as intermediate poisoning species, confirmed by electrochemical impedance spectroscopy.
展开▼
