Electrooxidation of Acetaldehyde Using PtSnO2/C and PtSnO2/CNT Catalysts Prepared by Modified Alcohol-Reduction Process

Well-dispersed binary PtSnO2 catalysts with atomic ratio of 75:25 were deposited onto Vulcane XC-72R and CNT using modified alcohol-reduction process for electrochemical oxidation of acetaldehyde. We use CNTs as catalyst support for PtSnO2 catalyst .In this work, we synthesized SnO2 by an ex situ method and made a binary catalyst by adding a tin oxide to Pt supported on CNT and its performance compared with Pt-SnO2/C. The XRD analysis showed the alloy catalyst was synthesized. An electrochemical study in acetaldehyde and acid medium showed that the PtSnO2/CNT catalyst had a better performance compared with the PtSnO2/C catalyst. The CV analysis indicate that the presence of CNT as support increase the activity of catalyst to oxidation of acetaldehyde and have a low onset potential (about 200 mV) for the electrooxidation of adsorbed acetaldehyde than PtSnO2/C. However, for the overall oxidation of acetaldehyde, the PtSnO2/CNT catalyst is favorable for the activation of C-C bond breaking, thereby generating higher current density (mass activity) at higher potentials.