Preparation and Characterization of PtSnO_2/C Catalyst With Enhanced Catalytic Activity for Ethanol Electro-oxidation

AN Lijuan;ZHU Mingyuan;YU Feng;DAI Bin;Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan/School of Chemistry and Chemical Engineering, Shihezi University;

PtSnO2/C catalyst;;Ethanol;;Electrochemical oxidation;;Catalytic activity

Direct alcohol fuel ce ll(DEFC) is well known that Pt- based materials is one of the most active materials are commonly used anode catalysts in DEFC.It is necessary to find new catalysts that can enhance its catalytic activity for ethanol electro- oxidation.In this paper,we report a composition of synthesis, characterization and electrochemical evaluation of Pt Sn O2/C catalyst.The chemical catalysts was studied using inductively coupled plasma- atomic emission spectroscopy(ICP- AES),with the result of Pt/Sn ratio is 3∶1.On the basis of x- ray diffraction(XRD) and x- ray Photonelectron(XPS) analysis,we can conclude that the as- prapared catalyst contained Pt and Sn O2 nanocrystalline as expected. Transmission electron microscopy(TEM),cyclic voltammetry(CV),linear sweep voltammetry(LSV) measurements were carried out to characterize the morphology and properties of the catalyst,and the electrochemical activity surface area(ECSA) was also calculated.It is deduced that the unchanged lattice parameter of Pt in the Pt Sn O2/C catalyst is favorable to ethanol adsorption, and meanwhile,tin oxide in the vicinity of Pt nanoparticles could offer oxygen species conveniently to remove the CO- like species of ethanolic residues to free Pt active sites that increase the catalytic activity and CO tolerance for ethanol electro- oxidation.