Effect of Preparation Conditions on the Catalytic Performances of PtRu/CAs Catalysts for Methanol Electro-oxidation

The impregnation method was applied to prepare the platinum-ruthenium (Pt-Ru) catalysts in which mass fraction of Pt is 15%, and the atomic ratio of Pt and Ru is 2:1. The properties of the catalysts prepared with varied impregnated mediums (acetic acid, sodium acetate and water) were studied in detail. The X-ray diffractometry(XRD) and transmission electron microscopy(TEM) were used to observe the surface morphology of above Pt-Ru catalysts. The energy dispersive X-ray spectrum (EDS) was used to analyze the composition of the catalysts. The electrochemical performance of the catalysts was examined by cyclic voltammetry with a glassy carbon working electrode in a solution of 1. 0 mol/L CH3OH and 0. 5 mol/L H2SO4. In all the above catalysts, the catalyst prepared with the metal precursor impregnated in CH3COOH and carbon aerogels as a carrier has the highest electrocatalytic activity. The peak current density gets to 38. 24 mA/cm(2), which is much higher than the rest of the catalysts prepared under other conditions in this paper.