Abstract
The electrocatalytic oxidation of propane-1,3-diol on Ag/C modified with a tiny amount of Pt is investigated. By electrochemically depositing Pt on Ag nanoparticles supported on carbon black, the Pt-modified Ag/C catalysts with Pt/(Pt + Ag) atomic percent of 0.14% and 0.28% were prepared. Instrumental and electrochemical characterizations of the Pt-modified Ag/C catalysts show that only a small part of the Ag nanoparticle surface is covered by Pt adatoms. The performance of Pt-modified Ag/C catalysts in the electrooxidation of propane-1,3-diol in alkaline solution reveals that the catalysts have property reflecting the properties of both Pt and Ag but exhibit significantly higher activity than Pt/C, although Ag/C shows no catalytic activity and the Pt loading of Pt-modified Ag/C is less than 0.4% of that of Pt/C. The Pt-modified Ag/C catalysts also show superior to the Pt-modified planar Ag electrodes in propane-1,3-diol oxidation, indicating that the Pt deposit on Ag nanoparticles has higher activity than that on bulk Ag. The modification of Ag/C with a tiny amount of Pt is shown to be an effective method for preparing catalysts with high activity for the oxidation of propane-1.3-diol at low cost.
Published Version
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