报告题目: Formic acid electrooxidation on Pt@Au surface through spontaneous
deposition: activity, mechanism and halide effect
报告人: Dr. Xiao Li
University of South Florida, USA
时间: 3月25日(周一) 下午4:00
地点: 化四－112报告厅
以下为报告的摘要部分：
Formic acid electrooxidation on Pt@Au surface through spontaneous
deposition: activity, mechanism and halide effect
Ranjani Muralidharan, Michael McIntosh, Xiao Li.
Department of Chemistry, University of South Florida, USA
报告时间：3月25日（周一） 4:00pm
报告地点：化四－112报告厅
Abstract:
Platinum modified gold catalysts have a great potential as catalyst for formic acid electrooxidation which occurs in the anode of formic acid fuel cells. The goal of this research is to examine the catalytic activity of the atomic adlayers of platinum spontaneously deposited on gold, explore the reaction mechanism of the electrooxidation process and investigate the effect of haloplatinate solution during the deposition process. Electrochemical results prove the strong activity of Pt@Au surface with higher oxidation current and lower starting potentials. In situ SERS with potential control has revealed that formate appearing at lower wavenumbers of 300 cm-1 is the possible intermediate in the catalytic processes on all three Pt@Au surfaces, however with different potential-dependent behaviors. Dramatic effect of the haloplatinate has been observed on the catalytic activities of Pt@Au surfaces. Generally, Pt@Au surface prepared from chloroplatinate is most active in oxidizing formic acid followed by that from bromoplatinate and iodoplatinate solution. Clearly, the use of different haloplatinate solution affects not only the amount of Pt deposited on the Au surface, but also the surface structure of those deposits.
欢迎感兴趣的老师与学生参加，谢谢 ！
固体表面物理化学国家重点实验室
biwn必赢
2013-03-20
