碱性溶液中乙醇在Pt和Pd电极上氧化活化能比较

Apparent activation energies for ethanol oxidation on Pt and Pd electrodes in alkaline medium

用循环伏安法比较了碱性条件下乙醇在Pt和Pd电极上氧化活性的差异,得到乙醇在Pd电极上氧化活性比在Pt电极上好的结果.使用不同温度下线性扫描曲线来计算乙醇电化学氧化活化能,乙醇在Pt和Pd电极上起峰电位和峰电位之间氧化活化能随着电位增大而增大,但在相应电位下在Pd上的值小于在Pt上的值,说明乙醇在Pd上比在Pt上更容易电化学氧化.

Here,the activity and apparent activation energies(Ea) of ethanol electrooxidation on Pt and Pd electrodes have been studied in alkaline medium.The current densities of ethanol oxidation on Pd electrode at corresponding potentials are higher than that on Pt electrode.The apparent activation energies of ethanol oxidation on Pd electrode are lower than that on Pt at the potential from onset potential to peak potential.Ethanol oxidation on Pd has lower apparent activation energies and shows better electrooxida...