甲酸在Pt(100)/Sb电极上氧化的时间分辨原位FTIR反射光谱研究

In Situ Time-resolved FTIR Studies of HCOOH Oxidation on Pt(100)/Sb Electrodes

以电化学原位时间分辨FTIR反射光谱和循环伏安方法研究甲酸在不同Sb覆盖度修饰的Pt(10 0 )单晶电极上的氧化。发现Sbad的修饰抑制了甲酸的解离吸附 ,使反应经活性中间体直接氧化至CO2 。电化学和红外光谱数据表明 ,θSb =0 2 4的Pt(10 0 )

The electrocatalytic oxidation of formic acid on Pt(100)/Sb electrodes of different coverage of Sb was investigated by using electrochemical techniques and in situ time resolve FTIRS.The results demonstrated that the diessociative adsorption of formic acid was inhibited by the presence of Sb ad on Pt(100) surface,as a consequence HCOOH can be oxidized directly into CO 2 via reactive intermediates.The rate of oxidation of formic acid varied with the coverage of Sb ad .It was revealed that at a Sb ad coverage of 0 24 the Pt(100)/Sb electrode exhibited the highest electrocatalytic activity for HCOOH oxidation.