离子注入Pt的玻碳电极上甲酸和甲醛的电氧化

制备了离子注入Pt的玻碳电极(Pt/GC),注入剂量为5×10¹⁷ion/cm²,此电极的表面组成和各元素的浓度-深度分布用AES测量,注入Pt的价态用XPS测量.在0.5mol/LHClO₄溶液中,用Pt/GC电极和纯Pt电极研究了甲酸的电氧化行为,并在五种不同种类的电解质溶液中研究了甲醛的电氧化行为.结果表明,Pt/GC电极对甲酸和甲醛的电催化性能按真实表面积计算优于纯Pt电极.这可能与离子注入Pt过程中形成纳米团簇有关.此外,在同一电极上,甲醛在不同种类的电解质溶液中产生不同的氧化电流.说明阴离子对甲醛的电氧化过程有明显影响

Electrocatalytic Oxidation for Formic Acid and Formaldehyde on Platinum Implanted Glassy Carbon Electrode

Platinum implanted glassy carbon electrode(Pt/GC) was fabricated and implantation dose is 5×10¹⁷ion/cm². The surface elements composition and the concentration depth profiles of various elements of platinum implanted glassy carbon electrode(Pt/GC) were measured by AES. The chemical state of Pt on Pt/GCelectrode was detected by XPS. The electro-oxidation of HCOOH in 0.5 mol/L HClO₄ solution and electro oxidation of HCHOin five kinds of weak basic solutions have been investigated on Pt/GCand smooth Pt electrodes, respectively. The results show that the catalytic activity, according to the real surface area, of Pt/GCelectrode is better than that of pure Pt electrode in electro oxidation of formic acid and formaldehyde. It is possibly related to Pt nanometric clusters formed in bombing. On the same electrode, the currents of oxidation of HCHOin difference weak basic solutions are different. It shows that anion has an obvious effect on the electro oxidation of HCHO.