离子注入Pt的玻碳电极上甲酸和甲醛的电氧化

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

制备了离子注入 Pt的玻碳电极 ( Pt/GC) ,注入剂量为 5× 1 0 17ion/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/L HCl O4 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 .

Platinum implanted glassy carbon electrode(Pt/GC) was fabricated and implantation dose is 5×10 17 ion/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/GC electrode was detected by XPS. The electro oxidation of HCOOH in 0.5 mol/L HClO 4 solution and electro oxidation of HCHO in five kinds of weak basic solutions have been investigated on Pt/GC and smooth Pt electrodes, respectively. The results show that the catalytic activity, according to the real surface area, of Pt/GC electrode 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 HCHO in difference weak basic solutions are different. It shows that anion has an obvious effect on the electro oxidation of HCHO.