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文章采用强迫沉积法在Ptmesh上沉积单金属Ru和三金属Rh、Ru、Pt制得了金薄膜催化剂,分别记为Ru/Ptmesh、Pt/Rh-Ru-Pt/Ptmesh.通过循环伏安法(CV)对催化剂进行了表征,并以甲醇氧化为探针反应,研究了金属薄膜催化剂的电催化活性.结果表明,随着Ru沉积量的增加,甲醇在Run/Ptmesh表面上的氧化峰电流逐渐减小,氧化峰电势不断负移;对于三金属薄膜催化剂,甲醇氧化峰电流随Ru沉积量的增加先增大后减小,而随Rh沉积量的增加,甲醇氧化电流却逐渐减小,氧化峰电势随Rh、Ru加入量的增加也发生了很大的变化.其中,Pt2/Rh1Ru2Pt1/Ptmesh金属薄膜催化剂表现出最高的表面催化活性,甲醇的氧化峰电势负移约90mV,氧化峰电流密度为Ptmesh峰电流密度的2.8倍,说明PtRuRh三元金属催化剂具有很好的应用前景.
In this paper, gold thin film catalysts were prepared by forced deposition on Ptmesh by deposition of single metal Ru and trimetallic Rh, Ru, Pt, which were respectively denoted as Ru / Ptmesh and Pt / Rh-Ru-Pt / Ptmesh. ) Was used to characterize the catalyst and the electrocatalytic activity of the catalyst was investigated by methanol oxidation.The results showed that the oxidation peak current of methanol on Run / Ptmesh surface decreased gradually with the increase of Ru deposition For the three-metal thin film catalysts, the oxidation peak current of methanol first increases and then decreases with the increase of Ru deposition, while the oxidation current of methanol decreases gradually with the increase of deposition amount of Rh. The increase of potential with Rh and Ru also changed a lot.While Pt2 / Rh1Ru2Pt1 / Ptmesh exhibited the highest surface catalytic activity, the oxidation peak potential of methanol was negatively shifted by about 90mV, and the oxidation peak current density was Ptmesh peak current density of 2.8 times, indicating PtRuRh ternary metal catalyst has a good prospect.