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通过低温络合反应制备了高分散高合金化的Pt-Ru固溶体,并将其均匀地担载在有序介孔碳CMK-3上,以形成二元复合金属催化剂.XRD谱图表明,fcc结构的Pt原子部分被hcp结构的Ru原子取代形成置换固溶体,而且几乎没有未形成合金的Ru存在.TEM和XRD研究结果表明,Pt-Ru/CMK-3催化剂中Pt-Ru合金粒子的平均粒径为2·7nm,且具有良好的均一度.还研究了催化剂对甲醇的电催化氧化性能,并与E-TEK公司同类催化剂进行了对比,研究结果表明,Pt-Ru/CMK-3催化剂具有较大的电化学活性面积,对甲醇的电催化氧化性能和抗CO中毒能力明显优于其它同类催化剂.
Highly dispersed and highly alloyed Pt-Ru solid solution was prepared by low temperature complexation reaction and uniformly supported on the ordered mesoporous carbon CMK-3 to form a binary composite metal catalyst. XRD spectra showed that fcc The Pt atoms of the structure were replaced by hcp-structured Ru atoms to form a substitutional solid solution, and there was almost no Ru without the formation of alloys.The results of TEM and XRD indicated that the mean particle size of the Pt-Ru alloy particles in the Pt-Ru / CMK-3 catalyst Diameter of 2. 7nm, and has a good uniformity.Also the electrocatalytic oxidation of methanol on the catalyst performance was also studied, and compared with the similar E-TEK catalyst, the results show that the Pt-Ru / CMK-3 catalyst has Larger electrochemical active area, the electrocatalytic oxidation of methanol and anti-CO poisoning ability was significantly better than other similar catalysts.