新型阳极材料Pt-Ru/CMK-3的制备与性能研究  

Preparation and Properties of New Anode Material Pt-Ru/CMK-3

作　　者：曹洁明[1] 吴伟[1] 陈煜[2] 刘劲松[1] 曹喻霖[1] 何建平[1] 唐亚文[2] 杨春[2] 陆天虹[2] 

机构地区：[1]南京航空航天大学材料科学与技术学院,南京210016 [2]南京师范大学化学系,南京210097

出　　处：《化学学报》2007年第12期1117-1122,共6页Acta Chimica Sinica

摘　　要：通过在多元金属体系中加入络合剂四氢呋喃(THF),改变其热力学参数进而改变其动力学还原速率,在低温下同时还原金属Pt和Ru,制备了高分散、高合金化的Pt-Ru固溶体并均匀担载在有序介孔碳CMK-3上,以形成二元复合金属催化剂.XRD图谱表明,f.c.c结构中Pt原子部分被h.c.p结构中Ru原子取代形成置换固溶体,且几乎没有未合金的Ru存在.TEM,XRD和N2吸附-脱附研究显示,Pt-Ru/CMK-3催化剂中Pt-Ru合金粒子的平均粒径为3.2nm,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.结果显示,Pt-Ru/CMK-3催化剂拥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他同类催化剂.High-alloying Pt-Ru solid solution was firstly prepared by complexing reaction and uniformly dispersed on rigid ordered mesoporous carbon CMK-3 to form the two-element compound catalysts. XRD patterns show that Pt atoms with f.c.c structure are almost replaced by Ru atoms with h.c.p structure. XRD, TEM and nitrogen adsorption isotherm measurements indicate that the average diameter was 3.2 nm with uniform size. The electrocatalytic activity of Pt-Ru/CMK-3 for the ethanol oxidation was studied and compared with that of Pt-Ru/XC-72 of E-TEK congeneric catalyst. The results showed that the catalyst of Pt-Ru/CMK-3 possessed bigger electrocatalytic activity area, and the electrocatalytic activity for the oxidation of methanol and the ability of resisting CO poison exceeded the same kind of catalysts because of the appropriate extent of alloying and average particle diameter.

关 键 词：直接甲醇燃料电池(DMFC) Pt-Ru/CMK-3 络合反应 介孔材料 甲醇电催化氧化 

分 类 号：O611.3[理学—无机化学]