碳载Pt-P催化剂对氧还原的电催化性能  

Electrocatalytic Performance of the Carbon-Supported Pt-P Catalyst for Oxygen Reduction

作　　者：王彦恩[1] 曹爽[2] 唐亚文[3] 王春[1] 马晶军[1] 陆天虹[3] 

机构地区：[1]河北农业大学理学院保定,南京210097 [2]中国地质大学长城学院地球科学与资源系保定,南京210097 [3]南京师范大学化学与环境科学学院,南京210097

出　　处：《应用化学》2011年第1期44-47,共4页Chinese Journal of Applied Chemistry

基　　金：科技部“八六三”计划(2007AA05Z143,2007AA05Z159);国家自然科学基金(20873065,21073094)资助项目

摘　　要：用NaH2PO2液相还原方法制得碳载Pt-P(Pt-P/C)催化剂(m(Pt):m(P)=5:1)。X射线衍射谱测量表明,Pt-P/C催化剂的Pt衍射峰的2θ值稍大于Pt/C催化剂的相应值,表明P进入了Pt晶格,形成了Pt-P合金。电化学测试表明,Pt-P/C催化剂对氧还原的电催化性能要比商品化的E-TEKPt/C催化剂好,其还原电位正移了40mV。由于Pt-P/C催化剂中Pt-P粒子的平均粒径和相对结晶度与Pt/C催化剂相似,推测Pt-P/C催化剂对氧还原的电催化性能好于Pt/C催化剂的原因可能为P的作用。The carbon-supported Pt-P（Pt-P/C） catalyst（m（Pt）：m（P） = 5：1） was prepared with NaH2PO2 reduction method.The X-ray diffraction results indicate that the 2θ values of the Pt diffraction peaks of the Pt-P/C catalyst are slightly greater than those of the Pt/C catalyst,illustrating that P has entered into the crystal lattice of Pt and forms the Pt-P alloy.The electrochemical measurements demonstrated that the electrocatalytic performance of the Pt-P/C catalyst for the oxygen reduction is better than that of the commercial E-TEK Pt/C catalyst with 40 mV positive shift of reduction potential,which may be attributed to the P action because the average size and the relative crystallinity of the Pt-P particles in the Pt-P/C catalyst are similar to those in Pt/C catalyst.

关 键 词：质子交换膜燃料电池 碳载Pt-P催化剂 碳载Pt催化剂 氧还原 

分 类 号：O646[理学—物理化学]