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.
出处
《应用化学》
CAS
CSCD
北大核心
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
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
proton exchange membrane fuel cell
carbon-supported Pt-P catalyst
carbon-supported Pt catalyst
oxygen reduction
