PEMFC催化剂的研究:自制Pt/C电催化剂的性质  

Studies on PEMFC Electrocatalysts: Physicochemical Characterization of Homemade Pt/C Electrocatalyst

作　　者：李莉[1] 王恒秀[1] 徐柏庆[1] 李晋鲁[1] 邢魏[2] 毛宗强[3] 

机构地区：[1]清华大学化学系一碳化学与化工国家重点实验室,北京100084 [2]中国科学院长春应用化学研究所,长春130022 [3]清华大学核能技术设计研究院,北京100084

出　　处：《物理化学学报》2003年第4期342-346,共5页Acta Physico-Chimica Sinica

基　　金：国家重点基础研究发展规划(G2000026408)项目;教育部"优秀跨世纪人才"和国家杰出青年基金(20125310)资助课题~~

摘　　要：研究了一种用于质子交换膜燃料电池(PEMFC)的自制Pt/C电催化剂(标记为THYT-1)的物理化学和电化学性质.将THYT-1电催化剂与E-TEK公司的同类电催化剂的组成、形态及电催化性能进行了比较.单电池测试结果显示,THYT-1的电催化性能优于E-TEK电催化剂.CV测试结果表明CO在这两种电催化剂上的电氧化性能相近;TEM分析表明两种催化剂上Pt晶粒在炭载体上呈均匀分布,平均粒径均为2～3nm;XPS和XRD测试结果表明两种催化剂中Pt主要以金属态存在.这些数据表明THYT-1催化剂的物理化学性质与E-TEK公司的相类似.A homemade Pt/C electrocatalyst (named as THYT-1) for proton-exchange membrane fuel cell (PEMFC) was prepared and characterized comprehensively. Single-cell measurements. showed that the performance of THYT-1 for hydrogen electro-oxidation was superior to that of the E-TEK Pt/C catalyst. Cyclic voltammetry measurements in a half PEM fuel cell indicated that the electro-oxidation behavior of adsorbed CO on THYT-1 and the E-TEK Pt/C catalyst was indistinguishable. XPS and XRD detections showed that platinum of the two catalysts exist mainly in the metallic state. Uniformly dispersed Pt-particles with sizes of 2 similar to 3 nm were found to be the dominant images of Pt in the TEM micrographs for both THYT-1 and the E-TEK catalysts. Application of THYT-1 catalyst in the research and development of PEMFC technology can be expected.

关 键 词：PEMFC催化剂 PT/C电催化剂 质子交换膜燃料电池 碳负载铂催化剂 

分 类 号：O643.3[理学—物理化学]