摘要
采用一种新的调变多元醇制备方法,通过调节碳载体热处理条件,制备得到不同的Pt/C燃料电池催化剂。采用p H计及物理吸附仪表征碳黑表面的含氧官能团和比表面积,利用电感耦合等离子光谱、X射线衍射、透射电镜和循环伏安法分别表征催化剂的成分、物相组成、微观组织形貌和电化学性能,并与进口的Johnson Matthey（JM）Pt/C催化剂的性能进行对比。结果表明：采用调变多元醇法,以400℃热处理碳黑作载体所制备的Pt/C催化剂的电化学比表面积达到83 m^2·g^-1,质量电流密度为49.03 A·g^-1。而进口催化剂JM 20%Pt/C的电化学比表面积为77 m^2·g^-1,质量电流密度仅11.13 A·g^-1,自制催化剂即使Pt载量降低3wt%～4wt%,其电催化活性仍优于进口催化剂。
Pt/C catalysts were prepared using a new modified polyol method with different heat treatment temperatures of Vulcan XC-72 carbon support.The oxygen containing functional group and the specific surface area of carbon black were characterized by p H meter and physical adsorption instrument.The composition,morphology and the electrochemical properties of the Pt/C catalyst were characterized by coupled plasma atomic emission spectroscopy,Transmission electron microscopy,X-ray diffraction and cyclic voltammograms,respectively.The results indicate that the Pt/C catalyst with 400 ℃ heat treatment for carbon black has an electrochemical specific surface area of 83 m^2·g^-1,and the quality of the current density of 49.03 A·g^-1,while the corresponding parameters for imported commercial JM 20% Pt/C catalyst are 77 m^2·g^-1and 11.13 A·g^-1,respectively.The Pt loading in the present work is decreased by 3wt% ～4wt% and the electric catalytic activity for the catalyst obtained in this work is better than that of commercial JM 20% Pt/C catalyst.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2015年第1期140-146,共7页
Chinese Journal of Inorganic Chemistry
基金
国家地区科学基金(No.51262015)
云南省基金(No.2011FB125)资助项目
关键词
催化
催化剂
PT/C
炭黑
微观结构
catalysis
catalysts
Pt/C
carbon black
microstructure
