物理化学学报2011，Vol.27Issue(3)：604-608,5.
大孔炭载Pd催化剂对甲酸氧化的电催化性能
Electrocatalytic Performance of Pd Catalyst Supported on Macropore Carbon for Oxidation of Formic Acid
摘要
Abstract
The electrocatalytic performances of a Vulcan XC-72 carbon black supported Pd (Pd/XC)catalyst and a macroporous carbon supported Pd (Pd/MC) catalyst for formic acid oxidation in a direct formic acid fuel cell were investigated and compared. This was carried out using X-ray energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) spectroscopy, Raman spectroscopy, and electrochemical techniques. The cyclic voltammograms indicate that the main peak potentials for the oxidation of formic acid at the Pd/XC and Pd/MC catalyst electrodes are similar and they ara located at about 0.15 V.However, the peak current density of the Pd/MC catalyst electrode is about 30％ larger than that of the Pd/XC catalyst electrode. The chronoamperometric curves indicate that the peak current density at the Pd/MC catalyst electrode at 6000 s is about 38％ larger than that at the Pd/XC catalyst electrode. These results show that the electrocatalytic activity and stability of the Pd/MC catalyst for the oxidation of formic acid are better than those of the Pd/XC catalyst. Because the average size and relative crystaliinity of the Pd particles in the two catalysts are similar, the reason for the better electrocatalytic performance of the Pd/MC catalyst could be only attributed to its larger pore diameter and higher conductivity because of its highextent of MC graphitization.关键词
甲酸氧化/大孔炭/炭载Pd催化剂/电催化性能/直接甲酸燃料电池分类
化学化工引用本文复制引用
刘春艳,徐斌,唐亚文,曹高萍,杨裕生,陆天虹..大孔炭载Pd催化剂对甲酸氧化的电催化性能[J].物理化学学报,2011,27(3):604-608,5.基金项目
国家自然科学基金(20873065,21073094)资助项目 （20873065,21073094）
