摘要
研究了一种通过固相加热一步合成碳载钴酞菁复合催化剂(CoPc/C)的制备方法.通过XRD,IR对制备的催化剂进行了表征.结果显示,得到的产物为CoPc/C,平均粒径30nm.利用极化曲线和交流阻抗等电化学方法测试了其在碱性介质中对氧还原的催化性能.该催化剂在碱性介质中(6mol·L-1KOH)空气气氛下,氧还原的初始电位达到0V,电极电位为-0.10V vs·Hg/HgO时电流密度达到100mA·cm-2,有显著的氧还原电催化效果.对实验得到的极化曲线及交流阻抗数据进行拟合处理及计算,获得相关动力学参数.
The preparation and catalytic activity of carbon supported Co-phthalocyanine compounds （CoPc/C） as electrocatalyst for oxygen reduction was studied. This composite was synthesized in one step through heat-treatment. The catalysts were characterized by XRD, IR techniques. The result showed that the product was the CoPc/C with the average particle size of 30 nm. The catalytic performance and mechanism of catalysts for ORR were investigated by electrochemical methods, such as cathode polarization and AC impedance measurements. The onset potential of oxygen reduction reaction is 0 V （vs. Hg/HgO） and the current density can reach 100mA cm^-2 at -0.1V. The relevant kinetic parameters were obtained through simulation and calculation of the electrochemical test results.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2010年第1期37-44,共8页
Journal of Molecular Catalysis(China)
关键词
酞菁钴
氧还原
碳载体
阴极极化
交流阻抗
Cobah-phthalocyanine
Oxygen reduction
Carbon supports
Cathode polarization
AC impedance
