摘要
制备了碳载酞菁钴(CoPc/C)催化剂及气体扩散电极;在酸性介质中,用循环伏安、线性扫描伏安法研究了CoPc/C的氧还原性能;考察了催化剂的热处理温度和载量对电极氧还原性能的影响。经700℃热处理的催化剂性能较好,气体扩散电极中催化剂的适宜载量为5 mg/cm2,电极具有良好的耐甲醇性能。交流阻抗谱的模拟结果显示,气体扩散电极的氧还原反应由电荷传递阻抗和电化学吸附阻抗共同决定。
Carbon-supported cobalt phthalocyanine（CoPc/C）eatalyst and gas diffusion electrode were prepared. Cyclic vohammetry and linear sweep vohammetry were used to research the oxygen reduction performance of CoPc/C in acid solution. The influences of heat-treating temperature and loadings of the catalyst on the oxygen reduction performance of electrode were studied. Catalyst heat-treating at 700℃ exhibited higher performance, the optimal catalyst loading at gas diffusion electrode was 5 mg/ cm^2, the tolerance of electrode towards methanol was good. AC impedance spectroscopy simulating results showed that the oxygen reduction reaction on the gas diffusion electrode was dominated bv charge transfer resistance and electrochemical adsorption resistance.
出处
《电池》
CAS
CSCD
北大核心
2009年第3期145-147,共3页
Battery Bimonthly
基金
广东省科技计划项目(2008B010800036)
广州市教育局项目(62043)
关键词
酞菁钴(CoPc)
氧还原
气体扩散电极
交流阻抗
cobalt phthalocyanine（CoPe）
oxygen reduction
gas diffusion electrode
AC impedance
