摘要
M-N4大环化合物由于良好的电催化活性和选择催化性,使其有望替代Pt应用于燃料电池阴极。介绍了M-N4大环化合物在阴极催化还原O2领域的相关研究。M-N4大环化合物催化还原O2存在两条方便的途径,即中心金属离子与O2之间的电子转移存在4e和2e两个过程。Fe大环化合物是一个4e催化还原O2过程,而多数Co大环化合物是一个2e催化还原O2过程,多核大环化合物可以促进O2催化还原的4e过程。中心金属离子氧化还原电势影响M-N4大环化合物催化还原O2的性能。
Macrocycles maybe possible alternatives to platinum catalyst due to its excellent electro-catalytic activity and the selected catalysing. The researches and development of M-N4 macrocycles to oxygen catalytic reduction reaction are introduced. There are two impossible routes to oxygen catalytic reduction. Electrons can be transferred between central metal ion and oxygen via 2e or 4e exchanging. The total number of exchanged electrons during the oxygen catalytic reduction on the Fe-macrocycles catalyst is 4, while the electron number on most of Co-macrocycles is 2. Poly- macrocycles can promote oxygen catalytic reduction via 4e exchanging. The influence of redox potential of central metal ion to M-N4 macrocycles catalytic activity towards oxygen reduction reaction is reviewed finally.
出处
《电池工业》
CAS
2008年第2期123-127,共5页
Chinese Battery Industry
基金
国家自然科学基金资助项目(编号20576106)
