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过渡金属大环配合物(例如酞菁和卟啉)对氧的电化学还原具有很高的催化活性,因而是目前电化学最活跃的研究领域之一.关于氧在过渡金属大环配合物上电化学还原机理,一般认为与过渡金属的价态变化有关.近年来,由于稀土双酞菁具有电致变色(electrochromic)的特性,引起了人们极大的兴趣,并对它们的电化学行为进行了一系列的研究,但关于它们对氧的电化学还原作用却未见报道.我们利用循环伏安法研究了某些稀土单酞菁和双酞菁对氧的电化学还原的影响,并提出了氧的电化学还原的反应历程.
Transition metal macrocycles, such as phthalocyanines and porphyrins, have high catalytic activity for the electrochemical reduction of oxygen and are therefore one of the most active electrochemical fields nowadays. Electrochemical reduction mechanism is generally considered to be related to valence changes of transition metals.In recent years, due to the electrochromic properties of rare earth bis-phthalocyanines, great interest has been drawn and their electrochemical behavior has been investigated A series of studies have been done but there is no report on their electrochemical reduction of oxygen.We studied the effect of some rare earth monophthalocyanines and bis-phthalocyanines on the electrochemical reduction of oxygen by cyclic voltammetry and proposed The reaction process of electrochemical reduction of oxygen.