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将金属钴离子引入磷酸铝分子筛APO-5制得CoAPO-5分子筛,再把N,N-双水杨醛缩乙二胺(SALEN)希夫碱通过扩散进入CoAPO-5分子筛孔道并与其中的钴离子配位,形成了CoSALEN配合物,构成CoSALEN/APO-5复合材料.应用物理吸附法,以聚苯乙烯(PS)作粘结剂,将CoSALEN/APO-5涂敷在玻碳电极表面制成修饰电极PS/CoSALEN/APO-5/GCE.循环伏安法(CV)、计时电流法(CA)研究了该修饰电极在不同pH电解质溶液中的电化学行为以及对分子氧的催化还原作用.结果表明,制备的修饰电极能有效地催化分子氧的四电子还原,即氧气被电催化还原为水,据此提出可能的氧还原机理.
The metal cobalt ions are introduced into the APO-5 aluminum phosphate molecular sieve to obtain CoAPO-5 molecular sieve, and then the N, N-bis salicylaldehyde ethylenediamine (SALEN) Schiff base diffuses into the pores of the CoAPO-5 molecular sieve and interacts with CoSALEN complex was formed to form CoSALEN / APO-5 composite.Polystyrene (PS) was used as binder to coat CoSALEN / APO-5 on the surface of glassy carbon electrode The electrochemical behavior of the modified electrode in different pH electrolyte solutions and the catalytic reduction of molecular oxygen were investigated by cyclic voltammetry (CV) and chronoamperometry (CA) The results show that the prepared modified electrode can effectively catalyze the four-electron reduction of molecular oxygen, that is, the oxygen is electrocatalytically reduced to water, thus providing a possible oxygen reduction mechanism.