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73 Properties of electrochemical tabilization and oxygen reduction behavior on glassy carbon modified electrode with a poly (Ni (II) - tetramethyldibenzotetraazo [14] nnulene) film Shyh-Jiun Liu* Wan-Ting Tzeng Department of Nature Science Education, National Tainan Teachers College Chia-Chin Chang E-one Moli Energy Corp. ABSTRACT Ni(tmdbta) is one of the Tetraazomacrocyclic nickel(ii) complex, where tmdbta is tetramethyldibenzotetraaza[14] annulene, which is employed to exploit the catalytic behavior of transition metal compound under usual medium. The surface of glassy carbon is modified with a thin film as [Ni(tmdbta)]n when oxidative electropolymerization of Ni(tmdbta) in dichloromethane. After 6 scans, the color green polymer film is obtained. And then the nickel-based chemically modified electrode(cme) show good stability in alkaline buffer solution for 150 scans. Both the anodic and cathodic waves exhibit a marked increase in peak current until a steady voltammetric profile is reached. The electrochemical properties of nickel-based chemically modified electrode are studied by different voltage scanning range. The nickel-based CME on glassy carbon electrode is very stable and exhibits good electrochemical stability in alkaline buffer solution. The electrochemical behavior of nickel-based CME in oxygen saturated solution is shown that the behavior of oxygen reduction is inhibited by nickel-based CME and independent of the varying ph of alkaline buffer solution. Key wordscyclic voltammetrychemically modified electrodemacrocyclic nickel complex oxidative electropolymerizationoxygen reduction