论文部分内容阅读
镍(Ⅱ)-丁二肟(DMG)体系在汞电极上的还原机理至今仍有争议。等提出了Ni(Ⅱ)与DMG形成的配合物Ni(Ⅱ)A_2作催化剂的氢催化波机理。Flora等解释为Ni(Ⅱ)A_2的二电子可逆还原到金属Ni.Nürnberg等认为反应是吸附在电极上的Ni(Ⅱ)A_2的不可逆还原。最近Weinzierl等又提出Ni(Ⅱ)催化DMG在电极上还原,这些研究中对判断机理的重要论据——中间产物及最终产物——却未进行过研究。本文用多种电化学方法对此体系进行了研究,提出了反应的机理。
The reduction mechanism of nickel (Ⅱ) -butyldioxime (DMG) system on mercury electrode is still controversial. Proposed hydrogen catalytic wave mechanism of the Ni (Ⅱ) A 2 complex formed by Ni (Ⅱ) and DMG as a catalyst. Flora et al. Explain that the two-electron reversible reduction of Ni (Ⅱ) A_2 to metallic Ni. Nürnberg et al. [3] considered the reaction to be an irreversible reduction of Ni (II) A_2 adsorbed on the electrode. Recently, Weinzierl et al. Proposed Ni (II) -catalyzed reduction of DMG on the electrode. However, no studies have been conducted on the important evidences for judging mechanism - intermediate products and final products. In this paper, a variety of electrochemical methods have been studied on this system, the reaction mechanism was proposed.