| NH3/NH4Cl中镍(Ⅱ)-丁二肟体系在悬汞电极上电化学还原机理的研究 |
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| 引用本文： | 金文睿,姜玮,杨清峰. NH3/NH4Cl中镍(Ⅱ)-丁二肟体系在悬汞电极上电化学还原机理的研究[J]. 物理化学学报, 1988, 4(4): 445-448. DOI: 10.3866/PKU.WHXB19880425 |
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| 作者姓名： | 金文睿 姜玮 杨清峰 |
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| 作者单位： | Department of Chemistry; Shandong University; Jinan |
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| 摘 要： |
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| 收稿时间： | 1987-01-06 |
| 修稿时间： | 1987-06-22 |
A STUDY ON THE MECHANISM OF THE ELECTROCHEMICAL REDUCTION OF NICKEL (Ⅱ) -DIMETHYLGLYOXIME SYSTEM ON HMDE IN NH3/NH4Cl |
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| Jin Wenrui,Jiang Wei,Yang Qingfeng. A STUDY ON THE MECHANISM OF THE ELECTROCHEMICAL REDUCTION OF NICKEL (Ⅱ) -DIMETHYLGLYOXIME SYSTEM ON HMDE IN NH3/NH4Cl[J]. Acta Physico-Chimica Sinica, 1988, 4(4): 445-448. DOI: 10.3866/PKU.WHXB19880425 |
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| Authors: | Jin Wenrui Jiang Wei Yang Qingfeng |
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| Affiliation: | Department of Chemistry; Shandong University; Jinan |
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| Abstract: | The behaviour of the Nickel(Ⅱ) ion in the presence of dimethyl-glyoxime (DMG) on the hanging mercury drop electrode in NH_3/NH_4Cl media was investigated with different electrochemical techniques. It was found that: (1) the reactant was Ni(Ⅱ) complex with DMG, Ni(Ⅱ)A_2, adsorbed on the electrode surface; (2) the intermediate was Ni(Ⅰ)A_2 and (3) the product was metal amalgam Ni(0)(Hg). Two electrons were transferred in the overall reaction and the transfer coefficient was 1.8 which was measured experimentally. From experimental results, it was obvious that the reaction orders with respect to Ni(Ⅱ), DMG and H~+ were 1,2, and 1, respectively. A new compound, X, was detected. The reaction scheme could be written as followsNi(Ⅱ)A_2+Hg<=>Ni(Ⅱ)A_2(ads)(Hg)Ni(Ⅱ)A_2(ads)(Hg)+e~-<=>Ni(Ⅰ)A_2(ads)(Hg)Ni(Ⅰ)A_2(ads)(Hg)+H~++e~-→Ni(0)(Hg)+HA(des)+A~-(des)→X+Hg |
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