| 阴离子Cl- NO-3 ClO-4对Pb2+/Ag UPD体系行为的影响研究 |
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| 引用本文： | 王春明,杜永令,佟浩.阴离子Cl- NO-3 ClO-4对Pb2+/Ag UPD体系行为的影响研究[J].兰州大学学报(自然科学版),2002,38(3):54-57. |
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| 作者姓名： | 王春明 杜永令 佟浩 |
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| 作者单位： | 兰州大学化学化工学院,甘肃兰州,730000 |
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| 基金项目： | 国家自然科学基金资助项目 (2 0 0 730 17) |
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| 摘 要： | 研究了 Pb2 / Ag欠电位沉积 (UPD)体系在不同阴离子 (Cl-,NO-3 ,Cl O-4)存在下的行为 .发现 Pb2 UPD峰电位随溶液中 Cl-离子浓度增加负向移动 ,而随溶液中 Pb2 离子浓度增加正向移动 ;NO-3 在银电极上不但有吸附而且有反应 ,但其吸附竞争力较 Cl-而言明显较弱 ;Cl-的诱导吸附有利于取得稳态条件下 UPD Pb的最大表面覆盖度 ;Cl O-4则未发现有明显的吸附行为 .
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| 关 键 词： | 欠电位沉积 铅 银电极 阴离子 |
| 文章编号： | 0455-2059(2002)03-0054-04 |
| 修稿时间： | 2001年6月12日 |
The investigations of the effect of anion Cl-,ClO-4 and NO-3 on the behavior of Pb2+/Ag UPD system |
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| WANG Chun ming,DU Yong ling,TONG Hao.The investigations of the effect of anion Cl-,ClO-4 and NO-3 on the behavior of Pb2+/Ag UPD system[J].Journal of Lanzhou University(Natural Science),2002,38(3):54-57. |
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| Authors: | WANG Chun ming DU Yong ling TONG Hao |
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| Abstract: | The effect of anions such as Cl -,ClO - 4 and NO - 3 on UPD Pb 2 /Ag system was investigated with cyclic voltammetry,linear scan voltammetry and chronocoulemetry.It's found that the peak potential of Pb 2 UPD on silver electrode shifted negatively with increasing Cl - concentration and positively with increasing Pb 2 concentration.NO - 3 also possesses strongly adsorptive behavior on silver electrode and shows electrode reaction.However,the adsorptive competition of NO - 3 is obviously weaker than that of Cl -.The induced absorption of Cl - is an advantage to the monolayer formation of UPD Pb 2 .There is no adsorption of ClO - 4 to be found. |
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| Keywords: | underpotential deposition lead rotating silver disk electrode anion effect |
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