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Mo(Ⅵ)还原产物催化NO2-的极谱研究

Polarographic Investigation on the Catalyzed Reduction of Nitrite by the Reduction Product of Mo (Ⅵ)

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【作者】 江子伟逯晓燕陈玉萍高小霞

【Author】 Jiang Ziwei, Lu Xiaoyan, Chen Yuping, Gao Xiaoxia (Department of Chemistry)

【机构】 北京大学化学系北京大学化学系

【摘要】 Mo(Ⅵ)在pH 2~3,0.1mol/L KCl溶液中能被还原,其电位为-0.45V(对Ag/AgCl)。还原产物能沉积在滴汞上,它能催化N02-的还原。NO2-的还原电位从-0.95V(对Ag/AgCl)正移到-0.81V。NO2-还原峰电流的大小正比于它的浓度,NO3-在很宽的浓度范围内不干扰。本文对NO2-和NO3-在Mo存在时的极谱行为作了探讨。

【Abstract】 The reduction of Mo(Ⅵ) at -0.45V vs Ag/AgCl in a pH 2-3. Solution of 0.1 mol/1 KC1, results in a deposit on mercury electrode which catalyzes nitrite reduction. The potential of the nitrite reduction peak moves from -0.95V to -0.81V vs Ag/ AgCl. A peak is developed in direct proportion to nitrite concentration. Nitrate does not interfere in a wide concentration range. The mechanism for the Mo-catalyzed nitrite reduction is suggested.

【关键词】 钼酸盐亚硝酸根硝酸根催化极谱
【Key words】 MolybdateNitriteNitrateCatalystPolarography
  • 【文献出处】 北京大学学报(自然科学版) ,Acta Scicentiarum Naturalum Universitis Pekinesis , 编辑部邮箱 ,1989年02期
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