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化学学报
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化学学报 ›› 1997, Vol. 55 ›› Issue (11): 1103-1107. 上一篇    下一篇

研究论文

浓碱溶液中铜阳极产物的阴极还原行为研究I: Cu(I)产物的阴极还原

何建波;李学良;林建新   

  1. 合肥工业大学化工学院
  • 发布日期:1997-11-15

Investigation on electro-reduction behaviour of copper anodic products in concentrated NaOH solutions I. Electro-reduction of Cu(I) products

HE JIANBO;LI XUELIANG;LIN JIANXIN   

  • Published:1997-11-15

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采用特定的电势扫描程序测出了浓碱溶液中Cu(I)阳极产物的多重还原电流峰。根据各峰之间转化或竞争的关系, 提出了亚铜氧化物的吸附成相和溶解沉淀两种途径共存的形成机理。为确定各阴极峰的归属, 本文采用了将阴极电流峰与XRD和XPS特征峰进行半定量对比的方法。

关键词: 铜, 阴极, Ｘ射线衍射分析, 还原, Ｘ射线光电子谱法, 电极反应, 氧化亚铜

Specific potential scan programs have been used to investigate the electro-reduction behaviour of cuprous oxides anodically formed on copper electrodes in concentrated NaOH solutions. The obtained voltammograms exhibit 3 cathodic current peaks. The peak charges are closely related to anodic polarization potential, polarization time and potential scan rate. These cathodic peaks have been semi-quantitatively contrasted with XRD and XPS spectra to identify anodic products reduced under each cathodic peak. A complex model including adsorption-crystallization and dissolution-precipitation mechanisms for the formation of cuprous oxide is proposed.

Key words: COPPER, CATHODE, X-RAY DIFFRACTION ANALYSIS, REDUCTION, X-RAY PHOTOELECTRON SPECTROMETRY, ELECTRODE REACTION

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