CIESC Journal

• 化工学报 • 上一篇    下一篇

RuO_2-SnO_2电极的XPS研究与氧化物表面的酸碱性

陈延禧,夏晓霞,陈艳英,韩佐青   

  1. 天津大学应用化学系!天津300072,天津大学应用化学系!天津300072,天津大学应用化学系!天津300072,天津大学应用化学系!天津300072
  • 出版日期:1995-10-25 发布日期:1995-10-25

RuO_2-SnO_2 ELECTRODE XPS STUDIES AND ACID-BASE PROPERTIES OF OXIDE SURFACE

Chen Yanxi.Xia Xiaoxia.Chen Yanying and Han Zuoqing(Department of Applied Chemistry,Tianjin University Tianjin 300072)   

  • Online:1995-10-25 Published:1995-10-25

摘要: 研究了RuO_2-SnO_2混合金属氧化物电极,它对NaCl溶液中的析氯反应具有良好的电催化活性及选择性。采用XPS(X射线光电子光谱)研究了电极表画的组成,发现金属阳极〔DSA(Ru-Sn〕表面的钌含量和吸附氯含量均高于DSA(Ru-Ti)。采用电位滴定法研究电极表面酸碱性,测定了零电荷点(PZC)和零电荷点的移动(ΔPZC)的数值,显示了DSA(RuO_2-SnO_2)表面的酸性更强,Cl的特性吸附也更强。由此得出:混合金属氧化物电极的电催化行为与其表面组成及性质存在密切关系。

Abstract: A RuO2 -SnO2 mixed metal oxides electrode was investigated. The results showed that it has a good activity and selectivity for C12 evolution electrocatalysis in NaCl solution. By means of XPS the surface composition of electrode was studied. It was found that Ru content and adsorbed chlorine of DSA (Ru -Sn) was higher than DSA (Ru -Ti). Potentiometric titration was used to characterize the acid - base properties of the surface of mixed electrodes. PZC and APZC obtained suggested that DSA (Ru -Sn) surface has stronger acidity and more specific adsorption of Cl . The electrocataysis behavior of mixed metal oxides electrode is in a close relationship with surface composition and properties.

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