高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (4): 392.

• 研究论文 • 上一篇    下一篇

RuO2电极的XPS和UPS研究

崔成强, 姚士冰, 周绍民   

  1. 厦门大学化学系
  • 收稿日期:1987-09-28 出版日期:1989-04-24 发布日期:1989-04-24
  • 通讯作者: 崔成强
  • 基金资助:

    福建省自然科学基金

Studies on RuO2Electrode by XPS and UPS

Cui Chengqiang, Yao Shibing, Zhou Shaomin   

  1. Xiamen University, Xiamen
  • Received:1987-09-28 Online:1989-04-24 Published:1989-04-24

摘要: 应用XPS和UPS研究了不同烧结温度下制备的RuO2电极表面组成和价带结构。实验表明,电极表面的O/Ru原子比、I(σ+π)/1(π*)强度比和π*结合能随烧结温度升高而增大,意味着费米能级边d电子密度减少和RuO2更难氧化为活性中间体RuO4。我们认为RuO2电极析氧活性中心是缺氧结构而不是RuO3。解释了电极的电催化活性随烧结温度升高而降低的原因。

关键词: RuO2电极, 缺氧结构, 电催化, XPS, UPS, 析氧反应

Abstract: The surface compositions and valence band structures of RuO2electrodes prepared at different sintering temperatures have been studied by means of XPS and UPS. It was shown that O/Ru atomic ratio, I (σ + π)/I(π*) intensity ratio and the π* binding energy increase with the increasing of the sintering temperature, indicating the decreasing of the density of d-electron beneath Fermi level and the difficulty of RuO2to be oxidized to activation intermediate RuO4.On the basis of the facts above we suggested that the active sites of RuO2etectrode for oxygen evolution are oxygen-deficiency rather than RuO3· The fact that the electrocatalytical activation of RuO2electrode decreases as the sinterering temperature increasing was also explained.

Key words: RuO2Electrode, Oxygen-deficiency, Electro-catalysis, XPS,UPS,Oxygen evolution

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