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Citation: Wu Hui-Huang, Wu Bao-Zhang, Zhou Shao-Min. Electrochemistry and XPS of Palladium Oxides[J]. Acta Physico-Chimica Sinica, ;1992, 8(04): 519-522. doi: 10.3866/PKU.WHXB19920418 shu

Electrochemistry and XPS of Palladium Oxides

1.
Department of Chemistry, Xiamen Univeristry, Xiamen 361005

Received Date: 15 January 1991
Available Online: 15 August 1992

Palladium oxide electrodes were prepared by decomposition of Pd(NO_3)_2 or thermal oxidation of Pd, their voltammetric characteristics were found to be dependent on preparation methods. XPS analysis showed that these electrodes had different compo-sitions. The impedance behavour of the electrodes can be presented with a simple eguivalent circuit containing a constant phase-angle element, indicating the microin-homogeneity of the oxide layers. The pH-sensing properties of the electrodes were measured and the pH response mechanism was discussed.
- Palladium oxides; pH sensor; XPS analysis; Impedance spectroscopy
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