Chem. J. Chinese Universities

• 研究论文 • Previous Articles     Next Articles

Analysis on the Thermodynamic Stability of Noble Metal and Valve Metal Elements in PEM-water Electrochemical Reactors by Applying the pH-potential-stability Diagrams Method

CHA Chua-Sin*, HUANG Hong-Liang, WANG Qiang, LU Jun-Tao, ZHUANG Lin*   

  1. Department of Chemistry, Wuhan University, Wuhan 430072, China
  • Received:2008-10-08 Revised:1900-01-01 Online:2008-12-10 Published:2008-12-10

Abstract: Based on the analysis of distribution of interfacial potentials at various solid/PEM and solid/water interfaces within the PEM-water electrochemical reactors and well-known pH-potential diagrams, the construction of pH-potential-stability diagrams is suggested as a combination of these two methods to provide a clear-cut view of the stability problems of various materials in environments within various PEM-water electrochemical reactors. The pH-potential-stability diagrams of the noble metal and valve metal elements were constructed and employed in the analysis of the stability of these elements as electrocatalysts or construction materials in various PEM-water electrochemical reactors.

Key words: Polymer electrolyte membrane(PEM), Nafionfilm, PEM-water electrochemical reactor, pH-potential diagram, pH-potential-stability diagram, Solid/water interface

CLC Number: 

TrendMD: