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高等学校化学研究 ›› 2004, Vol. 20 ›› Issue (4): 494-500.

• Articles • 上一篇    下一篇

Thermodynamic Foundation for High Temperature Electrochemistry

ZHANG W., E. A. Charles, J. Congleton   

  1. Corrosion Research Group, School of Chemical Engineering & Advanced Materials, University of Newcastle upon Tyne, NE1 7RU, UK
  • 收稿日期:2004-01-03 出版日期:2004-08-24 发布日期:2011-08-06

Thermodynamic Foundation for High Temperature Electrochemistry

ZHANG W., E. A. Charles, J. Congleton   

  1. Corrosion Research Group, School of Chemical Engineering & Advanced Materials, University of Newcastle upon Tyne, NE1 7RU, UK
  • Received:2004-01-03 Online:2004-08-24 Published:2011-08-06

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摘要： Thermodynamic concepts required for the thermodynamic calculation of the potentials of electrodes for high temperature applications are briefly reviewed.A thermodynamic approach to the calculation of half cell potentials and the standard chemical potential of an electron at high temperatures which are related to the Standard Hydrogen Electrode(SHE) is discussed.As examples, an external Ag/AgCl reference electrode and a YSZ (Ag|O2) pH sensor for high temperature applications are analyzed by using the thermodynamic approach to derive a high temperature pH measurement equation.The two electrodes are employed to measure high temperature pH and the measured pH was compared with the calculated pH by using a solution chemistry method.Concepts and principles for electrode kinetics are also briefly introduced and a modification to the Tafel equations is suggested.

关键词: High temperature potential, Half cell potential, External Ag/AgCl reference electrode, Standardchemical potential of an electron, High temperature pH sensor

Abstract: Thermodynamic concepts required for the thermodynamic calculation of the potentials of electrodes for high temperature applications are briefly reviewed.A thermodynamic approach to the calculation of half cell potentials and the standard chemical potential of an electron at high temperatures which are related to the Standard Hydrogen Electrode(SHE) is discussed.As examples, an external Ag/AgCl reference electrode and a YSZ (Ag|O2) pH sensor for high temperature applications are analyzed by using the thermodynamic approach to derive a high temperature pH measurement equation.The two electrodes are employed to measure high temperature pH and the measured pH was compared with the calculated pH by using a solution chemistry method.Concepts and principles for electrode kinetics are also briefly introduced and a modification to the Tafel equations is suggested.

Key words: High temperature potential, Half cell potential, External Ag/AgCl reference electrode, Standardchemical potential of an electron, High temperature pH sensor