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Electrode potential and double layer

Electrocatalysis

Theory of electrocatalysis

  1. S. Trasatti

Published Online: 15 DEC 2010

DOI: 10.1002/9780470974001.f202009

Handbook of Fuel Cells

Handbook of Fuel Cells

How to Cite

Trasatti, S. 2010. Electrode potential and double layer. Handbook of Fuel Cells. .

Author Information

  1. University of Milan, Milan, Italy

Publication History

  1. Published Online: 15 DEC 2010

Abstract

This chapter describes the structure of electrode/solution interfaces and the origin of the electrode potential. Equilibrium conditions are considered. The energy of particles in a phase, the equilibrium between phases and the origin and the physical significance of electrode potentials are discussed. Two main systems are considered: metal/solution and oxide/solution interfaces. Potential of zero charge for the former and point of zero charge for the latter are defined. The structure of the interface and its dependence on a number of parameters such as electrode potential, crystallographic orientation, nature of the solid, etc. are discussed. The fundamental importance of the interaction between the solid and the solvent and its influence on adsorption phenomena is stressed.

Keywords:

  • electrode potential;
  • electrical double layer;
  • electron work function;
  • Nernst equation;
  • potential of zero charge;
  • point of zero charge;
  • adsorption isotherm