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An assessment of the dual capacitor model for the metal—electrolyte double layer

1977; Elsevier BV; Volume: 22; Issue: 5 Linguagem: Inglês

10.1016/0013-4686(77)85115-3

1873-3859

Ian L. Cooper, J.A. Harrison,

Spectroscopy and Quantum Chemical Studies

The long-accepted subdivision of the double layer at the metal—electrolyte interface into compact and diffuse regions, resulting in Grahame's construction of a concentration-independent compact layer capacity, is shown to be a consequence of certain unreasonable assumptions and approximations. Theoretical treatments of the double layer involving the orientational behaviour of a layer of water molecules between a charged metal surface and a layer of charge at the outer Helmholtz plane are shown to be quite unrealistic.