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Electrified Interfaces. The structure of the electrical double layer. Refresher-Galvanic cells. line notation (shorthand) | interface between two phases. || salt bridge Cd(s) | CdCl 2 (aq, M) || AgNO 3 (aq, M) | Ag(s). Half-Reactions. E cell = E cathode (+) - E anode(-).

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electrified interfaces

Electrified Interfaces

The structure of the electrical double layer

refresher galvanic cells
Refresher-Galvanic cells

line notation (shorthand)

| interface between two phases. || salt bridge

Cd(s) | CdCl2(aq, M) || AgNO3(aq, M) | Ag(s)

slide3

Half-Reactions

Ecell= Ecathode (+) - Eanode(-)

slide4

Standard Hydrogen Electrode

Pt(s) | H2(g, A=1) | H+(aq, A=1) || Ag+(ag, A=1)

|_________________________|

NHE

H+(aq, A=1) + e-  1/2H2(g, A=1) E0=0 V

slide6

Nernst Equation

for a half-rxn

aOx + ne-  bRed

R= gas constant T= temperature in Kelvin

n= no. of electrons in half-rxn

F= Faraday constant (96485 C/mol)

A= activity (= 1 for a pure solid, liquid or solvent and expressed in mol/L for solutes and in bar for gases)

current model
Current Model

BDM (Bockris, Devanathan, Muller)