Question

According to the energy profile as shown below, please explain two approaches to facilitate charge transfer across the boundary of electrode and electrolyte. Please explain both reduction reaction and oxidation reaction process. (hint: charge transfer toward opposite direction in reduction and oxidation). Free Energy Red Me + eMe AG = AG+fFA — Reduction .... Equilibrium - - Oxidation Arrhenius expression AG Butler-Volmer expression The potential difference between the 1 electrode surface and the outer Helmholtz plane can be varied to get a net reduction or oxidation Reaction Coordinate

Answer 1

As shown in figure in question , According to concept of Gibb's free Energy i.e the Reaction going in feasible direction should have lower value of Gibb's free Energy .

In the figure , It is specified that the Oxidation reaction is having lower Gibbs Free energy than that of reduction reaction, So , that the Me -> Me⁺ + e^- is more feasible than that of Reduction reaction i.e Me⁺ + e^- -> Me.

Reduction reaction require more energy than that of oxidation for to get spontinity.