Hydrogen oxidation reaction Butler-Volmer equation

This is one of the few electrode reactions that does not follow the Butler-Volmer equation. The reason is that the dual-site dissociatidn of the H2 molecule is the rate-controlling step. But although this is a non-electrochemical step, the reaction rate is still a function of the potential, because the hydrogen oxidation is self-... 

The hydrogen oxidation reaction can be considered as sufficiently rapid and in this case jo °° and j7c 0. The Butler-Volmer equation can be linearised ... 

For a polarized electrode under steady-state current flow, the generalized reaction given by eq. (1.2) can be used to derive the Butler-Volmer equation, which involves energy barriers known as activation eneigies. Only the activation energy change is used for the forward (AG/) (reduction) and reverse (AGr) (oxidation) reactions. For example, the hydrogen reaction, 2e = H2 at... 

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