Recent Progress in Hydrogen Electrocatalysis

Table 2

Reaction free energy and free energy of activation for the Volmer reaction on the hydrogen scale [17].

Metal	Ag(111)	Ag(100)	Cu(111)	Cu(100)
Δ𝐺ad (eV)	0.39	0.48	0.10	0.14
Δ𝐺act (eV)	0.71	0.81	0.71	0.79