Koutecky ndash Levich equation Eq was adopted to determine

The charge transfer coefficient represents the fraction of additional energy that goes toward the reaction at the electrode. Also the mass corrected Tafel slopes are calculated and reported in Table 3. According to literature [61], [62] and [63] and the reported slopes the adsorption dissociation of hydrogen on the catalyst surface is the rate determining step (Volmer), taking into consideration the Tafel–Heyrovsky–Volmer mechanism for HOR: