fig3

Figure 3. (A) Conceptual diagram of the reaction model for the electrocatalytic semihydrogenation of alkyne to (Z)-alkene on a Pt-Pd electrocatalyst. This figure is quoted with permission from Nogami et al.^[28]; (B) Proposed mechanism for the electrocatalytic hydrogenation of BA using a PtRu catalyst in a PEM rector. This figure is quoted with permission from Fukazawa et al.^[29]. BA: Benzoic acids; PEM: polymer electrolyte membranes.