fig3
![Proton exchange membrane fuel cells: application for value-added chemical productions](https://image.oaes.cc/1de5641c-f286-4136-9d8f-d5812f60369f/cs3044.fig.3.jpg)
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.