Fig. 3: Hydrogenation of nitrobenzene.

a Catalytic performance for the hydrogenation of nitrobenzene by Pt2/mpg-C3N4 and other reference samples. b Recycling of Pt2/mpg-C3N4 for the catalytic hydrogenation of nitrobenzene. c Hydrogenation of functionalized nitroarenes catalyzed by Pt2/mpg-C3N4.