fig8

Figure 8. (A) Top view and side view of the most stable configuration of Pt₁ on PMA/graphene, based on DFT calculations^[165]; (B) Catalytic performance of PMA/AC, Pt/AC, and Pt-PMA/AC in hydrogenation reactions^[165]; (C) Illustration for the construction of Pt₁/TiO₂-600^[169]; (D) Accessibility of Pt₁ sites determined by CO pulse chemisorption of Pt₁/TiO₂-600 and Pt₁@TiO₂-600^[169]; (E) Catalytic performance of different catalysts in the hydrogenation of p-CNB at 80 °C under 15 bar H₂ within 1.5 h^[169]; (F) Structure of the Co₁/HOHC-M^[175]; (G) Time courses of NB conversion over Co₁/HOHC, Co₁/HOHC-M, Co-HCs, and Co-HCs-M^[175]. Pt₁: Single Pt atoms; PMA: phosphomolybdic acid; DFT: density functional theory; p-CNB: para-chloronitrobenzene; NB: nitrobenzene.