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Abstract We explored a co‐dissolved strategy to embed mono‐dispersed Pt center into V 2 O 5 support via dissolving PtV 9 O 28 7− into V 10 O 28 6− aqueous solution. The uniform dispersion of PtV 9 O 28 7− in V 10 O 28 6− solution allows PtV 9 O 28 7− to be surrounded by V 10 O 28 6− clusters via a freeze‐drying process. The V centers in both PtV 9 O 28 7− and V 10 O 28 6− were converted into V 2 O 5 via a calcination process to stabilize Pt center. These double separations can effectively prevent the Pt center agglomeration during the high‐temperature conversion process, and achieve 100 % utilization of Pt in PtV 9 O 28 7− . The resulting Pt‐V 2 O 5 single‐atom‐site catalysts exhibit a CH 4 yield of 247.6 μmol g −1 h −1 , 25 times higher than that of Pt nanoparticle on the V 2 O 5 support, which was accompanied by the lactic acid photooxidation to form pyruvic acid. Systematical investigations on this unambiguous structure demonstrate an important role of Pt−O atomic pair synergy for highly efficient CO 2 photoreduction.
Wang et al. (Wed,) studied this question.