title: Pt nanoparticles@photoactive metal-organic frameworks: efficient hydrogen evolution via synergistic photoexcitation and electron injection.
abstract: Pt nanoparticles of 2-3 nm and 5-6 nm in diameter were loaded into stable, porous, and phosphorescent metal-organic frameworks (MOFs 1 and 2) built from [Ir(ppy)(2)(bpy)](+)-derived dicarboxylate ligands (L(1) and L(2)) and Zr(6)(μ(3)-O)(4)(μ(3)-OH)(4)(carboxylate)(12) secondary building units, via MOF-mediated photoreduction of K(2)PtCl(4). The resulting Pt@MOF assemblies serve as effective photocatalysts for hydrogen evolution by synergistic photoexcitation of the MOF frameworks and electron injection into the Pt nanoparticles. Pt@2 gave a turnover number of 7000, approximately five times the value afforded by the homogeneous control, and could be readily recycled and reused.
authors.affiliation: Department of Chemistry, CB#3290, University of North Carolina, Chapel Hill, North Carolina 27599, USA.
authors.forename: Cheng
authors.initials: C
authors.lastname: Wang
authors.forename: Kathryn E
authors.initials: KE
authors.lastname: deKrafft
authors.forename: Wenbin
authors.initials: W
authors.lastname: Lin