American Chemical Society
ja300539p_si_002.pdf (4.94 MB)

Pt Nanoparticles@Photoactive Metal–Organic Frameworks: Efficient Hydrogen Evolution via Synergistic Photoexcitation and Electron Injection

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journal contribution
posted on 2012-05-02, 00:00 authored by Cheng Wang, Kathryn E. deKrafft, Wenbin Lin
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 (L1 and L2) and Zr63-O)43-OH)4(carboxylate)12 secondary building units, via MOF-mediated photoreduction of K2PtCl4. 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.