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Bimetallic Pt–Re Nanoporous Networks: Synthesis, Characterization, and Catalytic Reactivity

The preparation of bimetallic nanoporous networks (BNNs) that combine the high surface area and thermal stability of inorganic nanostructures with the unique catalytic properties of bimetallic systems is highly desirable. Here we show a simple and highly versatile approach for synthesis of Pt–Re BNN and demonstrate the influence of preparation conditions on the BNN structure, composition, and catalytic reactivity. Pt–Re BNN was prepared by reduction of double complex [Pt(NH3)4][Re(Cl6)] salt crystals, in which two oppositely charged metal complexes are evenly distributed in each unit cell in a 1:1 ratio. Exposure of the salt crystals to reducing conditions induced the evaporation of the inorganic ligands, collapse of the salt structure, and reduction of the metal ions for the formation of high-surface-area Pt–Re BNNs. Single-particle X-ray fluorescence tomography and various ensemble-based spectroscopy measurements (X-ray photoelectron spectroscopy and X-ray absorption near edge spectroscopy) identified t...