Narrow Results

Meso-tetrakis(p-sulfonatophenyl)porphyrin (TPPS₄) functionalized platinum nanocomposites were synthesized and characterized using ultraviolet-visible absorption spectroscopy (UV-vis), fluorescence spectroscopy (FL), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and X-ray diffraction (XRD) methods. The postulated configuration of TPPS₄ functionalized platinum nanocomposite may be described as an antenna system containing a photoreceptive TPPS₄ shell and a nanosize platinum core. Fluorescence and photoelectrochemistry studies of both TPPS₄ and the platinum nanocomposites showed that efficient electron/energy transfer occurred from the TPPS₄ donor to the metallic nanocore acceptor. TPPS₄ functionalized platinum nanocomposites are photocatalytic active for water reduction to produce hydrogen. The turnover numbers (TON_Pt and TON_TPPS4) and quantum yield of hydrogen (ϕ_H2) for the photocatalyst (n_Pt:n_TPPS4= 250) were 44, 11056, and 1.8%, respectively, calculated on the basis of the total amount of H₂ evolution for 12 h irradiation.

We demonstrate here a facile and effective strategy to prepare reduced graphene oxide-platinum nanoparticle (RGO-PtNP) nanohybrids by the mediation of graphite-specific peptide (GSP). For the first time, we found that GSP can be used to modify RGO non-covalently in one way, and in another way promote the formation of PtNPs on RGO as a biomolecular bridge. The created RGO-PtNP nanohybrids show enhanced electrocatalytic activity toward H₂O₂ and can be utilized to fabricate non-enzymatic electrochemical H₂O₂ sensor.