Au/Pt/TiO2 catalysts prepared by redox method for the chemoselective 1,2-propanediol oxidation to lactic acid and an NMR spectroscopy approach for analyzing the product mixture

Subnano‐Sized Pt–Au Alloyed Clusters as Enhanced Cocatalyst for Photocatalytic Hydrogen Evolution

“…have fabricated heterostructures of Pt on Au nanoparticles, which showed high activity in catalyzing the formic acid oxidation . Kustov and co‐workers have demonstrated Pt–Au/TiO 2 as efficient catalysts in the formation of lactic acid . Corma and Budroni have prepared Pt–Au catalysts for the hydrogenation reaction of succinic anhydride .…”

“…Besides, the binding energies of Au can be 81.7 (4f 7/2 ) and 85.1 (4f 5/2) eV, slightly higher by 0.2 eV compared to metallic Au in reference (Figure b) . This phenomenon can be owed to the different work functions between Pt and Au, and the electrons can easily flow from Au atoms to Pt atoms, leading to an increase of the binding energy of Au . The electron transfer can increase the electron density on the Pt surface, and this should optimize the Pt‐H* coordination and thus the H* adsorption on the Pt surface would be more suitable in Pt–Au/T photocatalyst …”

“…[17] Kustov and co-workers have demonstrated Pt-Au/TiO 2 as efficient catalysts in the formation of lactic acid. [18] Corma and Budronih ave preparedP t-Au catalysts for the hydrogenation reactiono fs uccinic anhydride. [19] Recently,M aroneze et al have investigated an ultrasmall Au@Pt nanoalloy with around 1.8 nm that exhibits an increasedc atalytic activity of H 2 generation reaction.…”

“…[17] This phenomenon can be owed to the differentw ork functions between Pt and Au, and the electrons can easily flow from Au atoms to Pt atoms, leading to an increaseo ft he binding energy of Au. [18] The electron transfer can increase the electron density on the Pt surface, and this should optimize the Pt-H* coordination and thus the H* adsorptiono nt he Pt surfacew ould be more suitable in Pt-Au/T photocatalyst. [24] The photocatalytic H 2 generation rates of the as-prepared Pt-Au bimetallic nanoalloy clusters on TiO 2 nanosheets in water splitting reaction were tested in methanol aqueous solution as sacrificial agent.…”

Application of Silver Nanoparticles for Water Treatment

“…The selective deposition of Au on the surface of nanoparticles of a primary oxide-supported metal has been performed by a redox method that is based on the reduction of the second metal ions with hydrogen adsorbed on the surface of first metal or with itself [45].…”