Sonophotodeposition of Bimetallic Photocatalysts Pd–Au/TiO2: Application to Selective Oxidation of Methanol to Methyl Formate. Issue 10 (11th February 2015)

• Record Type: Journal Article
• Authors: Colmenares, Juan C.; Lisowski, Paweł; Łomot, Dariusz; Chernyayeva, Olga; Lisovytskiy, Dmytro
• Is Part Of: ChemSusChem. Volume 8:Issue 10(2015:May)
• Page Start: 1676
• Page End: 1685
• Publication Date: 2015-02-11
• Subjects: gold -- nanoparticles -- oxidation -- palladium -- sonophotodeposition; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201403125
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: The aim of this work is to develop bimetallic Pd–Au/TiO2 P90 systems, which are highly active and selective for the photocatalytic oxidation of methanol to form methyl formate. Modification of commercial TiO2 P90 with Pd–Au nanoparticles was successfully achieved for the first time by means of a sonophotodeposition (SPD) method. The prepared materials were characterized by TEM, UV/Vis spectroscopy, X‐ray photoelectron spectroscopy, and powder XRD. The Pd–Au bimetallic nanoparticles supported on titania exhibited remarkably enhanced catalytic activity in selective methanol oxidation to form methyl formate due to the synergism of Au and Pd particles, as well as the strong interaction between TiO2 and Pd–Au. SPD is a green methodology that can be used to prepare well‐defined bimetallic surfaces on semiconductor supports with great promise for catalytic applications, in which selectivity can be tuned through adjustment of the surface composition. Abstract : The light of sounds in catalysis : An unconventional, soft technique that combines the advantages of sonication and photodeposition (sonophotodeposition) is reported. This offers enormous possibilities for the synthesis of a broad spectrum of mono‐ and bimetallic nanostructured photocatalysts for a green and sustainable photocatalytic selective oxidation of methanol to form methyl formate.