title: A versatile sonication-assisted deposition-reduction method for preparing supported metal catalysts for catalytic applications.
abstract: This work aims to develop a rapid and efficient strategy for preparing supported metal catalysts for catalytic applications. The sonication-assisted reduction-precipitation method was employed to prepare the heterogeneous mono- and bi-metallic catalysts for photocatalytic degradation of methyl orange (MO) and preferential oxidation (PROX) of CO in H2-rich gas. In general, there are three advantages for the sonication-assisted method as compared with the conventional methods, including high dispersion of metal nanoparticles on the catalyst support, the much higher deposition efficiency (DE) than those of the deposition-precipitation (DP) and co-precipitation (CP) methods, and the very fast preparation, which only lasts 10-20s for the deposition. In the AuPd/TiO2catalysts series, the AuPd(3:1)/TiO2catalyst is the most active for MO photocatalytic degradation; while for PROX reaction, Ru/TiO2, Au-Cu/SBA-15 and Pt/γ-Al2O3catalysts are very active, and the last one showed high stability in the lifetime test. The structural characterization revealed that in the AuPd(3:1)/TiO2catalyst, Au-Pd alloy particles were formed and a high percentage of Au atoms was located at the surface. Therefore, this sonication-assisted method is efficient and rapid in the preparation of supported metal catalysts with obvious structural characteristics for various catalytic applications.
authors.affiliation: Institute of Chemical and Engineering Sciences (ICES), Agency for Science, Technology and Research (A∗star), 1 Pesek Road, Jurong Island, 627833, Singapore; Stephenson Institute for Renewable Energy, Chemistry Department, The University of Liverpool, Crown Street L69 7ZD, Liverpool, United Kingdom.
authors.forename: Romen Herrera
authors.initials: RH
authors.lastname: Padilla
authors.affiliation: Stephenson Institute for Renewable Energy, Chemistry Department, The University of Liverpool, Crown Street L69 7ZD, Liverpool, United Kingdom.
authors.forename: Peter
authors.initials: P
authors.lastname: Priecel
authors.affiliation: Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A∗star), 2 Fusionopolis Way, Innovis, #08-03, 138634, Singapore.
authors.forename: Ming
authors.initials: M
authors.lastname: Lin
authors.affiliation: Stephenson Institute for Renewable Energy, Chemistry Department, The University of Liverpool, Crown Street L69 7ZD, Liverpool, United Kingdom. Electronic address: J.Lopez-Sanchez@liverpool.ac.uk.
authors.forename: Jose Antonio
authors.initials: JA
authors.lastname: Lopez-Sanchez
authors.affiliation: Institute of Chemical and Engineering Sciences (ICES), Agency for Science, Technology and Research (A∗star), 1 Pesek Road, Jurong Island, 627833, Singapore. Electronic address: Zhong_ziyi@ices.a-star.edu.sg.
authors.forename: Ziyi
authors.initials: Z
authors.lastname: Zhong
keywords: Photocatalysis; Precipitation–reduction; Preferential oxidation; Sonication; Supported metal catalyst