A platinum promoted Ag/SBA-15 catalyst effective in selective oxidation of methanol - design and surface characterization.

ABSTRACT: The aim of this study was better understanding of surface properties of bimetallic (silver-platinum) catalysts and to verify if a very small addition of platinum (ca. 0.05 wt%) to silver (ca. 2.0 wt%) loaded on ordered mesoporous silica, SBA-15, would improve the catalytic properties of bimetallic Ag-Pt materials in selective oxidation of methanol to methyl formate. Ag-Pt catalysts were prepared by one-step and step-by-step procedures and the final Ag/Pt molar ratio in the respective samples was equal to 86 and 63. The catalysts were characterized after calcination and different activation treatments (in Ar and O₂). X-ray diffraction, UV-vis and XP spectroscopy confirmed the lack of Ag-Pt alloy crystallites in the samples and also evidenced a higher resistance of s

SUBMITTER: Wisniewska J 

PROVIDER: S-EPMC9051898 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature