Discrete Polyoxopalladates as Molecular Precursors for Supported Palladium Metal Nanoparticles as Hydrogenation Catalysts

• Published in: Inorganic chemistry Vol. 58; no. 9; pp. 5576 - 5582
• Main Authors: Ayass, Wassim W, Miñambres, Juan F, Yang, Peng, Ma, Tian, Lin, Zhengguo, Meyer, Randall, Jaensch, Helge, Bons, Anton-Jan, Kortz, Ulrich
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 06.05.2019
• ISSN: 0020-1669; 1520-510X
• DOI: 10.1021/acs.inorgchem.8b03513

We have used discrete polyoxopalladates­(II) (POPs) of the MPd12X8 nanocube- and Pd15X10 nanostar-types (M = central metal ion, X = capping group) as molecular precursors (diameter ca. 1 nm) for the formation of supported (SBA-15) metallic nanoparticles. These materials proved to be highly active in the hydrogenation of o-xylene. The characterization of such hydrogenation catalysts revealed that the average size of the resulting alloy particles is quite uniform with diameters ranging from 1 to 3 nm (indicating little to no agglomeration). The central transition-metal ion M n+ (MnII, FeIII, CoII, NiII, CuII, ZnII, PdII) in the POP structure and also the nature of the capping group (AsO4 3–, SeO3 2–, PO4 3–, phenyl-AsO3 2–) influence the resulting catalytic performance.