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

Wassim W. Ayass, Juan F. Miñambres, Peng Yang, Tian Ma, Zhengguo Lin, Randall Meyer, Helge Jaensch, Anton-Jan Bons, Ulrich Kortz

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

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 Mn+ (MnII, FeIII, CoII, NiII, CuII, ZnII, PdII) in the POP structure and also the nature of the capping group (AsO43–, SeO32–, PO43–, phenyl-AsO32–) influence the resulting catalytic performance.
Original languageEnglish (US)
Pages (from-to)5576-5582
Number of pages7
JournalInorganic Chemistry
Volume58
Issue number9
DOIs
StatePublished - Apr 5 2019
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: U.K. acknowledges support by ExxonMobil and Jacobs University. W.W.A. thanks Deutscher Akademischer Austauschdienst (DAAD) for a doctoral fellowship, and P.Y. acknowledges CSC for a doctoral fellowship. We also thank Talha Nisar, Jonas Köhling, and Prof. Veit Wagner (all Jacobs University) for using a furnace, allowing heating under N2. We also acknowledge Lana Yassine for designing the TOC graphic. Figure 1 was generated using Diamond version 3.2 software (copyright, Crystal Impact GbR).

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