Journal
CHEMCATCHEM
Volume 8, Issue 8, Pages 1564-1574Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201600021
Keywords
hydrogen peroxide; nanoparticles; palladium; reduction; supported catalysts
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Funding
- Abo Akademi University (AA)
- Academy of Finland
- Kempe Foundations (Kempe Stiftelserna)
- Knut and Alice Wallenberg Foundation
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Different metal precursors and reducing agents were applied in the preparation of 1wt% Pd catalysts supported on commercial ion-exchange resin (Lewatit K2621) and used in the direct synthesis of H2O2. The catalysts were characterized by using TEM and their performance was evaluated in the direct synthesis of H2O2 (in a batch and semi-batch reactor) to investigate the relationship between the catalyst preparation methods, morphology, and catalytic performance. As expected, both the choice of the Pd precursor and the reduction conditions had a strong influence on the size and size distribution of the resulting supported nanostructured metal nanoparticles and, consequently, on the catalytic performance. The best combination of metal precursor and reduction agent was [Pd(NH3)(4)]SO4 reduced with hydrogen. This catalyst had the largest average size of the Pd nanoparticles and the broadest size distribution.
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