Particle shape optimization by changing from an isotropic to an anisotropic nanostructure: Preparation of highly active and stable supported Pt catalysts in microemulsions

Riny Y. Parapat, Muliany Wijaya, Michael Schwarze, Sören Selve, Marc Willinger, Reinhard Schomäcker

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

We recently introduced a new method to synthesize an active and stable Pt catalyst, namely thermo-destabilization of microemulsions (see R. Y. Parapat, V. Parwoto, M. Schwarze, B. Zhang, D. S. Su and R. Schomäcker, J. Mater. Chem., 2012, 22 (23), 11605-11614). We are able to produce Pt nanocrystals with a small size (2.5 nm) of an isotropic structure i.e. truncated octahedral and deposit them well on support materials. Although we have obtained good results, the performance of the catalyst still needed to be improved and optimized. We followed the strategy to retain the small size but change the shape to an anisotropic structure of Pt nanocrystals which produces more active sites by means of a weaker reducing agent. We found that our catalysts are more active than those we reported before and even show the potential to be applied in a challenging reaction such as hydrogenation of levulinic acid.

Original languageEnglish
Pages (from-to)796-805
Number of pages10
JournalNanoscale
Volume5
Issue number2
DOIs
StatePublished - 21 Jan 2013
Externally publishedYes

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