Ultrasound- and microwave-assisted preparation of lead-free palladium catalysts: effects on the kinetics of diphenylacetylene semi-hydrogenation

Wu, Zhilin; Cherkasov, Nikolay; Cravotto, Giancarlo; Borretto, Emily; Ibhadon, Alex O.; Medlock, Jonathan; Bonrath, Werner

Abstract

The effect of environmentally benign enabling technologies such as ultrasound and microwaves on the preparation of the lead-free Pd catalyst has been studied. A one-pot method of the catalyst preparation using ultrasound-assisted dispersion of palladium acetate in the presence of the surfactant/capping agent and boehmite support produced the catalyst containing Pd nanoparticles and reduced the number of pores larger than 4 nm in the boehmite support. This catalyst demonstrated higher activity and selectivity. The comparison of kinetic parameters for diphenylacetylene hydrogenation showed that the catalyst obtained by using the one-pot method was seven times as active as a commercial Lindlar catalyst and selectivity towards Z-stilbene was high. Our work also illustrated that highly selective Pd/boehmite catalysts can be prepared through ultrasound-assisted dispersion and microwave-assisted reduction in water under hydrogen pressure without any surfactant.

Citation

Wu, Z., Cherkasov, N., Cravotto, G., Borretto, E., Ibhadon, A. O., Medlock, J., & Bonrath, W. (2015). Ultrasound- and microwave-assisted preparation of lead-free palladium catalysts: effects on the kinetics of diphenylacetylene semi-hydrogenation. ChemCatChem, 7(6), 952-959. https://doi.org/10.1002/cctc.201402999

• Journal Article Type: Article
• Acceptance Date: Dec 1, 2014
• Online Publication Date: Feb 16, 2015
• Publication Date: 2015-03
• Deposit Date: Apr 4, 2016
• Publicly Available Date: Apr 4, 2016
• Journal: ChemCatChem
• Print ISSN: 1867-3880
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 7
• Issue: 6
• Pages: 952-959
• DOI: https://doi.org/10.1002/cctc.201402999
• Keywords: Semi-hydrogenation, Diphenylacetylene, Lead-free Pd catalyst, Lindlar catalyst, Ultrasound, Microwaves
• Public URL: https://hull-repository.worktribe.com/output/434890
• Publisher URL: http://onlinelibrary.wiley.com/doi/10.1002/cctc.201402999/abstract
• Additional Information: This is the accepted version of the following article: Wu, Z., Cherkasov, N., Cravotto, G., Borretto, E., Ibhadon, A. O., Medlock, J. and Bonrath, W. (2015), Ultrasound- and Microwave-Assisted Preparation of Lead-Free Palladium Catalysts: Effects on the Kinetics of Diphenylacetylene Semi-Hydrogenation. ChemCatChem, 7: 952–959. doi:10.1002/cctc.201402999, which has been published in final form at http://dx.doi.org/10.1002/cctc.201402999. This article may be used for non-commercial purposes in accordance with the Wiley Self-Archiving Policy.
• Contract Date: Apr 4, 2016