Shaun K Johnston
Shaun K Johnston
Thomas A Bryant
Jonathan Strong
Laura Lazzarini
Dr Alex Ibhadon A.O.Ibhadon@hull.ac.uk
Senior Lecturer
Dr Maria Grazia Francesconi M.G.Francesconi@hull.ac.uk
Senior Lecturer
Selective hydrogenation (semi-hydrogenation) reactions of alkynes rely on Pd-based catalysts to provide the correct pathway to favour formation of double bonds and avoid full hydrogenation to single bonds. Here, we present the preparation and characterisation of "Pd3In"/TiO2 nanocatalysts, which show improved activity and selectivity compared to pure Pd catalysts, towards the liquid phase semi-hydrogenation of 2-methyl-3-butyn-2-ol (MBY) to 2-methyl-3-buten-2-ol (MBE), a fundamental step in the preparation of pharmaceuticals, and other industrially produced substances, as well as a model reaction for the semi-hydrogenation of alkynes. For both the supported and unsupported "Pd3In" alloys (later redefined as Pd3-xIn1+x), we stabilised two new cubic polymorphs with a Pd-like structure, instead of the tetragonal structure as reported so far in the literature. The stabilisation of these new polymorphs was made possible by using a solution-based synthesis and, thanks to the use of different solvents, the reaction was 2 carried out at different temperatures and the Pd/In ratio could be tuned. The same synthetic approach was adapted to prepare two "Pd3In"/TiO2 catalysts by adding the TiO2 support to the reaction mixture, in a practical one-step, one-pot reaction. HREM and X-Ray maps show that the cubic crystal structure of "Pd3In" is maintained when prepared in the presence of the support, however, the support seems to influence the Pd/In ratio.
| Journal Article Type | Article |
| Publication Date | Jun 19, 2019 |
| Journal | ChemCatChem |
| Print ISSN | 1867-3880 |
| Electronic ISSN | 1867-3899 |
| Publisher | Wiley |
| Peer Reviewed | Peer Reviewed |
| Volume | 11 |
| Issue | 12 |
| Pages | 2909-2918 |
| Institution Citation | Johnston, S. K., Bryant, T. A., Strong, J., Lazzarini, L., Ibhadon, A. O., & Francesconi, M. G. (2019). Stabilization of Pd3−xIn1+x polymorphs with Pd-like crystal structure and their superior performance as catalysts for semi-hydrogenation of alkynes. ChemCatChem, 11(12), 2909-2918. https://doi.org/10.1002/cctc.201900391 |
| DOI | https://doi.org/10.1002/cctc.201900391 |
| Keywords | Semi-hydrogenation; Nanoalloys; Pd3in |
| Publisher URL | https://onlinelibrary.wiley.com/doi/10.1002/cctc.201900391 |
| Additional Information | This is the accepted manuscript of an article published in ChemCatChem, 2019. The version of record is available at the DOI link in this record. |
This file is under embargo until Apr 27, 2020 due to copyright reasons.
Contact M.G.Francesconi@hull.ac.uk to request a copy for personal use.
About Hull Repository
© 2018 Worktribe
This application uses the following open-source libraries:
Apache License Version 2.0 (http://www.apache.org/licenses/)
Apache License Version 2.0 (http://www.apache.org/licenses/)
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)