Issue 1, 2020

Cu carbonyls enhance the performance of Ru-based SILP water–gas shift catalysts: a combined in situ DRIFTS and DFT study

Abstract

Ru-based supported ionic liquid phase (SILP) catalysts efficiently promote the water–gas shift reaction (WGSR). The addition of CuCl further improves the performance. This is attributed to the formation of labile Cu carbonyl species, which act as CO shuttles in the ionic liquid (IL) phase. We apply in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) to monitor the formation of these Cu carbonyls in an imidazolium-based SILP system. To aid the identification of the relevant Cu carbonyls, we perform density functional theory (DFT) calculations. In the present study, we investigate [Ru(CO)3Cl2]2/CuCl/[C4C1C1Im]Cl/Al2O3 and CuCl/[C4C1C1Im]Cl/Al2O3 with various CuCl : IL ratios. The relevant Cu carbonyls are identified as neutral CuCl monomers and dimers, as well as monoanionic monomers and dimers. Moreover, we demonstrate that the ratio of the individual Cu carbonyl species depends on the CuCl : IL ratio.

Graphical abstract: Cu carbonyls enhance the performance of Ru-based SILP water–gas shift catalysts: a combined in situ DRIFTS and DFT study

Supplementary files

Article information

Article type
Paper
Submitted
12 Sep 2019
Accepted
23 Nov 2019
First published
27 Nov 2019

Catal. Sci. Technol., 2020,10, 252-262

Cu carbonyls enhance the performance of Ru-based SILP water–gas shift catalysts: a combined in situ DRIFTS and DFT study

D. Blaumeiser, R. Stepić, P. Wolf, C. R. Wick, M. Haumann, P. Wasserscheid, D. M. Smith, A. Smith, T. Bauer and J. Libuda, Catal. Sci. Technol., 2020, 10, 252 DOI: 10.1039/C9CY01852B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements