Interaction between Ionic Liquids and a Pt(111) Surface Probed by Coadsorbed CO as a Test Molecule

Eschenbacher R, Schuschke C, Bühlmeyer H, Taccardi N, Wasserscheid P, Bauer T, Xu T, Libuda J (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Journal of Physical Chemistry Letters American Chemical Society

Pages Range: 10079-10085

Abstract

We used temperature-programmed infrared reflection absorption spectroscopy (TP-IRAS) to study the desorption behavior of CO on Pt(111) coadsorbed with four kinds of ionic liquids (ILs), namely 1-butyl-1-methyl-pyrrolidinium-bis(trifluoromethylsulfonyl)imide ([C4C1Pyr][NTf2]), 1-ethyl-3-methyl-imidazolium-bis(trifluoromethylsulfonyl)imide ([C2C1Im][NTf2]), 1-butyl-1-methyl-pyrrolidinium-trifluoro-methanesulfonate ([C4C1Pyr][OTf]), and 1-butyl-1-methyl-pyrrolidinium-hexafluorophosphate ([C4C1Pyr][PF6]). We found that CO desorbs earlier from a Pt(111) surface with coadsorbed ILs than without. In addition, the CO desorption temperature varies between different types of coadsorbed ILs, which follows the order: [C4C1Pyr][PF6] (365 K) > [C4C1Pyr][NTf2] (362 K) > [C2C1Im][NTf2] (352 K) > [C4C1Pyr][OTf] (348 K). We ascribe the difference in CO desorption temperature to the different interaction strength between ILs and the Pt(111) surface. A stronger IL-Pt(111) interaction leads to a lower CO desorption temperature. We suggest that TP-IRAS experiments of CO coadsorbed with ILs can be a useful method to aid the characterization of the interaction strength between ILs and metal surfaces such as Pt(111).

Authors with CRIS profile

Roman Eschenbacher Lehrstuhl für Katalytische Grenzflächenforschung Christian Schuschke Lehrstuhl für Katalytische Grenzflächenforschung Hanna Bühlmeyer Lehrstuhl für Katalytische Grenzflächenforschung Nicola Taccardi Lehrstuhl für Chemische Reaktionstechnik (CRT) Peter Wasserscheid Lehrstuhl für Chemische Reaktionstechnik (CRT) Tanja Retzer Lehrstuhl für Katalytische Grenzflächenforschung Tao Xu Lehrstuhl für Katalytische Grenzflächenforschung Jörg Libuda Lehrstuhl für Katalytische Grenzflächenforschung

How to cite

APA:

Eschenbacher, R., Schuschke, C., Bühlmeyer, H., Taccardi, N., Wasserscheid, P., Bauer, T.,... Libuda, J. (2021). Interaction between Ionic Liquids and a Pt(111) Surface Probed by Coadsorbed CO as a Test Molecule. Journal of Physical Chemistry Letters, 10079-10085. https://doi.org/10.1021/acs.jpclett.1c02983

MLA:

Eschenbacher, Roman, et al. "Interaction between Ionic Liquids and a Pt(111) Surface Probed by Coadsorbed CO as a Test Molecule." Journal of Physical Chemistry Letters (2021): 10079-10085.

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