Improving the Performance of Supported Ionic Liquid Phase Catalysts for the Ultra-Low-Temperature Water Gas Shift Reaction Using Organic Salt Additives

Wolf P, Wick C, Mehler J, Blaumeiser D, Schötz S, Bauer T, Libuda J, Smith D, Smith AS, Haumann M (2022)

Publication Type: Journal article

Publication year: 2022

Journal

ACS Catalysis American Chemical Society

Book Volume: 12

Pages Range: 5661-5672

Journal Issue: 9

DOI: 10.1021/acscatal.1c05979

Abstract

The water gas shift reaction (WGSR) is catalyzed by supported ionic liquid phase (SILP) systems containing homogeneous Ru complexes dissolved in ionic liquids (ILs). These systems work at very low temperatures, that is, between 120 and 160 °C, as compared to >200 °C in the conventional process. To improve the performance of this ultra-low-temperature catalysis, we investigated the influence of various additives on the catalytic activity of these SILP systems. In particular, the application of methylene blue (MB) as an additive doubled the activity. Infrared spectroscopy measurements combined with density functional theory (DFT) calculations excluded a coordinative interaction of MB with the Ru complex. In contrast, state-of-the-art theoretical calculations elucidated the catalytic effect of the additives by non-covalent interactions. In particular, the additives can significantly lower the barrier of the rate-determining step of the reaction mechanism via formation of hydrogen bonds. The theoretical predictions, thereby, showed excellent agreement with the increase of experimental activity upon variation of the hydrogen bonding moieties in the additives investigated.

Authors with CRIS profile

Patrick Wolf Lehrstuhl für Chemische Reaktionstechnik Christian Wick Computer-Chemie-Centrum Julian Mehler Lehrstuhl für Chemische Reaktionstechnik Dominik Blaumeiser Lehrstuhl für Katalytische Grenzflächenforschung Simon Schötz Lehrstuhl für Katalytische Grenzflächenforschung Tanja Retzer Lehrstuhl für Katalytische Grenzflächenforschung Jörg Libuda Lehrstuhl für Katalytische Grenzflächenforschung Ana-Suncana Smith Physics Underlying Life Science Marco Haumann Lehrstuhl für Chemische Reaktionstechnik

Additional Organisation(s)

Graduiertenkolleg 2423 Skalenübergreifende Bruchvorgänge: Integration von Mechanik, Materialwissenschaften, Mathematik, Chemie und Physik

Involved external institutions

Rudjer Boskovic Institute (RBI) / Institut Ruđer Bošković (IRB) HR Croatia (HR)

How to cite

APA:

Wolf, P., Wick, C., Mehler, J., Blaumeiser, D., Schötz, S., Bauer, T.,... Haumann, M. (2022). Improving the Performance of Supported Ionic Liquid Phase Catalysts for the Ultra-Low-Temperature Water Gas Shift Reaction Using Organic Salt Additives. ACS Catalysis, 12(9), 5661-5672. https://doi.org/10.1021/acscatal.1c05979

MLA:

Wolf, Patrick, et al. "Improving the Performance of Supported Ionic Liquid Phase Catalysts for the Ultra-Low-Temperature Water Gas Shift Reaction Using Organic Salt Additives." ACS Catalysis 12.9 (2022): 5661-5672.

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