Mechanistic study of catalytic COhydrogenation in a plasma by operando DRIFT spectroscopy

A. Parastaev, N. Kosinov, E. J.M. Hensen (Corresponding author)

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Abstract

Plasma-enhanced heterogeneous catalysis offers a promising alternative to thermal catalysis for many industrially relevant processes. There is only limited mechanistic understanding about the relation between the interactions of highly energetic electrons and excited molecules with heterogeneous catalysts in a plasma and their catalytic performance. Herein, a novel operando infrared spectroscopy cell is presented allowing the investigation of surface intermediates upon exposure of a catalyst to plasma. The polyether ether ketone cell enclosure embedding a quartz reactor is operated at atmospheric pressure and can be heated to 250 °C. A case study involved the characterization of surface intermediates during CO2 hydrogenation on a Co/CeZrO4 catalyst. The temperature was monitored using online UV-Vis spectroscopy. This combined approach offers new experimental insights into plasma-catalyst synergy. The most important one is the demonstration of CO2 methanation at the catalyst surface at room temperature in a plasma.

Original languageEnglish
Article number264004
Number of pages9
JournalJournal of Physics D: Applied Physics
Volume54
Issue number26
DOIs
Publication statusPublished - 23 Apr 2021

Bibliographical note

Publisher Copyright:
© 2021 The Author(s). Published by IOP Publishing Ltd.

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

Keywords

  • ceria-zirconia
  • COhydrogenation
  • cobalt
  • operando DRIFTS
  • plasma catalysis

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