Development of an Ir/TiO2 catalytic coating for plasma assisted hydrogenation of CO2 to CH4

Joseph W. Gregory, Nima Pourali (Corresponding author), Yuyan Gong, Richard I. Walton, Volker Hessel, Evgeny V. Rebrov (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)
20 Downloads (Pure)

Abstract

The hydrogenation of CO2 to methane over a 20 wt% Ir/TiO2 catalytic coating has been investigated in a tubular dielectric barrier discharge (DBD) reactor. The 1.2 µm Ir/TiO2 coating was deposited onto the inner wall of a quartz tube by a combustion-evaporation method from a mixture containing a Ti precursor and a colloidal suspension of Ir nanoparticles (2 nm). The catalyst was characterised by XRD, SEM, TEM/EDS and CO chemisorption. The Ir(0) state in the as-synthesised film was confirmed by XPS. The CH4 conversion increased by 1.5 times, as compared to an empty tube. A maximum CO2 conversion rate of 2.1 μmol s−1 was achieved at a fuel production efficiency of 3.5%. Surface reactions onto the catalyst surface are responsible for enhancement of reaction rate. The results presented in this work open up new possibilities in plasma-catalysis, whereby efficient reactions can be carried out over small volumes of catalyst.

Original languageEnglish
Article number119639
Number of pages10
JournalApplied Catalysis. A, General
Volume675
DOIs
Publication statusPublished - 5 Apr 2024

Keywords

  • CO hydrogenation
  • Combustion-evaporation
  • Ir/TiO
  • Surface-confined plasma

Fingerprint

Dive into the research topics of 'Development of an Ir/TiO2 catalytic coating for plasma assisted hydrogenation of CO2 to CH4'. Together they form a unique fingerprint.

Cite this