Operando Ru and Ti K‐Edge X‐Ray Absorption Study of the Low‐Temperature Sabatier Reaction on Ru/TiO2 Catalysts
Joachim Bansmann, Shilong Chen, Ali M. Abdel‐Mageed, R. Jürgen Behm
TL;DR
This study uses advanced X-ray techniques to observe how a high-temperature treatment affects the structure and performance of a catalyst used in a key chemical reaction.
Contribution
The study reveals dynamic structural and chemical changes in Ru/TiO2 catalysts during the Sabatier reaction using operando X-ray absorption spectroscopy.
Findings
Reduction of Ru nanoparticles occurs faster in CO-containing gas mixtures compared to CO-free ones.
XAS at the Ti K-edge provides insights into oxygen vacancies and the oxidation state of the support.
Catalyst activation times correlate with the observed structural changes under reaction conditions.
Abstract
Stimulated by recent findings of a beneficial effect of a high‐temperature treatment on the activity and selectivity of highly active and selective Ru/TiO2 catalysts in the CO x methanation, a detailed study of the dynamic changes in the chemical and structural properties is performed, induced by this treatment and their correlation with the changes in the catalytic performance of the catalyst. These changes are characterized by time‐resolved operando X‐ray absorption spectroscopy at the Ru and Ti K‐edges, together with structural characterization by high‐resolution transmission electron microscopy. The observation of differently long times required for the reduction of the oxidic Ru nanoparticles in CO‐free CO2/H2 gas mixtures (1000 min) and in trace amounts of CO containing CO/CO2/H2 gas mixtures (100 min) under reaction conditions (190 °C, atmospheric pressure) correlates very well…
Genes, proteins, chemicals, diseases, species, mutations and cell lines named across the full text — each resolved to its canonical identifier and authoritative record.
Click any figure to enlarge with its caption.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsCatalysts for Methane Reforming · Catalytic Processes in Materials Science · Catalysis and Oxidation Reactions