Journal
CATALYSIS SCIENCE & TECHNOLOGY
Volume 6, Issue 3, Pages 722-730Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5cy01175b
Keywords
-
Categories
Funding
- EPSRC [EP/K014706/1, EP/K014668/1, EP/K014854/1, EP/K014714/1, EP/I019693/1]
- Diamond Light Source and the Cardiff Catalysis Institute (CCI)
- Engineering and Physical Sciences Research Council [EP/I019693/1, EP/K014854/1, EP/K014668/1, EP/K014714/1, EP/K014706/1, EP/K005030/1] Funding Source: researchfish
- EPSRC [EP/K005030/1] Funding Source: UKRI
Ask authors/readers for more resources
Multicomponent oxide shell@core catalysts have been prepared, affording overlayers of MoOx on Fe2O3. This design approach allows bulk characterization techniques, such as X-ray Absorption Fine Structure (XAFS), to provide surface sensitive information. Coupling this approach with in situ methodologies provides insights during crucial catalytic processes. Calcination studies were followed by a combination of XAFS and Raman, and demonstrate that amorphous multi-layers of MoOx are first converted to MoO3 before formation of Fe-2(MoO4)(3). However, a single overlayer of O-h Mo units remains at the surface at all times. In situ catalysis studies during formaldehyde production identified that Mo6+ was present throughout, confirming that gas phase oxygen transfer to molybdenum is rapid under reaction conditions. Reduction studies in the presence of MeOH resulted in the formation of reduced Mo-Mo clusters with a bonding distance of 2.6 angstrom. It is proposed that the presence of the clusters indicates that the selective conversion of MeOH to formaldehyde requires multiple Mo sites.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available