Catalyst Structure-Performance Relationship Identified by High-Throughput Operando Method: New Insight for Silica-Supported Vanadium Oxide for Methanol Oxidation
A prototype high throughput operando reactor, that integrates FT-IR imaging for rapid reaction product analysis and parallel Raman imaging for catalyst characterization, has been designed to accelerate catalyst discovery and, concurrently, fundamental research toward reliable correlations between catalyst active sites and catalyst performance for at-line real catalytic conditions. This reactor, consisting of six parallel reaction channels, is demonstrated for methanol oxidation using silica supported vanadium oxide catalysts at various reaction conditions. The results of semi-quantitative analysis of a large array of operando Raman scattering bands, specifically for C-H bonds in Si-OCH3 and V-OCH3 surface intermediates, obtained simultaneously on multiple catalyst surfaces with a time resolution of 60s for each set at different temperatures, reveal for the first time methanol activation at surface vanadium oxide cluster edge on silica support at lower reaction temperatures, <175°C. This activation phenomenon is not observed at a higher reaction temperature, 225°C.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 974926
- Report Number(s):
- PNNL-SA-58799; 25401; TRN: US201007%%885
- Journal Information:
- Topics in Catalysis, 53(1-2):40-48, Vol. 53, Issue 1-2
- Country of Publication:
- United States
- Language:
- English
Similar Records
High Throughput Operando Studies using Fourier Transform Infrared Imaging and Raman Spectroscopy
Development of Vanadium-Phosphate Catalysts for Methanol Production by Selective Oxidation of Methane.