Acquisition of a Nano-Calorimetric System for Detailed Characterization of Next-Generation CWA Catalysts
Abstract
The acquisition of the nano-calorimeter system through this DURIP proposal will allow us to build one of its kind capability for very sensitive measurements of adsorption and reactions of different molecules of interest to the Army on catalytic surfaces. Specifically, the proposed system is designed for measuring adsorption and reaction enthalpies of small molecules (H2, O2, CO, HCHO, CH3OH) and CWA simulants on catalysts being developed in the Karim and Morris laboratories as part of ongoing awards (W911NF-16-1-0400 ÒSupported Single Atom Catalysts for Low Temperature OxidationÓ, W911NF-19-1-0308 ÒIdentifying Reactivity Descriptors of Single Atom CatalystsÓ and W911NF-15-2-0107 ÒAdvanced Filtration Materials: Uptake, Decomposition, and Catalysis for Agent-POM/MOF ChemistryÓ). The acquisition of the nano-calorimeter capability through this DURIP proposal will allow us to achieve key research goals of those awards. Additionally, the nano-calorimeter system will serve as an important capability for years to come and will have a broad and important impact beyond the current awarded projects. The novelty of the proposed system is in the integration of a very sensitive calorimeter, gas dosing system, and mass spectrometer to allow measurements not previously possible. Specifically, the system will allow measurements of low metal loading catalysts (as low as 0.005 metal wt%) due to the very high sensitivity of the calorimeter and ability to measure large sample quantity. Moreover, the system will be coupled with an online mass spectrometer to measure the uptake of the adsorbant and the products when reactions do proceed on the catalyst surface. The results from this work are expected to advance the basic science of heterogeneous catalysis by revealing unprecedented details on the interaction of molecules with single atom and subnanometer clusters to help design the next generation oxidation catalysts.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 09, 2020
- Source ID
- W911NF2010198
Entities
People
- Ayman M Karim
Organizations
- Army Contracting Command
- United States Army
- Virginia Tech