Investigating Support Effects on Potassium-Promoted Mo2C Catalysts for the Reverse Water Gas Shift Reaction
Abstract
The reverse water gas shift reaction (RWGS) is an important first step in the thermochemical transformation of CO2 to fuels. Recent research efforts have investigated transition metal carbides due to their high activity and terrestrial abundance. In order to improve particle dispersion and mechanical stability, the catalysts are often deposited onto high surface area metal oxide supports. Understanding the influence the oxide support has on the observed catalytic activity is imperative for increased efficiency. Herein, we investigate the effect of the oxide support's (gamma-Al2O3,SiO2, ZrO2, CeO2, and MgO) reducibility and acidity on potassium promoted molybdenum carbide catalysts for the RWGS. Additionally, DFT computation was used to evaluate CO and CO2 adsorption energies at a model interface of Mo2C/MgO. It is demonstrated that non-reducible and acidic supports are the most active for the production of CO with K-Mo2C/Al2O3 showing the highest CO site time yield of 55.6 min-1.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 25, 2023
- Accession Number
- AD1205222
Entities
People
- Andrew R. Shabaev
- Cameron F Holder
- Heather Willauer
- James R. Morse
- Jeffrey W. Baldwin
- Patrick Barboun
Organizations
- United States Naval Research Laboratory