The effect of thermodynamic properties of zirconia-supported Fe3O4 on water-gas shift activity
By Baldychev, Ivan; Vohs, John M. & Gorte, Raymond J.
Published in Applied Catalysis A: General
NULL
2009
Abstract
The thermodynamics of the oxidation and reduction of a series of zirconia- and alumina-supported iron-oxide catalysts were measured using coulometric titration and then compared to their activity for the water-gas shift (WGS) reaction. For the supported iron oxide catalysts with weight loadings of 5–30 wt%, the Gibbs free energy for the phase transition between Fe2O3 and Fe3O4 decreased by factor of two compared to that for bulk, unsupported iron oxide. This difference in thermodynamic properties was also found to affect the WGS reaction rates, with the rates on the supported catalysts being an order of magnitude lower than that for bulk iron oxide. We propose that the differences in the thermodynamic properties of the supported and unsupported catalysts are due to lattice strain in the supported iron oxide resulting from interactions at the FeOx-support interface.
Microsoft is Ending Support for Windows 7
Microsoft will discontinue support for Windows 7 on January 14, 2020 which means Gamry will also be discontinuing support for Windows 7. If you are upgrading to Windows 10, like many companies and institutions, you need to be running Version 7 of our s oftware . Please note that only USB and Ethernet-based instruments can run in Version 7. Eligible users can download the latest version of our software through our online Client Portal .
If you haven't already registered your instrument, you can do so through the Client Portal .
Please email Technical Support if you have any questions regarding this transition. Please be sure to include your instrument model and serial number when contacting us.