Low temperature water–gas shift: comparison of thoria and ceria catalysts

2004 ◽  
Vol 267 (1-2) ◽  
pp. 27-33 ◽  
Author(s):  
Gary Jacobs ◽  
Adam Crawford ◽  
Leann Williams ◽  
Patricia M Patterson ◽  
Burtron H Davis
Keyword(s):  
Low Temperature ◽  
Water Gas Shift ◽  
Ceria Catalysts ◽  
Water Gas ◽  
Temperature Water

Low temperature water-gas shift: kinetic isotope effect observed for decomposition of surface formates for Pt/ceria catalysts

2004 ◽  
Vol 269 (1-2) ◽  
pp. 63-73 ◽  
Author(s):  
Gary Jacobs ◽  
Patricia M. Patterson ◽  
Uschi M. Graham ◽  
Dennis E. Sparks ◽  
Burtron H. Davis
Keyword(s):  
Low Temperature ◽  
Isotope Effect ◽  
Kinetic Isotope Effect ◽  
Water Gas Shift ◽  
Kinetic Isotope ◽  
Ceria Catalysts ◽  
Water Gas ◽  
Temperature Water

Gold–ceria catalysts for low-temperature water-gas shift reaction

2003 ◽  
Vol 93 (1) ◽  
pp. 41-53 ◽  
Author(s):  
Qi Fu ◽  
Svetlana Kudriavtseva ◽  
Howard Saltsburg ◽  
Maria Flytzani-Stephanopoulos
Keyword(s):  
Low Temperature ◽  
Water Gas Shift ◽  
Water Gas Shift Reaction ◽  
Ceria Catalysts ◽  
Shift Reaction ◽  
Water Gas ◽  
Temperature Water

A comparative study of nanosized IB/ceria catalysts for low-temperature water-gas shift reaction

2006 ◽  
Vol 298 ◽  
pp. 127-143 ◽  
Author(s):  
T TABAKOVA ◽  
F BOCCUZZI ◽  
M MANZOLI ◽  
J SOBCZAK ◽  
V IDAKIEV ◽  
...  
Keyword(s):  
Low Temperature ◽  
Comparative Study ◽  
Water Gas Shift ◽  
Water Gas Shift Reaction ◽  
Ceria Catalysts ◽  
Shift Reaction ◽  
Water Gas ◽  
Temperature Water

scholarly journals Comparative study for low temperature water-gas shift reaction on Pt/ceria catalysts: Role of different ceria supports

2015 ◽  
Vol 507 ◽  
pp. 1-13 ◽  
Author(s):  
Rishabh Jain ◽  
Altug S. Poyraz ◽  
David P. Gamliel ◽  
Julia Valla ◽  
Steven L. Suib ◽  
...  
Keyword(s):  
Low Temperature ◽  
Comparative Study ◽  
Water Gas Shift ◽  
Water Gas Shift Reaction ◽  
Ceria Catalysts ◽  
Shift Reaction ◽  
Water Gas ◽  
Temperature Water

Low temperature water gas shift: Type and loading of metal impacts forward decomposition of pseudo-stabilized formate over metal/ceria catalysts

2005 ◽  
Vol 106 (1-4) ◽  
pp. 259-264 ◽  
Author(s):  
Gary Jacobs ◽  
Sandrine Ricote ◽  
Uschi M. Graham ◽  
Patricia M. Patterson ◽  
Burtron H. Davis
Keyword(s):  
Low Temperature ◽  
Water Gas Shift ◽  
Shift Type ◽  
Ceria Catalysts ◽  
Water Gas ◽  
Temperature Water

Low Temperature Water–Gas Shift: Alkali Doping to Facilitate Formate C–H Bond Cleaving over Pt/Ceria Catalysts—An Optimization Problem

2007 ◽  
Vol 120 (3-4) ◽  
pp. 166-178 ◽  
Author(s):  
Harold N. Evin ◽  
Gary Jacobs ◽  
Javier Ruiz-Martinez ◽  
Gerald A. Thomas ◽  
Burtron H. Davis
Keyword(s):  
Low Temperature ◽  
Optimization Problem ◽  
Water Gas Shift ◽  
Alkali Doping ◽  
Ceria Catalysts ◽  
Water Gas ◽  
Temperature Water

scholarly journals Low Temperature Water-Gas Shift: Enhancing Stability through Optimizing Rb Loading on Pt/ZrO2

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 210
Author(s):  
Caleb Daniel Watson ◽  
Michela Martinelli ◽  
Donald Charles Cronauer ◽  
A. Jeremy Kropf ◽  
Gary Jacobs
Keyword(s):  
Low Temperature ◽  
Hydrogen Transfer ◽  
Water Gas Shift ◽  
Significant Shift ◽  
Catalyst Activation ◽  
X Ray ◽  
Temperature Programmed ◽  
Water Gas ◽  
X Ray Absorption ◽  
Temperature Water

Recent studies have shown that appropriate levels of alkali promotion can significantly improve the rate of low-temperature water gas shift (LT-WGS) on a range of catalysts. At sufficient loadings, the alkali metal can weaken the formate C–H bond and promote formate dehydrogenation, which is the proposed rate determining step in the formate associative mechanism. In a continuation of these studies, the effect of Rb promotion on Pt/ZrO2 is examined herein. Pt/ZrO2 catalysts were prepared with several different Rb loadings and characterized using temperature programmed reduction mass spectrometry (TPR-MS), temperature programmed desorption (TPD), diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), an X-ray absorption near edge spectroscopy (XANES) difference procedure, extended X-ray absorption fine structure spectroscopy (EXAFS) fitting, TPR-EXAFS/XANES, and reactor testing. At loadings of 2.79% Rb or higher, a significant shift was seen in the formate ν(CH) band. The results showed that a Rb loading of 4.65%, significantly improves the rate of formate decomposition in the presence of steam via weakening the formate C–H bond. However, excessive rubidium loading led to the increase in stability of a second intermediate, carbonate and inhibited hydrogen transfer reactions on Pt through surface blocking and accelerated agglomeration during catalyst activation. Optimal catalytic performance was achieved with loadings in the range of 0.55–0.93% Rb, where the catalyst maintained high activity and exhibited higher stability in comparison with the unpromoted catalyst.

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