scholarly journals Hydrodechlorination over Zeolite Supported Catalysts—Clarification of Reaction Mechanism—

2006 ◽  
Vol 49 (3) ◽  
pp. 105-113 ◽  
Author(s):  
István Hannus ◽  
János Halász
Keyword(s):  
Reaction Mechanism ◽  
Supported Catalysts

Hydrodeoxygenation of Phenol over Zirconia-Supported Catalysts: The Effect of Metal Type on Reaction Mechanism and Catalyst Deactivation

ChemCatChem ◽  
2017 ◽  
Vol 9 (14) ◽  
pp. 2850-2863 ◽  
Author(s):  
Camila A. Teles ◽  
Raimundo C. Rabelo-Neto ◽  
Gary Jacobs ◽  
Burtron H. Davis ◽  
Daniel E. Resasco ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Catalyst Deactivation ◽  
Supported Catalysts ◽  
Metal Type

scholarly journals New insights into the electrochemical hydrogen oxidation and evolution reaction mechanism

2014 ◽  
Vol 7 (7) ◽  
pp. 2255-2260 ◽  
Author(s):  
J. Durst ◽  
A. Siebel ◽  
C. Simon ◽  
F. Hasché ◽  
J. Herranz ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Hydrogen Oxidation ◽  
Supported Catalysts ◽  
Effect Of Ph ◽  
First Time

The effect of pH on the hydrogen oxidation and evolution reaction (HOR/HER) rates is addressed for the first time for the three most active monometallic surfaces: Pt, Ir, and Pd carbon-supported catalysts.

Coherent electron nanodiffraction from clean silver nano particles in a UHV STEM

1993 ◽  
Vol 51 ◽  
pp. 1058-1059
Author(s):  
J. Liu ◽  
M. Pan ◽  
G. E. Spinnler
Keyword(s):  
Supported Catalysts ◽  
Imaging Techniques ◽  
Nano Particles ◽  
Metal Particles ◽  
Shape Structure ◽  
Dynamical Simulations ◽  
Small Metal Particles ◽  
Extract Information

Small metal particles have peculiar chemical and physical properties as compared to bulk materials. They are especially important in catalysis since metal particles are common constituents of supported catalysts. The structural characterization of small particles is of primary importance for the understanding of structure-catalytic activity relationships. The shape and size of metal particles larger than approximately 5 nm in diameter can be determined by several imaging techniques. It is difficult, however, to deduce the shape of smaller metal particles. Coherent electron nanodiffraction (CEND) patterns from nano particles contain information about the particle size, shape, structure and defects etc. As part of an on-going program of STEM characterization of supported catalysts we report some preliminary results of CEND study of Ag nano particles, deposited in situ in a UHV STEM instrument, and compare the experimental results with full dynamical simulations in order to extract information about the shape of Ag nano particles.

Elemental Distribution in Pt-Re:Al2O3 Naphtha Reforming Catalysts

1980 ◽  
Vol 38 ◽  
pp. 200-201
Author(s):  
R. L. Freed ◽  
M. J. Kelley
Keyword(s):  
Bimetallic Catalyst ◽  
Supported Catalysts ◽  
Coke Formation ◽  
Materials Characterization ◽  
Metal Catalyst ◽  
Elemental Distribution ◽  
Exact Nature ◽  
Naphtha Reforming ◽  
Reforming Catalysts ◽  
Commercial Introduction

The commercial introduction of Pt-Re supported catalysts to replace Pt alone on Al2O3 has brought improvements to naphtha reforming. The bimetallic catalyst can be operated continuously under conditions which lead to deactivation of the single metal catalyst by coke formation. Much disagreement still exists as to the exact nature of the bimetallic catalyst at a microscopic level and how it functions in the process so successfully. The overall purpose of this study was to develop the materials characterization tools necessary to study supported catalysts. Specifically with the Pt-Re:Al2O3 catalyst, we sought to elucidate the elemental distribution on the catalyst.

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