scholarly journals Understanding and Controlling Metal-Support Interactions in Nanocrystalline Bimetallic Catalysts

2005 ◽  
Author(s):  
James M. Howe ◽  
Robert J. Davis
Keyword(s):  
Bimetallic Catalysts ◽  
Metal Support ◽  
Metal Support Interactions

Au-Rh and Au-Pd Nanoalloys supported on well-defined Rutile Titania Nanorods for Aromatics Hydrogenation Applications

2014 ◽  
Vol 1641 ◽  
Author(s):  
Zere Konuspayeva ◽  
Gilles Berhault ◽  
Pavel Afanasiev ◽  
Thanh-Son Nguyen ◽  
Ali Auyezov ◽  
...  
Keyword(s):  
Bimetallic Catalysts ◽  
Bimetallic Nanoparticles ◽  
Alloy Structure ◽  
Catalytic Systems ◽  
Impregnation Technique ◽  
Vis Spectroscopy ◽  
Metal Support ◽  
Rutile Titania ◽  
Acidic Conditions ◽  
Metal Support Interactions

ABSTRACTTiO2-supported bimetallic Au-Rh and Au-Pd nanocrystals were synthesized using both impregnation and colloidal approaches employing HAuCl4 and RhCl3 as precursors. The as-obtained bimetallic catalysts were then supported onto TiO2 rutile nanorods in order to provide catalytic systems with well-defined metal-support interactions for HRTEM characterization. The results revealed the superiority of the colloidal approach over the impregnation technique to obtain bimetallic nanoparticles (4 nm in size) with tunable composition. However, for Au-Rh/TiO2, optimization of the procedure of the sol immobilization onto the TiO2 support was required to avoid possible Rh re-dissolution. Preparation of Au-Pd/TiO2 followed the same procedure but with more acidic conditions necessary to perform immobilization on the support. UV-vis spectroscopy and XRD results suggest formation of a Rh-rich shell over an Au core center for Au-Rh NPs, while Au-Pd NPs present a pure alloy structure. Au-Rh/TiO2 was used for performing the high-pressure hydroconversion of tetralin in the presence or not of H2S. The results indicate a strong thioresistance induced by the addition of Au to Rh.

Growth kinetic control over MgFe2O4 to tune Fe occupancy and metal–support interactions for optimum catalytic performance

CrystEngComm ◽  
2021 ◽  
Vol 23 (13) ◽  
pp. 2538-2546
Author(s):  
Min Yang ◽  
Guangshe Li ◽  
Huixia Li ◽  
Junfang Ding ◽  
Yan Wang ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Growth Kinetic ◽  
Catalytic Performance ◽  
Growth Behavior ◽  
Kinetic Control ◽  
Size Dependent ◽  
Metal Support ◽  
Support Size ◽  
Metal Support Interactions ◽  
First Time

For the first time, the growth behavior with size-dependent Fe occupancies at different sites of MgFe2O4 was examined. Hybrid catalysts of Pt/MgFe2O4 with a support size of 20.6 nm exhibited an optimal performance of CO oxidation.

Metal–Support Interactions in Fe/ZrO2Catalysts for Hydrogenation of CO

1997 ◽  
Vol 167 (2) ◽  
pp. 573-575 ◽  
Author(s):  
Kaidong Chen ◽  
Yining Fan ◽  
Qijie Yan
Keyword(s):  
Metal Support ◽  
Metal Support Interactions ◽  
Hydrogenation Of Co
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