Tantalum oxide-supported metal oxide (Re2O7, CrO3, MoO3, WO3, V2O5, and Nb2O5) catalysts: synthesis, Raman characterization and chemically probed by methanol oxidation

2003 ◽  
Vol 217 (2) ◽  
pp. 468-477 ◽  
Author(s):  
Yongsheng Chen ◽  
Israel E. Wachs
Keyword(s):  
Metal Oxide ◽  
Methanol Oxidation ◽  
Tantalum Oxide ◽  
Supported Metal Oxide ◽  
Raman Characterization ◽  
Supported Metal

The dynamic states of silica-supported metal oxide catalysts during methanol oxidation

1996 ◽  
Vol 28 (4) ◽  
pp. 335-350 ◽  
Author(s):  
Jih-Mirn Jehng ◽  
Hungchun Hu ◽  
Xingtao Gao ◽  
Israel E. Wachs
Keyword(s):  
Metal Oxide ◽  
Methanol Oxidation ◽  
Oxide Catalysts ◽  
Metal Oxide Catalysts ◽  
Supported Metal Oxide ◽  
Supported Metal ◽  
Dynamic States

Effect of Nanosized Gold Particle Addition to Supported Metal Oxide Catalyst in Methanol Oxidation

2006 ◽  
Vol 6 (11) ◽  
pp. 3589-3593
Author(s):  
Ki-Joong Kim ◽  
Young-Jae You ◽  
Min-Chul Chung ◽  
Chan-Soon Kang ◽  
Kyong-Hwan Chung ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Oxide ◽  
Methanol Oxidation ◽  
Catalyst Activity ◽  
Chemical Species ◽  
Impregnation Method ◽  
Gold Particles ◽  
Transmission Electron ◽  
Supported Metal Oxide ◽  
Supported Metal

Gold has rarely been utilized as a catalytic component because of its poor affinity to chemical species. It is however known that nanosized gold particles promote the dissociation of oxygen or hydrogen. In this study, alumina-supported metal oxide catalysts were prepared by impregnation method and applied to methanol oxidation. The dispersion form and size of the gold particles were observed by transmission electron microscopy (TEM). In the results, the maximum catalytic activity was obtained over the ZnO/Al2O3 catalyst, and the optimum loading was 4 wt%. Furthermore, nanosized gold particles at various loadings were added to ZnO/Al2O3 catalyst by deposition method. The gold particles on Au/ZnO/Al2O3 catalyst were well dispersed and the catalyst activity was remarkably increased compared to ZnO/Al2O3 catalyst. The role of gold particles in the increased catalytic activity is discussed and a possible mechanism is presented.

Effect of Nanosized Gold Particle Addition to Supported Metal Oxide Catalyst in Methanol Oxidation

2006 ◽  
Vol 6 (11) ◽  
pp. 3589-3593 ◽  
Author(s):  
Ki-Joong Kim ◽  
Young-Jae You ◽  
Min-Chul Chung ◽  
Chan-Soon Kang ◽  
Kyong-Hwan Chung ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Methanol Oxidation ◽  
Gold Particle ◽  
Oxide Catalyst ◽  
Metal Oxide Catalyst ◽  
Supported Metal Oxide ◽  
Particle Addition ◽  
Supported Metal
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