Unusual Non-Bulk Properties in Nanoscale Materials:  Thermal Metal−Metal Bond Contraction of γ-Alumina-Supported Pt Catalysts

2006 ◽  
Vol 128 (37) ◽  
pp. 12068-12069 ◽  
Author(s):  
Joo H. Kang ◽  
Laurent D. Menard ◽  
Ralph G. Nuzzo ◽  
Anatoly I. Frenkel
Keyword(s):  
Nanoscale Materials ◽  
Pt Catalysts ◽  
Bulk Properties ◽  
Metal Bond ◽  
Supported Pt Catalysts ◽  
Metal Metal

scholarly journals In situ, operando studies on the size and structure of supported Pt catalysts under supercritical conditions by simultaneous synchrotron-based X-ray techniques

2019 ◽  
Vol 21 (22) ◽  
pp. 11740-11747 ◽  
Author(s):  
Sungwon Lee ◽  
Sungsik Lee ◽  
Duygu Gerceker ◽  
Mrunmayi D. Kumbhalkar ◽  
Kamila M. Wiaderek ◽  
...  
Keyword(s):  
Extreme Conditions ◽  
Nanoscale Materials ◽  
Pt Catalysts ◽  
Supercritical Conditions ◽  
X Ray ◽  
Supported Pt Catalysts ◽  
Level Of Understanding ◽  
Size And Structure ◽  
Operando Studies

Investigation of the size and structure of supported Pt catalysts under supercritical conditions leads to a fundamentally new level of understanding of nanoscale materials under extreme conditions.

scholarly journals Influence of the Reduction Temperature and the Nature of the Support on the Performance of Zirconia and Alumina-Supported Pt Catalysts for n-Dodecane Hydroisomerization

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 88
Author(s):  
Diana García-Pérez ◽  
Maria Consuelo Alvarez-Galvan ◽  
Jose M. Campos-Martin ◽  
Jose L. G. Fierro
Keyword(s):  
Catalytic Activity ◽  
Surface Area ◽  
Catalytic Properties ◽  
Catalytic Performance ◽  
Major Influence ◽  
Pt Catalysts ◽  
Reduction Temperature ◽  
Metal Dispersion ◽  
Tungsten Oxides ◽  
Supported Pt Catalysts

Catalysts based on zirconia- and alumina-supported tungsten oxides (15 wt % W) with a small loading of platinum (0.3 wt % Pt) were selected to study the influence of the reduction temperature and the nature of the support on the hydroisomerization of n-dodecane. The reduction temperature has a major influence on metal dispersion, which impacts the catalytic activity. In addition, alumina and zirconia supports show different catalytic properties (mainly acid site strength and surface area), which play an important role in the conversion. The NH3-TPD profiles indicate that the acidity in alumina-based catalysts is clearly higher than that in their zirconia counterparts; this acidity can be attributed to a stronger interaction of the WOx species with alumina. The PtW/Al catalyst was found to exhibit the best catalytic performance for the hydroisomerization of n-dodecane based on its higher acidity, which was ascribed to its larger surface area relative to that of its zirconia counterparts. The selectivity for different hydrocarbons (C7–10, C11 and i-C12) was very similar for all the catalysts studied, with branched C12 hydrocarbons being the main products obtained (~80%). The temperature of 350 °C was clearly the best reduction temperature for all the catalysts studied in a trickled-bed-mode reactor.

Effect of Ru surface composition on the CO tolerance of Ru modified carbon supported Pt catalysts

2004 ◽  
Vol 6 (8) ◽  
pp. 1792 ◽  
Author(s):  
E. M. Crabb ◽  
M. K. Ravikumar ◽  
D. Thompsett ◽  
M. Hurford ◽  
A. Rose ◽  
...  
Keyword(s):  
Surface Composition ◽  
Pt Catalysts ◽  
Co Tolerance ◽  
Supported Pt Catalysts

Ultrafast studies of metal-metal bond cleavage in Fe3(CO)12 in solution

1995 ◽  
Vol 229 (1-2) ◽  
pp. 469-471 ◽  
Author(s):  
N.J. Tro ◽  
J.C. King ◽  
C.B. Harris
Keyword(s):  
Bond Cleavage ◽  
Metal Bond ◽  
Metal Metal

Methanol electro-oxidation on mesocarbon microbead supported Pt catalysts

Carbon ◽  
2002 ◽  
Vol 40 (13) ◽  
pp. 2375-2380 ◽  
Author(s):  
Yi Cheng Liu ◽  
Xin Ping Qiu ◽  
Yu Qing Huang ◽  
Wen Tao Zhu
Keyword(s):  
Pt Catalysts ◽  
Supported Pt Catalysts ◽  
Electro Oxidation
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