Increased Metal Utilization in Carbon-Supported Pt Catalysts by Adsorption of Preformed Pt Nanoparticles on Colloidal Silica

Fuel Cells ◽  
2007 ◽  
Vol 7 (4) ◽  
pp. 285-290 ◽  
Author(s):  
J. Zeng ◽  
J. Y. Lee ◽  
J. Chen ◽  
P. K. Shen ◽  
S. Song
Keyword(s):  
Colloidal Silica ◽  
Pt Nanoparticles ◽  
Pt Catalysts ◽  
Supported Pt Catalysts

scholarly journals Highly durable carbon-supported Pt catalysts prepared by hydrosilane-assisted nanoparticle deposition and surface functionalization

2015 ◽  
Vol 51 (27) ◽  
pp. 5883-5886 ◽  
Author(s):  
Akinori Saito ◽  
Hiromi Tsuji ◽  
Iwao Shimoyama ◽  
Ken-ichi Shimizu ◽  
Yuta Nishina
Keyword(s):  
Surface Functionalization ◽  
Pt Nanoparticles ◽  
Carbon Support ◽  
Pt Catalysts ◽  
Support Material ◽  
One Pot ◽  
Nanoparticle Deposition ◽  
Supported Pt Catalysts

Hydrosilane enabled the formation of Pt nanoparticles and the silane functionalization of a carbon support material in one pot.

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

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

scholarly journals Tuning the Reaction Selectivity over MgAl Spinel-Supported Pt Catalyst in Furfuryl Alcohol Conversion to Pentanediols

Catalysts ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 415
Author(s):  
Xinsheng Li ◽  
Jifeng Pang ◽  
Jingcai Zhang ◽  
Xianquan Li ◽  
Yu Jiang ◽  
...  
Keyword(s):  
Furfuryl Alcohol ◽  
Pt Nanoparticles ◽  
Catalytic Performance ◽  
Major Product ◽  
Pt Catalyst ◽  
Reaction Products ◽  
Strong Base ◽  
Reaction Selectivity ◽  
Supported Pt Catalysts ◽  
Alcohol Conversion

Catalytic conversion of biomass-derived feedstock to high-value chemicals is of remarkable significance for alleviating dependence on fossil energy resources. MgAl spinel-supported Pt catalysts were prepared and used in furfuryl alcohol conversion. The approaches to tune the reaction selectivity toward pentanediols (PeDs) were investigated and the catalytic performance was correlated to the catalysts’ physicochemical properties based on comprehensive characterizations. It was found that 1–8 wt% Pt was highly dispersed on the MgAl2O4 support as nanoparticles with small sizes of 1–3 nm. The reaction selectivity did not show dependence on the size of Pt nanoparticles. Introducing LiOH onto the support effectively steered the reaction products toward the PeDs at the expense of tetrahydrofurfuryl alcohol (THFA) selectivity. Meanwhile, the major product in PeDs was shifted from 1,5-PeD to 1,2-PeD. The reasons for the PeDs selectivity enhancement were attributed to the generation of a large number of medium-strong base sites on the Li-modified Pt catalyst. The reaction temperature is another effective factor to tune the reaction selectivity. At 230 °C, PeDs selectivity was enhanced to 77.4% with a 1,2-PeD to 1,5-PeD ratio of 3.7 over 4Pt/10Li/MgAl2O4. The Pt/Li/MgAl2O4 catalyst was robust to be reused five times without deactivation.

scholarly journals Acceptorless dehydrogenation of N -heterocycles by supported Pt catalysts

2017 ◽  
Vol 281 ◽  
pp. 507-511 ◽  
Author(s):  
Sondomoyee K. Moromi ◽  
S.M.A. H. Siddiki ◽  
Kenichi Kon ◽  
Takashi Toyao ◽  
Ken-ichi Shimizu
Keyword(s):  
Pt Catalysts ◽  
Supported Pt Catalysts

Selective oxidation of glycerol in base-free conditions over N-doped carbon film coated carbon supported Pt catalysts

2017 ◽  
Vol 101 ◽  
pp. 107-110 ◽  
Author(s):  
Lihua Yang ◽  
Xuewen Li ◽  
Yanyan Sun ◽  
Linhai Yue ◽  
Jie Fu ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Carbon Film ◽  
Pt Catalysts ◽  
Supported Pt Catalysts ◽  
Coated Carbon
Sign in / Sign up

Export Citation Format

Share Document