Mesoporous Alumina and Aluminosilica with Pd and Pt Nanoparticles:  Structure and Catalytic Properties

2003 ◽  
Vol 15 (13) ◽  
pp. 2623-2631 ◽  
Author(s):  
Lyudmila M. Bronstein ◽  
Dmitri M. Chernyshov ◽  
Robert Karlinsey ◽  
Josef W. Zwanziger ◽  
Valentina G. Matveeva ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Pt Nanoparticles ◽  
Mesoporous Alumina

scholarly journals The Preparation and Catalytic Properties of Nanoporous Pt/CeO2 Composites with Nanorod Framework Structures

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 683 ◽  
Author(s):  
Haiyang Wang ◽  
Dong Duan ◽  
Chen Ma ◽  
Wenyu Shi ◽  
Miaomiao Liang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Catalytic Properties ◽  
Structural Parameters ◽  
Active Oxygen Species ◽  
Pt Nanoparticles ◽  
Strong Interactions ◽  
X Ray ◽  
Small Pore ◽  
Melt Spun

Pt/CeO2 catalysts with nanoporous structures were prepared by the facile dealloying of melt-spun Al92−XCe8PtX (X = 0.1; 0.3 and 0.5) ribbons followed by calcination. The phase compositions and structural parameters of the catalysts were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and high-resolution transmission electron microscopy (HRTEM). The specific surface area and pore size distribution were characterized by N2 adsorption–desorption tests. The catalytic properties were evaluated by a three-way catalyst (TWC) measurement system. The results revealed that the dealloyed samples exhibited a nanorod framework structure. The Pt nanoparticles that formed in situ were supported and highly dispersed on the CeO2 nanorod surface and had sizes in the range of 2–5 nm. For the catalyst prepared from the melt-spun Al91.7Ce8Pt0.3 ribbons, the 50% CO conversion temperature (T50) was 91 °C, and total CO could be converted when the temperature was increased to 113 °C. An X-ray photoelectron spectroscopy (XPS) test showed that the Pt0.3/CeO2 sample had a slightly richer oxygen vacancy; and a H2 temperature-programmed reduction (H2-TPR) test demonstrated its superior adsorption ability for reduction gas and high content of active oxygen species. The experiments indicated that the catalytic performance could be retained without any attenuation after 130 h when water and CO2 were present in the reaction gas. The favorable catalytic activities were attributed to the high specific areas and small pore and Pt particle sizes as well as the strong interactions between the CeO2 and Pt nanoparticles. The Pt nanoparticles were embedded in the surface of the CeO2 nanorods, inhibiting growth. Therefore, the catalytic stability and water resistance were excellent.

Shape-Dependent Catalytic Properties of Pt Nanoparticles

2010 ◽  
Vol 132 (44) ◽  
pp. 15714-15719 ◽  
Author(s):  
Simon Mostafa ◽  
Farzad Behafarid ◽  
Jason R. Croy ◽  
Luis K. Ono ◽  
Long Li ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Pt Nanoparticles

Fabrication of Platinum Nanoparticles through Ionic Liquid Method and its Catalytic Properties in Hydrogenation Reaction

2013 ◽  
Vol 745-746 ◽  
pp. 84-89
Author(s):  
Liu Liu Ding ◽  
Guo Jian Jiang ◽  
Wen Jun Li ◽  
Yun Ying Liu ◽  
Jia Yue Xu
Keyword(s):  
Ionic Liquid ◽  
Hydrogen Pressure ◽  
Room Temperature ◽  
Catalytic Properties ◽  
Pt Nanoparticles ◽  
Hydrogenation Reaction ◽  
Room Temperature Ionic Liquid ◽  
Structure And Morphology ◽  
Mean Diameter ◽  
The Mean

Room temperature ionic liquid [1-butyl-3-methylimidazoliuBF4 was prepared under microwave irradiation. Platinum (Pt) nanoparticles were synthesized in the ionic liquid with ethanol as reductant. The structure and morphology of the Pt nanoparticles were characterized by SEM, FTIR and TG-DTA. The results show that the mean diameter of the nanoparticles was about 10nm and the surface was modified with the room temperature ionic liquid. The catalytic property was evaluated by hydrogenation of benzaldehyde in ethanol and the conversion reached up to 80% under hydrogen pressure.

Selective Hydrogenation of p-Chloronitrobenzene Catalyzed by FexOY@C Supported Pt-Catalyst

2014 ◽  
Vol 960-961 ◽  
pp. 221-224
Author(s):  
Jie Wu ◽  
Guang Yin Fan ◽  
Wen Jun Huang
Keyword(s):  
Reaction Time ◽  
Selective Hydrogenation ◽  
Hydrogen Pressure ◽  
Room Temperature ◽  
Catalytic Properties ◽  
Pt Nanoparticles ◽  
Pt Catalyst ◽  
Water Mixture ◽  
Supported Pt Catalyst

FexOy@C nanocomposites were synthesized and used as carriers for depositing Pt nanoparticles. Catalytic properties of the nanocomposites were investigated for the hydrogenation of p-chloronitrobenzene at room temperature and balloon hydrogen pressure. The catalyst Pt/FexOy@C was extremely active for the hydrogenation of p-chloronitrobenzene. Completely conversion of p-chloronitrobenzene was achieved with a selectivity of 99.7 % in ethanol-water mixture in a reaction time of 40 min. Moreover, it can be reused four times without loss of any activity.

Comparative study of bioethanol transformation catalyzed by Ru or Pt nanoparticles supported on KL zeolite

2016 ◽  
Vol 6 (2) ◽  
pp. 521-529 ◽  
Author(s):  
M. Almohalla ◽  
E. Gallegos-Suarez ◽  
A. Arcoya ◽  
I. Rodríguez-Ramos ◽  
A. Guerrero-Ruiz
Keyword(s):  
Comparative Study ◽  
Noble Metals ◽  
Catalytic Properties ◽  
Pt Nanoparticles ◽  
Selective Transformation ◽  
Kl Zeolite ◽  
Zeolite P

The catalytic properties of two noble metals, Pt and Ru, supported on KL zeolite were investigated in the selective transformation of bioethanol.

The effect of particle size and ligand configuration on the asymmetric catalytic properties of proline-functionalized Pt-nanoparticles

2015 ◽  
Vol 51 (90) ◽  
pp. 16221-16224 ◽  
Author(s):  
Imke Schrader ◽  
Sarah Neumann ◽  
Rieke Himstedt ◽  
Alessandro Zana ◽  
Jonas Warneke ◽  
...  
Keyword(s):  
Particle Size ◽  
Catalytic Properties ◽  
Pt Nanoparticles ◽  
Functionalized Nanoparticles ◽  
Asymmetric Catalytic ◽  
Effect Of Particle Size

Particle size alters activity but not stereoselectivity of ligand-functionalized nanoparticles suggesting that stereoselectivity is primarily determined by the ligand–reactant combination.

Polyaniline stabilized highly dispersed Pt nanoparticles: Preparation, characterization and catalytic properties

2009 ◽  
Vol 69 (8) ◽  
pp. 630-642 ◽  
Author(s):  
A. Drelinkiewicz ◽  
A. Zięba ◽  
J.W. Sobczak ◽  
M. Bonarowska ◽  
Z. Karpiński ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Pt Nanoparticles ◽  
Highly Dispersed

Ultradisperse Pt nanoparticles anchored on defect sites in oxygen-free few-layer graphene and their catalytic properties in CO oxidation

Carbon ◽  
2015 ◽  
Vol 89 ◽  
pp. 290-299 ◽  
Author(s):  
Ekaterina D. Grayfer ◽  
Lidiya S. Kibis ◽  
Andrey I. Stadnichenko ◽  
Oleg Yu. Vilkov ◽  
Andrei I. Boronin ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Catalytic Properties ◽  
Pt Nanoparticles ◽  
Layer Graphene ◽  
Defect Sites ◽  
Few Layer Graphene
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