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.

Microstructure and reactivity of small metal particles: The role of Ce additives

1992 ◽  
Vol 50 (1) ◽  
pp. 318-319
Author(s):  
L.D. Schmidt ◽  
K. R. Krause ◽  
J. M. Schwartz ◽  
X. Chu
Keyword(s):  
Atmospheric Pressure ◽  
Noble Metals ◽  
Mixed Oxides ◽  
Catalytic Properties ◽  
Chemical Shifts ◽  
Catalytic Converter ◽  
Structural Evolution ◽  
Single Particles ◽  
Small Metal Particles

The evolution of microstructures of 10- to 100-Å diameter particles of Rh and Pt on SiO2 and Al2O3 following treatment in reducing, oxidizing, and reacting conditions have been characterized by TEM. We are able to transfer particles repeatedly between microscope and a reactor furnace so that the structural evolution of single particles can be examined following treatments in gases at atmospheric pressure. We are especially interested in the role of Ce additives on noble metals such as Pt and Rh. These systems are crucial in the automotive catalytic converter, and rare earths can significantly modify catalytic properties in many reactions. In particular, we are concerned with the oxidation state of Ce and its role in formation of mixed oxides with metals or with the support. For this we employ EELS in TEM, a technique uniquely suited to detect chemical shifts with ∼30Å resolution.

Influence of the Copper(II) Oxide Dispersion on its Catalytic Properties in Carbon Monoxide Oxidation: A Comparative Study by Using Two Types of Catalytic Reactors

ChemCatChem ◽  
2016 ◽  
Vol 8 (22) ◽  
pp. 3546-3555 ◽  
Author(s):  
Dmitry A. Svintsitskiy ◽  
Ilya Yu. Pakharukov ◽  
Elena M. Slavinskaya ◽  
Tatyana Yu. Kardash ◽  
Valentin N. Parmon ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Comparative Study ◽  
Catalytic Properties ◽  
Carbon Monoxide Oxidation ◽  
Oxide Dispersion ◽  
Catalytic Reactors

Irradiation regulates the size of Pt nanoparticles on Au@MnO2 nanosheets for electrocatalytic hydrogen evolution

2021 ◽  
Author(s):  
Ting Li ◽  
Yidan Liu ◽  
Rongrong Jia ◽  
Yaseen Muhammad ◽  
Li-Yi Shi ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Noble Metals ◽  
Pt Nanoparticles ◽  
Mno2 Nanosheets

Regulating the size of noble metals over oxide nanosheets have been attracting great attention in the fields of electrochemistry and catalysis. Photodeposition process is green, mild and controllable but limited...

scholarly journals Characterization and Catalytic Properties of Free and Silica-Bound Lipase: a Comparative Study

2014 ◽  
Vol 63 (6) ◽  
pp. 599-605 ◽  
Author(s):  
Sunil Kumar Narwal ◽  
Nitin Kumar Saun ◽  
Reena Gupta
Keyword(s):  
Comparative Study ◽  
Catalytic Properties ◽  
Lipase A

Influence of noble metals on the structural and catalytic properties of Ce-doped SnO2 systems

2004 ◽  
Vol 97 (1) ◽  
pp. 31-38 ◽  
Author(s):  
Ingrid T Weber ◽  
Antônio Valentini ◽  
L.F.D Probst ◽  
Elson Longo ◽  
Edson R Leite
Keyword(s):  
Noble Metals ◽  
Catalytic Properties

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.

Skeletal isomerization of n -pentane: A comparative study on catalytic properties of Pt/WO x –ZrO 2 and Pt/ZSM-22

2017 ◽  
Vol 537 ◽  
pp. 59-65 ◽  
Author(s):  
Wei Li ◽  
Kebin Chi ◽  
Hao Liu ◽  
Huaijun Ma ◽  
Wei Qu ◽  
...  
Keyword(s):  
Comparative Study ◽  
Catalytic Properties ◽  
Skeletal Isomerization

Comparative Study of Combustion Methods, Opto-Magnetic and Catalytic Properties of Spinel CoAl2O4 Nano- and Microstructures

2015 ◽  
Vol 7 (8) ◽  
pp. 672-682 ◽  
Author(s):  
S. Jayasree ◽  
Ayyar Manikandan ◽  
A. M. Uduman Mohideen ◽  
C. Barathiraja ◽  
Susaimanickam Arul Antony
Keyword(s):  
Comparative Study ◽  
Catalytic Properties

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
Sign in / Sign up

Export Citation Format

Share Document