Palladium, Palladium–Tin, and Palladium–Silver Catalysts in the Selective Hydrogenation of Hexadienes: TPR, Mössbauer, and Infrared Studies of Adsorbed CO

2000 ◽  
Vol 195 (1) ◽  
pp. 88-95 ◽  
Author(s):  
Emerson Andrade Sales ◽  
Jose Jove ◽  
Mario de Jesus Mendes ◽  
François Bozon-Verduraz
Keyword(s):  
Selective Hydrogenation ◽  
Silver Catalysts ◽  
Infrared Studies ◽  
Adsorbed Co ◽  
Palladium Silver

Mechanism of Selective Hydrogenation of α,β-Unsaturated Aldehydes on Silver Catalysts: A Density Functional Study

2009 ◽  
Vol 113 (30) ◽  
pp. 13231-13240 ◽  
Author(s):  
Kok Hwa Lim ◽  
Amjad B. Mohammad ◽  
Ilya V. Yudanov ◽  
Konstantin M. Neyman ◽  
Michael Bron ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Density Functional ◽  
Functional Study ◽  
Density Functional Study ◽  
Unsaturated Aldehydes ◽  
Silver Catalysts

Selective hydrogenation of acrolein on supported silver catalysts: A kinetics study of particle size effects

2013 ◽  
Vol 298 ◽  
pp. 18-26 ◽  
Author(s):  
Haojuan Wei ◽  
Carolina Gomez ◽  
Jingjing Liu ◽  
Neng Guo ◽  
Tianpin Wu ◽  
...  
Keyword(s):  
Particle Size ◽  
Selective Hydrogenation ◽  
Size Effects ◽  
Kinetics Study ◽  
Particle Size Effects ◽  
Silver Catalysts

scholarly journals Facile Redox Synthesis of Novel Bimetallic Crn+/Pd0 Nanoparticles Supported on SiO2 and TiO2 for Catalytic Selective Hydrogenation with Molecular Hydrogen

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 583
Author(s):  
Olga A. Kirichenko ◽  
Elena A. Redina ◽  
Gennady I. Kapustin ◽  
Marina S. Chernova ◽  
Anastasiya A. Shesterkina ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Photoelectron Spectroscopy ◽  
Catalytic Reduction ◽  
Pd Nanoparticles ◽  
Nanoparticle Size ◽  
Ambient Conditions ◽  
Pd Catalysts ◽  
Adsorbed Co ◽  
Temperature Programmed ◽  
Redox Method

The bimetallic Crn+/Pd0 nanoparticles have been synthesized for the first time by a two-step redox method. The method includes the deposition of Pd0 nanoparticles on the surface of SiO2 and TiO2 carriers followed by the deposition of Crn+ on the surface of Pd0 nanoparticles using the redox procedures, which are based on the catalytic reduction of Crn+ with H2 in aqueous suspensions at ambient conditions. Transmission (TEM) and scanning (SEM) electron microscopy, X-ray photoelectron spectroscopy (XPS), Fourie-transformed infrared spectroscopy of adsorbed CO (FTIR-CO), and CO chemisorption studies were performed to characterize the morphology, nanoparticle size, element, and particle distribution, as well as the electronic state of deposited metals in the obtained catalysts. A decrease in nanoparticle size from 22 nm (Pd/SiO2) to 2–6 nm (Pd/TiO2) makes possible deposition of up to 1.1 wt.% Cr most likely as Cr3+. The deposition of CrOx species on the surface of Pd nanoparticles was confirmed using FTIR of adsorbed CO and the method of temperature-programmed reduction with hydrogen (TPR-H2). The intensive hydrogen consumption in the temperature ranges from −50 °C to 40 °C (Cr/Pd/SiO2) and from −90 °C to −40 °C (Cr/Pd/TiO2) was first observed for the supported Pd catalysts. The decrease in the temperature of β-PdHx decomposition indicates the strong interaction between the deposited Crn+ species and Pd0 nanoparticle after reduction with H2 at 500 °C. The novel Crn+/Pd/TiO2 catalysts demonstrated a considerably higher activity in selective hydrogenation of phenylacetylene than the Pd/TiO2 catalyst at ambient conditions.

Sign in / Sign up

Export Citation Format

Share Document