Catalytic performance of chitosan-Schiff base supported Pd/Co bimetallic catalyst for acrylamide with phenyl halide

2009 ◽  
pp. n/a-n/a ◽  
Author(s):  
Wang Li-xia ◽  
Wang Zi-wei ◽  
Wang Guo-song ◽  
Lin Xiao-dong ◽  
Ren Jian-guo
Keyword(s):  
Schiff Base ◽  
Bimetallic Catalyst ◽  
Catalytic Performance ◽  
Chitosan Schiff Base ◽  
Supported Pd

scholarly journals Ambient base-free glycerol oxidation over bimetallic PdFe/SiO2 by in situ generated active oxygen species

2021 ◽  
Author(s):  
Ricci Underhill ◽  
Mark Douthwaite ◽  
Richard J. Lewis ◽  
Peter J. Miedziak ◽  
Robert D. Armstrong ◽  
...  
Keyword(s):  
Heterogeneous Catalysts ◽  
Bimetallic Catalyst ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Active Oxygen Species ◽  
Catalytic Performance ◽  
Resonance Spectroscopy ◽  
Oxygen Species ◽  
Paramagnetic Resonance ◽  
Temperature Oxidation

AbstractLow temperature oxidation of alcohols over heterogeneous catalysts is exceptionally challenging, particularly under neutral conditions. Herein, we report on an efficient, base-free method to oxidise glycerol over a 0.5%Pd-0.5%Fe/SiO2 catalyst at ambient temperature in the presence of gaseous H2 and O2. The exceptional catalytic performance was attributed to the in situ formation of highly reactive surface-bound oxygenated species, which promote the dehydrogenation on the alcohol. The PdFe bimetallic catalyst was determined to be significantly more active than corresponding monometallic analogues, highlighting the important role both metals have in this oxidative transformation. Fe leaching was confirmed to occur over the course of the reaction but sequestering experiments, involving the addition of bare carbon to the reactions, confirmed that the reaction was predominantly heterogeneous in nature. Investigations with electron paramagnetic resonance spectroscopy suggested that the reactivity in the early stages was mediated by surface-bound reactive oxygen species; no homogeneous radical species were observed in solution. This theory was further evidenced by a direct H2O2 synthesis study, which confirmed that the presence of Fe in the bimetallic catalyst neither improved the synthesis of H2O2 nor promoted its decomposition over the PdFe/SiO2 catalyst.

Synthesis and catalytic performance of mono-Schiff base manganese(III) complexes with aza-crown or morpholino pendants

2011 ◽  
Vol 37 (1) ◽  
pp. 31-35 ◽  
Author(s):  
Jian-zhang Li ◽  
Xi-yang He ◽  
Jun Zeng ◽  
Zheng-hua Xiao ◽  
Sheng-ying Qin
Keyword(s):  
Schiff Base ◽  
Catalytic Performance

One pot synthesis of new cross-linked chitosan-Schiff' base: Characterization, and anti-proliferative activities

2021 ◽  
Author(s):  
Mohammed Elhag ◽  
Huda E. Abdelwahab ◽  
Mohamed A. Mostafa ◽  
Galila A. Yacout ◽  
Adel Z. Nasr ◽  
...  
Keyword(s):  
Schiff Base ◽  
One Pot ◽  
One Pot Synthesis ◽  
Chitosan Schiff Base

Preparation of Immobilized Chromium Schiff Base Complexes and their Catalytic Performance for Olefins Epoxidation

2014 ◽  
Vol 692 ◽  
pp. 240-244
Author(s):  
Gong De Wu ◽  
Xiao Li Wang ◽  
Zhi Li Zhai
Keyword(s):  
Hydrogen Peroxide ◽  
Schiff Base ◽  
Elemental Analysis ◽  
Catalytic Performance ◽  
Schiff Base Complexes ◽  
Metal Centers ◽  
Chemical Measurements ◽  
Physico Chemical ◽  
Immobilized Complexes ◽  
Mcm 41

A series of transition metal alanine-salicylaldehyde Schiff base chromium (III) complexes immobilized on MCM-41 were prepared and characterized by various physico-chemical measurements such as FIIR, XRD, HRTEM, N2 sorption and elemental analysis. The immobilized complexes were effective and stable catalysts for the epoxidation of styrene and cyclohexene with 30% hydrogen peroxide. Moreover, the metal centers were found to play important roles in the catalytic performance of immobilized complex catalysts.

Self-hydrogen transfer hydrogenolysis of β-O-4 linkages in lignin catalyzed by MIL-100(Fe) supported Pd–Ni BMNPs

2017 ◽  
Vol 19 (19) ◽  
pp. 4538-4543 ◽  
Author(s):  
Jia-wei Zhang ◽  
Guo-ping Lu ◽  
Chun Cai
Keyword(s):  
Hydrogen Transfer ◽  
Catalytic Performance ◽  
Model Compounds ◽  
Lignin Model Compounds ◽  
Organosolv Lignin ◽  
Lignin Model ◽  
Intramolecular Transfer ◽  
Supported Pd

A MIL-100(Fe) supported Pd–Ni BMNP catalyst has been fabricated, and the catalyst exhibits superior catalytic performance toward intramolecular transfer hydrogenolysis of lignin model compounds and organosolv lignin.

Catalytic Performance of Supported Pd Catalyst Prepared with Different Palladium Precursors for Catalytic Combustion of BTH

2019 ◽  
Vol 19 (2) ◽  
pp. 1208-1212
Author(s):  
Sang Chul Jung ◽  
Young-Kwon Park ◽  
Hyuk Ryeol Park ◽  
Ung Il Kang ◽  
Ho-Young Jung ◽  
...  
Keyword(s):  
Catalytic Combustion ◽  
Catalytic Performance ◽  
Pd Catalyst ◽  
Supported Pd
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