Effect of calcium addition in plasma catalysis for toluene removal by Ni/ZSM-5 : Acidity/basicity, catalytic activity and reaction mechanism

The catalytic activity and high selectivity reported by bimetallic heteroscorpionate acetate zinc complexes in ring-opening copolymerization (ROCOP) reactions involving CO2 as substrate encouraged us to expand their use as catalysts for ROCOP of cyclohexene oxide (CHO) and cyclic anhydrides. Among the catalysts tested for the ROCOP of CHO and phthalic anhydride at different reaction conditions, the most active catalytic system was the combination of complex 3 with bis(triphenylphosphine)iminium as cocatalyst in toluene at 80 °C. Once the optimal catalytic system was determined, the scope in terms of other cyclic anhydrides was broadened. The catalytic system was capable of copolymerizing selectively and efficiently CHO with phthalic, maleic, succinic and naphthalic anhydrides to afford the corresponding polyester materials. The polyesters obtained were characterized by spectroscopic, spectrometric, and calorimetric techniques. Finally, the reaction mechanism of the catalytic system was proposed based on stoichiometric reactions.

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The effect of defects on the catalytic activity of single Au atom supported carbon nanotubes and reaction mechanism for CO oxidation

Physical Chemistry Chemical Physics ◽

10.1039/c7cp03793g ◽

2017 ◽

Vol 19 (33) ◽

pp. 22344-22354 ◽

Cited By ~ 13

Author(s):

Sajjad Ali ◽

Tian Fu Liu ◽

Zan Lian ◽

Bo Li ◽

Dang Sheng Su

Keyword(s):

Carbon Nanotubes ◽

Density Functional Theory ◽

Catalytic Activity ◽

Carbon Nanotube ◽

Reaction Mechanism ◽

Co Oxidation ◽

Density Functional ◽

Functional Theory ◽

Single Walled Carbon Nanotube ◽

Wales Defect

The mechanism of CO oxidation by O2 on a single Au atom supported on pristine, mono atom vacancy (m), di atom vacancy (di) and the Stone Wales defect (SW) on single walled carbon nanotube (SWCNT) surface is systematically investigated theoretically using density functional theory.

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Oxidative decarboxylation of isocitric acid in the presence of montmorillonite

Clay Minerals ◽

10.1180/claymin.1990.025.1.04 ◽

1990 ◽

Vol 25 (1) ◽

pp. 27-37 ◽

Cited By ~ 8

Author(s):

A. Naidja ◽

B. Siffert

Keyword(s):

Catalytic Activity ◽

Reaction Mechanism ◽

Nicotinamide Adenine Dinucleotide ◽

Reaction Rate ◽

Nicotinamide Adenine Dinucleotide Phosphate ◽

Oxidative Decarboxylation ◽

Enzymatic System ◽

Exchangeable Cation ◽

Isocitric Acid ◽

Dehydrogenase Enzyme

AbstractIsocitric acid oxidative decarboxylation was realized in the absence and in the presence of homoionic Na+-, Mn2+-, and Cu2+-montmorillonite. The catalytic activity of the clay depends upon the nature of the interlayer exchangeable cation. Isocitric acid is transformed into α-ketoglutaric acid under the action of the clay mineral saturated with Na+ cations which do not form a complex with the isocitrate anion. Nevertheless, the reaction rate is very much lower than in the presence of the enzymatic system (isocitrate dehydrogenase enzyme and nicotinamide adenine dinucleotide phosphate coenzyme). The reaction mechanism in the presence of clay is given showing the different steps of the transformation.

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Effect of in situ Fe(ii)/Fe(iii)-doping on the visible light-Fenton-like catalytic activity of Bi/BiOBr hierarchical microspheres

Catalysis Science & Technology ◽

10.1039/c6cy02195f ◽

2017 ◽

Vol 7 (3) ◽

pp. 658-667 ◽

Cited By ~ 15

Author(s):

Xin Geng ◽

Wentao Li ◽

Feng Xiao ◽

Dongsheng Wang ◽

Lian Yang

Keyword(s):

Catalytic Activity ◽

Reaction Mechanism ◽

Visible Light ◽

Catalytic Reaction ◽

Hierarchical Microspheres ◽

Catalytic Reaction Mechanism

Scheme of the visible light-Fenton-like catalytic reaction mechanism.

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Research on Additives Assisted Catalytic Cyclo-Dehydration of 1, 4-Butanediol to Tetrahydrofuran in Near-Critical Water

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.550-553.693 ◽

2012 ◽

Vol 550-553 ◽

pp. 693-698 ◽

Cited By ~ 1

Author(s):

Yan Yang ◽

Li Yi Dai ◽

Jin Shou Wang ◽

Hong Yan Zhou

Keyword(s):

Catalytic Activity ◽

Reaction Mechanism ◽

Maximum Yield ◽

Experimental Results ◽

Time Range ◽

Temperature Range ◽

Experimental Parameters ◽

Increasing Temperature ◽

Water Ratio

We herein report the cyclo-dehydration of 1,4-butanediol (BD) assisted with additives to form tetrahydrofuran (THF) in near-critical water (NCW).Three additives including Fe2(SO4)3,ZnSO4 and NaHSO4 were screened. Effects of various experimental parameters such as temperature (260-340°C), time (60-180min), reactant/water ratio (r/w, 1:10-1:40) and pressure (15-25MPa) on the yield of THF were examined. Without the presence of additives, the results showed that increasing temperature favored the cyclo-dehydration of BD to form THF. The maximum yield (52.61 wt. %) was obtained at temperature of 340°C and time of 180 min. With the presence of additives, at temperature range of 260~300°C and time range of 60~130min, all the additives selected can promote the cyclo-dehydration of BD to yield THF. However, with further increasing temperature and time, the additives would suppress the formation of THF. The catalytic activity toward the production of THF in the order of Fe2(SO4)3> ZnSO4> NaHSO4. The maximum yield of THF assisted with Fe2(SO4)3 could reach as high as 59.85 wt. % at 320°C, 120 min. Large reactant/water ratio would not benefit the yield of THF because of the dilution of additive. Increasing the pressure will slightly increase the yield of THF. Base on experimental results, a possible reaction mechanism and pathway of dehydration of BD was proposed in NCW.

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Oxygen reduction reaction mechanism on P, N co-doped graphene: a density functional theory study

New Journal of Chemistry ◽

10.1039/c9nj04808a ◽

2019 ◽

Vol 43 (48) ◽

pp. 19308-19317 ◽

Cited By ~ 5

Author(s):

Zhao Liang ◽

Chao Liu ◽

Mingwei Chen ◽

Xiaopeng Qi ◽

Pramod Kumar U. ◽

...

Keyword(s):

Density Functional Theory ◽

Catalytic Activity ◽

Reaction Mechanism ◽

Dft Calculations ◽

Density Functional ◽

Reduction Reaction ◽

Density Functional Theory Study ◽

Functional Theory ◽

Doped Graphene ◽

Co Doped

DFT calculations confirmed that the P–N coupled site changed the ORR pathway and improved the catalytic activity compared with single doping.

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The Catalytic Activity of Metal Chlorides and the Reaction Mechanism in Oxychlorination

The Journal of the Society of Chemical Industry Japan ◽

10.1246/nikkashi1898.69.8_1463 ◽

1966 ◽

Vol 69 (8) ◽

pp. 1463-1466 ◽

Cited By ~ 6

Author(s):

Naoyuki TODO ◽

Minoru KURITA ◽

Hiroyuki HAGIWARA

Keyword(s):

Catalytic Activity ◽

Reaction Mechanism ◽

Metal Chlorides

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Iron incorporation affecting the structure and boosting catalytic activity of β-Co(OH)2: exploring the reaction mechanism of ultrathin two-dimensional carbon-free Fe3O4-decorated β-Co(OH)2nanosheets as efficient oxygen evolution electrocatalysts

Journal of Materials Chemistry A ◽

10.1039/c6ta10902k ◽

2017 ◽

Vol 5 (15) ◽

pp. 6849-6859 ◽

Cited By ~ 42

Author(s):

Fengzhan Sun ◽

Linbo Li ◽

Guo Wang ◽

Yuqing Lin

Keyword(s):

Catalytic Activity ◽

Reaction Mechanism ◽

Oxygen Evolution ◽

First Principles ◽

Oxygen Evolution Reaction ◽

First Principles Calculation ◽

Two Dimensional ◽

Iron Incorporation

Ultrathin two-dimensional Fe3O4-decorated β-Co(OH)2nanosheets are synthesized for oxygen evolution reaction and reaction mechanism is explored by first principles calculation.

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