Engineering Co3+-rich Crystal Planes on Co3O4 Hexagonal Nanosheets for CO and Hydrocarbons Oxidation with Enhanced Catalytic Activity and Water Resistance

2021 ◽  
pp. 130448
Author(s):  
Shuaiqi Zhao ◽  
Tan Li ◽  
Jiajin Lin ◽  
Peng Wu ◽  
Yifei Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Water Resistance

Effect of surface acidity on the catalytic activity and deactivation of supported sulfonic acids during dehydration of methanol to DME

2020 ◽  
Vol 44 (39) ◽  
pp. 16810-16820
Author(s):  
Rosanna Viscardi ◽  
Vincenzo Barbarossa ◽  
Daniele Mirabile Gattia ◽  
Raimondo Maggi ◽  
Giovanni Maestri ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Sulfonic Acid ◽  
Water Resistance ◽  
Surface Acidity ◽  
Acid Catalyst ◽  
Acid Sites ◽  
Sulfonic Acids ◽  
Effect Of Surface

Superiorty of the supported sulfonic acid catalyst in terms of the water resistance and efficiency of the acid sites compared to the commercial reference.

Cu/Mn co-loaded hierarchically porous zeolite beta: a highly efficient synergetic catalyst for soot oxidation

2015 ◽  
Vol 3 (18) ◽  
pp. 9745-9753 ◽  
Author(s):  
Xiaoxia Zhou ◽  
Hangrong Chen ◽  
Guobin Zhang ◽  
Jin Wang ◽  
Zhiguo Xie ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Oxidation ◽  
Hydrothermal Treatment ◽  
Water Resistance ◽  
Soot Oxidation ◽  
Zeolite Beta ◽  
Hierarchically Porous ◽  
Highly Efficient ◽  
Mn Species ◽  
Surfactant Assisted

A hierarchically porous zeolite beta as a carrier was made by surfactant-assisted hydrothermal treatment and subsequent alkali etching, and the Cu/Mn species were co-loaded into the carrier. The obtained catalyst exhibits excellent catalytic activity and water-resistance for soot catalytic oxidation.

scholarly journals Effect of Preparation Methods on the Performance of Pt/TiO2 Catalysts for the Catalytic Oxidation of Carbon Monoxide in Simulated Sintering Flue Gas

Catalysts ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 804
Author(s):  
Jianyu Cai ◽  
Zehui Yu ◽  
Jian Li
Keyword(s):  
Particle Size ◽  
Catalytic Activity ◽  
Flue Gas ◽  
Ball Mill ◽  
Water Resistance ◽  
Physical Structure ◽  
Impregnation Method ◽  
Oxidation Of Co ◽  
Preparation Methods ◽  
So2 Adsorption

A series of Pt/TiO2 catalysts were prepared by the impregnation (IM), dry ball mill (DB), or wet ball mill (WB) methods, and their catalytic activity for the oxidation of CO was evaluated. The structure and redox properties of the catalysts were investigated by N2 desorption, XRD, SEM, TEM, XPS, H2-TPR, SO2-TPD, and CO chemisorption analysis. It was determined that the preparation method affects the physical structure of the catalyst and the particle size and dispersion of Pt on the catalyst surface. The catalyst prepared by the impregnation method had a more suitable physical structure than the other catalysts, with a smaller particle size, a higher dispersion of Pt on the surface, and the lowest strength of SO2 adsorption. Pt/TiO2(IM) catalysts presented the best catalytic activity for the oxidation of CO in simulated sintering flue gas at 140 °C, as well as better sulfur and water resistance with simulated sintering flue gas containing 50 ppm of SO2 and 15% water vapor.

Engineering surface defects and metal–support interactions on Pt/TiO2(B) nanobelts to boost the catalytic oxidation of CO

2018 ◽  
Vol 8 (19) ◽  
pp. 4934-4944 ◽  
Author(s):  
Jinghua Liu ◽  
Tong Ding ◽  
Hao Zhang ◽  
Guangcheng Li ◽  
Jinmeng Cai ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Oxidation ◽  
Water Resistance ◽  
Surface Defects ◽  
High Catalytic Activity ◽  
Oxidation Of Co ◽  
Catalytic Oxidation Of Co ◽  
Metal Support ◽  
Metal Support Interactions

The thermally reduced Pt/TiO2(B) catalysts show high catalytic activity and good water resistance for the catalytic oxidation of CO.

Facile surface improvement of LaCoO3 perovskite with high activity and water resistance towards toluene oxidation: Ca substitution and citric acid etching

2020 ◽  
Vol 10 (17) ◽  
pp. 5829-5839
Author(s):  
Hanlin Chen ◽  
Gaoling Wei ◽  
Xiaoliang Liang ◽  
Peng Liu ◽  
Yunfei Xi ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Citric Acid ◽  
High Activity ◽  
Water Resistance ◽  
Acid Etching ◽  
Toluene Oxidation ◽  
Ca Substitution ◽  
Surface Improvement

We employ two facile modification methods, i.e., Ca substitution and citric acid etching, to further improve the catalytic activity of LaCoO3 perovskite towards toluene oxidation.

scholarly journals Pt/Fe co-loaded mesoporous zeolite beta for CO oxidation with high catalytic activity and water resistance

RSC Advances ◽  
2019 ◽  
Vol 9 (48) ◽  
pp. 28089-28094 ◽  
Author(s):  
Qinru Li ◽  
Xiaoxia Zhou ◽  
Wanpeng Zhao ◽  
Chunlei Peng ◽  
Huixia Wu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ion Exchange ◽  
Ethylene Glycol ◽  
Co Oxidation ◽  
Water Resistance ◽  
Reduction Method ◽  
Zeolite Beta ◽  
High Catalytic Activity ◽  
Mesoporous Zeolite ◽  
Highly Dispersed

A series of Pt/Fe co-loaded mBeta catalysts with highly dispersed Pt species have been successfully prepared by an ion exchange and subsequent ethylene glycol reduction method, and show excellent catalytic activity and durability in CO oxidation.

High resolution electron microscopy of lanthanum phosphate crystals

1978 ◽  
Vol 36 (1) ◽  
pp. 274-275
Author(s):  
J. C. Wheatley ◽  
J. M. Cowley
Keyword(s):  
Electron Microscopy ◽  
Catalytic Activity ◽  
High Resolution ◽  
Petroleum Industry ◽  
High Resolution Electron Microscopy ◽  
Lanthanum Phosphate ◽  
Good Catalyst ◽  
Resolution Electron ◽  
Good Catalytic Activity ◽  
Physical And Chemical

Rare-earth phosphates are of particular interest because of their catalytic properties associated with the hydrolysis of many aromatic chlorides in the petroleum industry. Lanthanum phosphates (LaPO4) which have been doped with small amounts of copper have shown increased catalytic activity (1). However the physical and chemical characteristics of the samples leading to good catalytic activity are not known.Many catalysts are amorphous and thus do not easily lend themselves to methods of investigation which would include electron microscopy. However, the LaPO4, crystals are quite suitable samples for high resolution techniques.The samples used were obtained from William L. Kehl of Gulf Research and Development Company. The electron microscopy was carried out on a JEOL JEM-100B which had been modified for high resolution microscopy (2). Standard high resolution techniques were employed. Three different sample types were observed: 669A-1-5-7 (poor catalyst), H-L-2 (good catalyst) and 27-011 (good catalyst).

The design and catalytic performance of molybdenum active sites on an MCM-41 framework for the aerobic oxidation of 5-hydroxymethylfurfural to 2,5-diformylfuran

2019 ◽  
Vol 9 (3) ◽  
pp. 811-821 ◽  
Author(s):  
Zhao-Meng Wang ◽  
Li-Juan Liu ◽  
Bo Xiang ◽  
Yue Wang ◽  
Ya-Jing Lyu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Active Sites ◽  
Aerobic Oxidation ◽  
Catalytic Performance ◽  
Mcm 41

The catalytic activity decreases as –(SiO)3Mo(OH)(O) > –(SiO)2Mo(O)2 > –(O)4–MoO.

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