Enhanced catalytic activity with high thermal stability based on multiple Au cores in the interior of mesoporous Si–Al shells

RSC Advances ◽  
2015 ◽  
Vol 5 (60) ◽  
pp. 48187-48193 ◽  
Author(s):  
Yiwei Zhang ◽  
Sanming Xiang ◽  
Yuming Zhou ◽  
Yuanmei Xu ◽  
Zewu Zhang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Catalytic Activity ◽  
High Activity ◽  
High Thermal Stability

Mesoporous Si–Al/Au nanocatalysts were synthesized by combining the advantage of good permeability from mesoporous Si–Al shells and the high activity upon multiple Au cores.

Low-migratory ionic ferrocene-based burning rate catalysts with high combustion catalytic efficiency

2015 ◽  
Vol 39 (1) ◽  
pp. 155-162 ◽  
Author(s):  
Xuelin Liu ◽  
Weiqiang Zhang ◽  
Guofang Zhang ◽  
Ziwei Gao
Keyword(s):  
Thermal Stability ◽  
Catalytic Activity ◽  
Thermal Degradation ◽  
Burning Rate ◽  
Ammonium Perchlorate ◽  
Catalytic Efficiency ◽  
High Thermal Stability ◽  
Ionic Compounds

1-(Ferrocenylmethyl)alkylimidazolium-based ionic compounds with low-migration, high thermal stability and catalytic activity in the thermal degradation of ammonium perchlorate were synthesized and characterized.

Nanoporous high-entropy alloys for highly stable and efficient catalysts

2019 ◽  
Vol 7 (11) ◽  
pp. 6499-6506 ◽  
Author(s):  
Hua-Jun Qiu ◽  
Gang Fang ◽  
Yuren Wen ◽  
Pan Liu ◽  
Guoqiang Xie ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Catalytic Activity ◽  
High Thermal Stability ◽  
High Entropy Alloys ◽  
High Entropy

A general dealloying strategy is developed to prepare multi-component alloys with high thermal stability, electrochemical durability, and catalytic activity.

scholarly journals Improvement of thermal stability of highly active species on SiO2 supported copper-ceria catalysts

RSC Advances ◽  
2021 ◽  
Vol 11 (53) ◽  
pp. 33271-33275
Author(s):  
Gonzalo Aguila ◽  
Rafael Calle ◽  
Sichem Guerrero ◽  
Patricio Baeza ◽  
Paulo Araya
Keyword(s):  
Thermal Stability ◽  
High Activity ◽  
Active Species ◽  
High Thermal Stability ◽  
Highly Active ◽  
Ceria Catalysts ◽  
Thermal Stability Of

CuO–CeO2/SiO2 catalysts with Ce loading of 24% and above keep high activity after calcination at 700 °C. Therefore, a catalyst with high thermal stability of CuO–CeO2 interface can be obtained able to work in a higher range of temperatures.

Ionic Liquids: A Versatile Medium for the Synthesis of Six-membered Two Nitrogen- Containing Heterocycles

2019 ◽  
Vol 23 (1) ◽  
pp. 76-96 ◽  
Author(s):  
Navjeet Kaur
Keyword(s):  
Thermal Stability ◽  
Ionic Liquids ◽  
High Activity ◽  
Organic Synthesis ◽  
Vapour Pressure ◽  
Reaction Medium ◽  
High Thermal Stability ◽  
Organic Reaction ◽  
Major Subject ◽  
The Subject

Due to special properties of ILs (ionic liquids) like their wide liquid range, good solvating ability, negligible vapour pressure, non-inflammability, environmentfriendly medium, high thermal stability, easy recycling and rate promoters etc. they are used in organic synthesis. Therefore, ionic liquids have attracted the attention of chemists and act as a catalyst and reaction medium in organic reaction with high activity. There is no doubt that ionic liquids have become a major subject of study for modern chemistry. More publications in the field have been observed each year, although there is some evidence that this is beginning to plateau at approximately 3500 papers each year. They have been the subject of several major reviews and books, dealing with different applications and aspects of their behavior. Highly efficient methods are explored for the preparation of six-membered two nitrogen-containing heterocycles with the application of IL as a catalyst and reaction medium from 1893 to 2018.

scholarly journals Flowerlike hybrid horseradish peroxidase nanobiocatalyst for the polymerization of guaiacol

2020 ◽  
Vol 44 (5) ◽  
pp. 1285-1292
Author(s):  
Ersen GÖKTÜRK
Keyword(s):  
Thermal Stability ◽  
Catalytic Activity ◽  
Horseradish Peroxidase ◽  
High Thermal Stability ◽  
Polymerization Reaction ◽  
Molecular Weights ◽  
Repeated Use ◽  
High Yields ◽  
Phosphate Buffered Saline ◽  
Very High

In this study, the catalytic activity and stability of flowerlike hybrid horseradish peroxidase (HRP) nanobiocatalyst (HRPCu2+) obtained from Cu2+ ions and HRP enzyme in the polymerization reaction of guaiacol were analyzed. We demonstrated that HRP-Cu2+ and hydrogen peroxide (H2O2) initiator showed significantly increased catalytic activity and stability on the polymerization of guaiacol compared to that of free HRP enzyme. Poly(guaiacol) was observed with quite high yields (88%) and molecular weights (38,000 g/mol) under pH 7.4 phosphate-buffered saline (PBS) conditions at 60 °C with 5 weight% of HRP-Cu2+ loading. HRP-Cu2+ also shows very high thermal stability and works even at 70 °C reaction temperature; free HRP enzyme denatures at that temperature. Furthermore, HRP-Cu2+ provided considerable repeated use and showed some degree of catalytic activity, even after the fourth recycle, in the polymerization of guaiacol.

Balancing high thermal stability with high activity in diaryliminoacenaphthene-nickel(II) catalysts for ethylene polymerization

2017 ◽  
Vol 55 (12) ◽  
pp. 1971-1983 ◽  
Author(s):  
Yanjun Chen ◽  
Shizhen Du ◽  
Chuanbing Huang ◽  
Gregory A. Solan ◽  
Xiang Hao ◽  
...  
Keyword(s):  
Thermal Stability ◽  
High Activity ◽  
Ethylene Polymerization ◽  
High Thermal Stability

SiO2 (core)-TiO2 (shell) Structure as Catalyst Support for Oxidation of CO at Low Temperatures

2007 ◽  
Vol 334-335 ◽  
pp. 1025-1028
Author(s):  
Zi Yi Zong ◽  
Xi Jiang Yin ◽  
Li Fang Lew ◽  
Soo Yee Tan
Keyword(s):  
Thermal Stability ◽  
Catalytic Activity ◽  
Shell Structure ◽  
Low Temperatures ◽  
Au Nanoparticles ◽  
Catalyst Support ◽  
High Thermal Stability ◽  
Core Shell ◽  
Oxidation Of Co ◽  
Core Shell Structure

In this study, TiO2 was successfully coated on Stober silica beads followed by depositing Au nanoparticles on this core-shell structure. The size of the Au nanoparticles was well controlled in the range of 2 – 7 nm. This composite exhibited high thermal stability. When used as a model catalyst for oxidation of CO at low temperatures, the Au/TiO2/SiO2 showed a much higher catalytic activity than the Au/SiO2 and Au/TiO2(P25) catalysts.

Wide-bandgap bipolar material with high thermal stability

2019 ◽  
pp. 903
Author(s):  
Sheng-Chieh Lin ◽  
Yu-Chieh Cheng ◽  
Man-Kit Leung ◽  
Jiun-Haw Lee ◽  
Tien-Lung Chiu
Keyword(s):  
Thermal Stability ◽  
Wide Bandgap ◽  
High Thermal Stability
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