نتایج جستجو برای: catalytic material

تعداد نتایج: 440676  

Journal: :Catalysis Science & Technology 2021

The CuGHK peptide-based porous material acts as a heterogeneous organocatalyst in the Henry reaction due to periodic distribution of pockets decorated with lysine side chain active sites.

2013
V.Ranjith Kumar

Stringent emission regulations around the world necessitate the use of high-efficiency catalytic converters in vehicle exhaust systems. Experimental studies are more expensive than computational studies. Also using computational techniques allows one to obtain all the required data for the Catalytic Converter, some of which could not be measured. In the present work, Geometric modeling ceramic ...

2013
Els De Canck Inmaculada Dosuna-Rodríguez Eric M. Gaigneaux Pascal Van Der Voort

A Periodic Mesoporous Organosilica (PMO) functionalized with sulfonic acid groups has been successfully synthesized via a sequence of post-synthetic modification steps of a trans-ethenylene bridged PMO material. The double bond is functionalized via a bromination and subsequent substitution obtaining a thiol functionality. This is followed by an oxidation towards a sulfonic acid group. After fu...

2014
Xiaohong Wang Beibei He Zhiyu Hu Zhigang Zeng Sheng Han

Precious metal nanoparticles are commonly used as the main active components of various catalysts. Given their high cost, limited quantity, and easy loss of catalytic activity under severe conditions, precious metals should be used in catalysts at low volumes and be protected from damaging environments. Accordingly, reducing the amount of precious metals without compromising their catalytic per...

2014
Matthew D. Yates Bruce E. Logan

Catalytic materials used in many industrial and energy-conversion processes must be durable to maximize their useful lifetimes, especially when expensive precious metal catalysts are utilized. Conventional methods of catalyst formation typically use synthetic stabilizers and reductants to form nanostructures with high surface area and catalytic activity. Synthesized nanomaterials are then mixed...

Journal: :Acta Crystallographica Section A Foundations and Advances 2018

Journal: :Hans Journal of Chemical Engineering and Technology 2018

2012
Rutger van Santen Albert Renken

Catalysis as a scientific discipline originated in the early part of the last century. Earlier, the unique feature of a catalytic substance, namely that when added in small quantities to a reaction it affects its rate and selectivity but is not consumed, had become widely recognized, and many applications had been developed. Only after chemical thermodynamics had been defined did a rational app...

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