The synthesis of heterogeneous 7-amino-1-naphthalene sulfonic acid immobilized silica nano particles and its catalytic activity

2011 ◽  
Vol 42 (5) ◽  
pp. 843-851 ◽  
Author(s):  
Farook Adam ◽  
Kasim Mohammed Hello ◽  
Maysun Ramadan Ben Aisha
Keyword(s):  
Catalytic Activity ◽  
Sulfonic Acid ◽  
Nano Particles ◽  
Naphthalene Sulfonic Acid

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.

Effects of Supports on Hydrogen Adsorption on Pt Clusters

2008 ◽  
Vol 139 ◽  
pp. 41-46 ◽  
Author(s):  
K. Okazaki-Maeda ◽  
Y. Morikawa ◽  
Shingo Tanaka ◽  
Masanori Kohyama
Keyword(s):  
Catalytic Activity ◽  
First Principles ◽  
Carbon Materials ◽  
Hydrogen Adsorption ◽  
Nano Particles ◽  
High Dispersion ◽  
Graphene Sheets ◽  
First Principles Calculations ◽  
Small Clusters ◽  
Atom Absorption

Pt nano-particles are supported on carbon materials at the electrode catalysts of protonexchange menbrane fuel cells. Pt nano-particles are desirable to be strongly adsorbed on carbon materials for high dispersion, although strong Pt-C interactions may affect the catalytic activity of small clusters. Thus we have examined H-atom absorption on Pt clusters supported or unsupported on graphene sheets, using first-principles calculations. For Pt-atom/graphene systems, a H atom is more weakly adsorbed than for a free Pt atom, and the H-Pt interaction becomes weaker if the interaction between a Pt atom and graphene becomes stronger. For the Ptn-cluster/graphene systems (n=2-4), the H-Pt interactions are also substantially changed from those for free Pt clusters. In the Pt clusters on graphene, the Pt-Pt distances are substantially changed associated with the electronicstructure changes by the Pt-C interactions. These structural and electronic changes in the Pt clusters as well as the presence of graphene itself seem to cause the changes in the absorption energies and preferential sites of H-atom absorption.

scholarly journals Synthesis and characterization of silica-supported Preyssler nano particles and its catalytic activity for photodegradation of methyl orange

2009 ◽  
Vol 2 (1) ◽  
pp. 35-41 ◽  
Author(s):  
Fatemeh F. Bamoharram ◽  
Majid M. Heravi ◽  
Mina Roushani ◽  
Maryam R. Toosi ◽  
Ladan Jodeyre
Keyword(s):  
Catalytic Activity ◽  
Methyl Orange ◽  
Nano Particles ◽  
Synthesis And Characterization

Improved Catalytic Activity and Stability Using Mixed Sulfonic Acid- and Hydroxy-Bearing Polymer Brushes in Microreactors

2014 ◽  
Vol 6 (12) ◽  
pp. 9386-9392 ◽  
Author(s):  
Roberto Ricciardi ◽  
Rajesh Munirathinam ◽  
Jurriaan Huskens ◽  
Willem Verboom
Keyword(s):  
Catalytic Activity ◽  
Polymer Brushes ◽  
Sulfonic Acid

Catalytic Activity of Pt Nano-Particles for H2 Formation

2013 ◽  
Vol 57 (1-4) ◽  
pp. 273-281 ◽  
Author(s):  
Egill Skúlason ◽  
Avan A. Faraj ◽  
Lilja Kristinsdóttir ◽  
Javed Hussain ◽  
Anna L. Garden ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Nano Particles ◽  
H2 Formation
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