Harvest of Cu NP anchored magnetic carbon materials from Fe/Cu preloaded biomass: their pyrolysis, characterization, and catalytic activity on aqueous reduction of 4-nitrophenol

2014 ◽  
Vol 16 (9) ◽  
pp. 4198 ◽  
Author(s):  
Wu-Jun Liu ◽  
Ke Tian ◽  
Hong Jiang ◽  
Han-Qing Yu
Keyword(s):  
Catalytic Activity ◽  
Carbon Materials ◽  
Magnetic Carbon

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.

How does the Support Influence the Catalytic Activity of the Keggin Ion?

1996 ◽  
Vol 454 ◽  
Author(s):  
Zakiyyah Smith ◽  
Michael Palmieri ◽  
Nancy Buecheler ◽  
Susan A. Jansen
Keyword(s):  
Catalytic Activity ◽  
Carbon Materials ◽  
Solid Acid ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Heteropoly Acids ◽  
Keggin Ion ◽  
Oxide Substrates ◽  
Silica Matrices

AbstractHeteropoly acids, HPA are well known solid acid and oxidation catalysts that find application in hetergeneous and homogeneous reactions. In the former, surface area and stability problems are diminshed by supporting the HPA. Typical supports include oxide substrates and porous carbon materials. The HPA's show some instability on these supports however. In this work, we demonstrate that HPA encapsulated in sol-gel silica matrices show enhanced catalytic performance without compromising the catalytic activity of the HPA. In addition, the specific role of the support in the catalytic process is described as well.

Production of Magnetic Carbon Materials during Decomposition of Iron Salts Deposited on a Porous Carbon Matrix

2021 ◽  
Vol 94 (4) ◽  
pp. 486-490
Author(s):  
A. V. Kalenskii ◽  
A. A. Zvekov ◽  
A. N. Popova ◽  
V. A. Anan’ev ◽  
O. V. Grishaeva
Keyword(s):  
Porous Carbon ◽  
Carbon Materials ◽  
Carbon Matrix ◽  
Iron Salts ◽  
Magnetic Carbon

Upcycle waste plastics to magnetic carbon materials for dye adsorption from polluted water

RSC Advances ◽  
2014 ◽  
Vol 4 (51) ◽  
pp. 26817 ◽  
Author(s):  
Jingdong Feng ◽  
Jiang Gong ◽  
Xin Wen ◽  
Nana Tian ◽  
Xuecheng Chen ◽  
...  
Keyword(s):  
Carbon Materials ◽  
Dye Adsorption ◽  
Polluted Water ◽  
Waste Plastics ◽  
Magnetic Carbon

Bio-Inspired Magnetic Carbon Materials

2012 ◽  
Author(s):  
Elby Titus ◽  
José Gracio ◽  
Duncan P. Fagg ◽  
Manjo K. Singh ◽  
Antonio C. M. Sousa
Keyword(s):  
Carbon Materials ◽  
Magnetic Carbon

scholarly journals Copper on carbon materials: stabilization by nitrogen doping

2017 ◽  
Vol 5 (21) ◽  
pp. 10574-10583 ◽  
Author(s):  
Dmitri A. Bulushev ◽  
Andrey L. Chuvilin ◽  
Vladimir I. Sobolev ◽  
Svetlana G. Stolyarova ◽  
Yury V. Shubin ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Formic Acid ◽  
Nitrogen Doping ◽  
Carbon Materials ◽  
Carbon Support ◽  
High Catalytic Activity ◽  
N Doping

N-doping of carbon support prevents sintering of Cu and provides its high catalytic activity in H2 formation from formic acid.

Rhenium and manganese modified activated carbon as catalyst for methanol decomposition

2007 ◽  
Vol 85 (2) ◽  
pp. 118-123 ◽  
Author(s):  
T Tsoncheva ◽  
S Vankova ◽  
O Bozhkov ◽  
D Mehandjiev
Keyword(s):  
Catalytic Activity ◽  
Activated Carbon ◽  
Carbon Materials ◽  
Catalytic Properties ◽  
Methanol Decomposition ◽  
Complex Character ◽  
Active Centre ◽  
Modified Activated Carbon

Bicomponent manganese and rhenium modified activated carbon materials, prepared by different methods, are studied and compared with the corresponding monocomponent materials as catalysts in methanol decomposition to CO and hydrogen. The best catalytic activity and stability is observed for the sample obtained by simultaneous deposition of Mn and Re precursors. The complex character of the catalytic active centre, including manganese and rhenium irons in various oxidative states, is discussed. The determining role of the Mn(II) ions in the improvement of the catalytic properties is assumed.Key words: rhenium, manganese, activated carbon, methanol decomposition.

Enhanced Catalytic Activity of Cobalt Porphyrin in CO2 Electroreduction upon Immobilization on Carbon Materials

2017 ◽  
Vol 129 (23) ◽  
pp. 6568-6572 ◽  
Author(s):  
Xin-Ming Hu ◽  
Magnus H. Rønne ◽  
Steen U. Pedersen ◽  
Troels Skrydstrup ◽  
Kim Daasbjerg
Keyword(s):  
Catalytic Activity ◽  
Carbon Materials ◽  
Cobalt Porphyrin ◽  
Co2 Electroreduction
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