scholarly journals Polypyrrole-multi walled carbon nanotube hybrid material supported Pt NPs for hydrogen evolution from the hydrolysis of MeAB at mild conditions

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Yasar Karatas ◽  
Esra Kuyuldar ◽  
Hilal Acidereli ◽  
Mehmet Gulcan ◽  
Fatih Sen
Keyword(s):  
Activation Energy ◽  
Carbon Nanotube ◽  
Hybrid Material ◽  
Reaction Rate ◽  
Pt Nanoparticles ◽  
Catalytic Hydrolysis ◽  
Mild Conditions ◽  
Multi Walled Carbon Nanotube ◽  
Hydrolysis Of ◽  
Very High

AbstractHerein, we report a facile method for the preparation of polypyrrole-multi walled carbon nanotube hybrid material including Pt nanoparticles (Pt@PPy-MWCNT NPs) and the use in methylamine borane (MeAB) for hydrolysis reaction at mild conditions. The prepared catalyst of Pt@PPy-MWCNT NPs was characterized by some advanced analytical methods. The catalytic experiments showed the Pt@PPy-MWCNT NPs can catalyze MeAB in aquatic solution with high catalytical performance at mild conditions. The reaction rate of catalytic hydrolysis with Pt@PPy-MWCNT NPs was found to be -d[CH3NH2BH3]/dt = + d[H2]/3dt = kobs[Pt@PPy-MWCNT]1.19 [MeAB]0.88. The TOF value for the hydrolysis of MeAB catalyzed with Pt@PPy-MWCNT NPs was detected to be 10234.2 1/h (170.57 1/min) which is very high compared with TOF values found for other catalysts. Enthalpy, entropy and activation energy for the hydrolysis of MeAB were calculated to be 31.57 kJ mol−1, −119.97 J mol−1 K and 34.27 kJ mol−1, respectively.

Self-assembly fabrication of a graphene/multi-walled carbon nanotube hybrid material for suppressing potential heat radiation and toxic effluent

RSC Advances ◽  
2015 ◽  
Vol 5 (125) ◽  
pp. 103365-103372 ◽  
Author(s):  
Lei Liu ◽  
Dong Wang ◽  
Yuan Hu
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Graphene Oxide ◽  
Carbon Nanotube ◽  
Hybrid Material ◽  
Self Assembly ◽  
Heat Radiation ◽  
Multi Walled Carbon Nanotube ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Negative graphene oxide was combined with positive chitosan-modified multi-walled carbon nanotubes in aqueous solution and then thermally reduced to fabricate a multi-walled carbon nanotube/graphene (MWCNT/G) hybrid material.

Hydrolysis of PNPP Catalyzed by the Dodecyliminodiacetate Nickel(II) Complexes

2013 ◽  
Vol 634-638 ◽  
pp. 531-535
Author(s):  
Shen Xin Li ◽  
Wei Hu ◽  
Jian Zhang Li
Keyword(s):  
Activation Energy ◽  
Kinetic Parameter ◽  
Absorption Spectra ◽  
Catalytic Hydrolysis ◽  
Specific Absorption ◽  
Carboxylic Ester ◽  
Reaction Systems ◽  
Hydrolytic Reaction ◽  
Hydrolysis Of

One novel dodecyliminodiacetate nickel(II) complexes were synthesized and characterized, and these complexes were used as mimic hydrolytic in catalytic hydrolysis of carboxylic ester (PNPP, p-nitrophenyl picolinate). The analysis of specific absorption spectra of the hydrolytic reaction systems indicated that the catalytic hydrolysis involved the key intermediates formed by PNPP with nickel(II) complexes. The kinetic parameter of PNPP catalytic hydrolysis has been calculated and the activation energy for the catalytic hydrolysis is 1.174 kJ•mol-1.

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