Institution
National Chemical Laboratory
Facility•Pune, Maharashtra, India•
About: National Chemical Laboratory is a facility organization based out in Pune, Maharashtra, India. It is known for research contribution in the topics: Catalysis & Enantioselective synthesis. The organization has 8891 authors who have published 14837 publications receiving 387600 citations.
Topics: Catalysis, Enantioselective synthesis, Nanoparticle, Zeolite, Adsorption
Papers published on a yearly basis
Papers
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TL;DR: In this article, Nanocomposites of starch were prepared via different addition sequences of plasticizer and clay by the solution method and the extent of dispersion of the filler was evaluated by wide angle X-ray diffractometry in the resulting composites.
Abstract: Nanocomposites of starch were prepared via different addition sequences of plasticizer and clay by the solution method. The extent of dispersion of the filler was evaluated by wide angle X-ray diffractometry (WAXD) in the resulting composites. Thermal stability, mechanical properties and water absorption studies were conducted to measure the material properties whereas FT-IR spectroscopy was used to study the microdomain structure of composites. The sequence of addition of components (starch /plasticizer (glycerol) / clay) had a significant effect on the nature of composites formed and accordingly properties were altered. Glycerol and starch both have the tendency to penetrate into the silicate layers but penetration of glycerol is favored owing to its smaller molecule size. The filler dispersion becomes highly heterogeneous and the product becomes more brittle when starch was plasticized before filling with clay due to the formation of a bulky structure resulting from electrostatic attractions between starch and plasticizer. It was concluded that best mechanical properties can be obtained if plasticizer is added after mixing of clay in the starch matrix.
163 citations
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TL;DR: In this paper, a systematic study on catalytic methylation of phenol is carried out with methanol as a function of reaction temperature and catalyst composition on a Cu 1− x Co x Fe 2 O 4 (x = 0.0 to 1.0) ferrospinel system.
162 citations
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TL;DR: In this article, the authors investigated the kinetics of catalytic hydrogenation of nitrobenzene in acid medium to p-aminophenol in a batch slurry reactor in a temperature range of 323-353 K.
161 citations
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TL;DR: In this article, fine particles of cobalt ferrite were synthesized by the sol?gel method and X-ray diffraction studies were carried out to elucidate the structure of all the samples.
Abstract: Fine particles of cobalt ferrite were synthesized by the sol?gel method. Subsequent heat treatment at different temperatures yielded cobalt ferrites having different grain sizes. X-ray diffraction studies were carried out to elucidate the structure of all the samples. Dielectric permittivity and ac conductivity of all the samples were evaluated as a function of frequency, temperature and grain size. The variation of permittivity and ac conductivity with frequency reveals that the dispersion is due to Maxwell?Wagner type interfacial polarization in general, with a noted variation from the expected behaviour for the cold synthesized samples. High permittivity and conductivity for small grains were explained on the basis of the correlated barrier-hopping model.
161 citations
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TL;DR: In this paper, a composite of Ni3N nanoparticles on a benzimidazole COF for oxygen evolution reaction was shown to have a near-record low overpotential of 230 mV @ 10 mA cm−2 (η 10), attributed to the ability of the COF to confine the Ni3Ns nanoparticles to size regimes otherwise difficult to obtain and to its low band gap character.
Abstract: Covalent organic frameworks (COFs) have structures and morphologies closely resembling graphenes, whose modular construction permits atomic-level manipulations. This, combined with their porous structure, makes them excellent catalyst supports. Here, the high electrocatalytic activity of a composite, formed by supporting Ni3N nanoparticles on a benzimidazole COF, for oxygen evolution reaction is shown. The composite oxidizes alkaline water with a near-record low overpotential of 230 mV @ 10 mA cm−2 (η 10). This high activity is attributed to the ability of the COF to confine the Ni3N nanoparticles to size regimes otherwise difficult to obtain and to its low band gap character (1.49 eV) arising from the synergy between the conducting Ni3N nanoparticles and the π-conjugated COF. The COF itself, as a metal-free self-standing framework, has an oxygen evolution reaction activity with η 10 of 400 mV. The periodic structure of the COF makes it serve as a matrix to disperse the catalytically active Ni3N nanoparticles favoring their high accessibility and thereby good charge-transport within the composite. This is evident from the amount of O2 evolved (230 mmol h−1 g−1), which, to the best of our knowledge, is the highest reported. The work reveals the emergence of COF as supports for electrocatalysts.
161 citations
Authors
Showing all 8913 results
Name | H-index | Papers | Citations |
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Ashok Kumar | 151 | 5654 | 164086 |
Rajesh Kumar | 149 | 4439 | 140830 |
Tak W. Mak | 148 | 807 | 94871 |
John T. O'Brien | 121 | 819 | 63242 |
Clive Ballard | 117 | 736 | 61663 |
Yoshinori Tokura | 117 | 858 | 70258 |
John S. Mattick | 116 | 367 | 64315 |
Michael Dean | 107 | 419 | 63335 |
Ian G. McKeith | 107 | 468 | 51954 |
David J. Burn | 100 | 446 | 39120 |
Anil Kumar | 99 | 2124 | 64825 |
Vikas Kumar | 89 | 859 | 39185 |
Detlef W. Bahnemann | 88 | 517 | 48826 |
Gautam R. Desiraju | 88 | 458 | 45301 |
Praveen Kumar | 88 | 1339 | 35718 |