01729nas a2200205 4500008004100000022001400041245008400055210006900139260007300208300001200281490000800293520097400301653001901275653001701294653002701311100002401338700002801362700002201390856011101412 2012 eng d a0376-738800aPolymeric ionic liquids (PILs): effect of anion variation on their CO2 sorption0 aPolymeric ionic liquids PILs effect of anion variation on their  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcFEB a305-3150 v3893 a

A series of polymeric ionic liquids (PILs) based on poly(diallyldimethylammonium chloride), P[DADMA][Cl] as a precursor was investigated by varying anions categorized into carboxylates, sulphonates and inorganic type. For the exchange of chloride from P[DADMA][Cl] by another anion, silver salt of the corresponding anion was preferred. Obtained PILs were investigated for physical properties which are anticipated to affect gas sorption. PILs possessing carboxylate (especially acetate) anion exhibited attractive CO2 sorption capacity as well as sorption selectivity over H-2 and N-2, in Comparison to Other two Categories. PIL with acetate anion, P[DADMA][Ac] possessed appreciable CO2 sorption coupled with high selectivity (S-CO2/S-N2 = 114.3). This crucial finding from this series of PILs was further substantiated by making PIL based on poly(vinylbenzyltrimethylammonium chloride), P[VBTMA][Cl] as a precursor. (C) 2011 Elsevier B.V. All rights reserved.

10aAnion exchange10aCO2 sorption10aPolymeric ionic liquid1 aBhavsar, Rupesh, S.1 aKumbharkar, Santosh, C.1 aKharul, Ulhas, K. uhttp://library.ncl.res.in/content/polymeric-ionic-liquids-pils-effect-anion-variation-their-co2-sorption-002146nas a2200217 4500008004100000022001400041245014900055210006900204260007300273300001200346490000800358520126700366653001901633653001901652653002201671653003501693100002101728700002601749700002201775856013101797 2016 eng d a0376-738800aPolybenzimidazole based polymeric ionic liquids possessing partial ionic character: effects of anion exchange on their gas permeation properties0 aPolybenzimidazole based polymeric ionic liquids possessing parti aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJAN a282-2880 v4973 a

Polymeric ionic liquids (PILs) are emerging as promising membrane materials for CO2 separation. Present work is in continuation with our earlier efforts on evaluating gas permeation properties (especially, CO2) of film forming PILs based on polybenzimidazoles and efforts towards improving their permeability by structural tuning. This work specifically aims at evaluating effect of anion variation in chosen PILs possessing partial N-quaternization of imidazole moiety of PBI-Bul. Three anions (viz., Tf2N-, BF4- and Ac-) were chosen for the bromide exchange of two PILs, viz., [TBzPBI-Bul][Br](10) and [TBzPBI-Bul][Br](18), possessing degree of PEI N-quaternization (DQ) as 10 and 18%, respectively. Concurrent effects of variation in anion and DQ were analyzed in terms of physical and gas permeation properties of the resulting PILs. All of them possessed amorphous nature, adequate thermal stability ( >= 250 degrees C) and solvent solubility, which are primary requisites towards their applicability as a membrane material. PILs possessing BF4- anion exhibited improved CO2 permeability coefficient as well as its permselectivity over CH4 and N-2, in comparison to their counterparts with other anions. (C) 2015 Elsevier B.V. All rights reserved.

10aAnion exchange10aGas separation10aPolybenzimidazole10aPolymeric ionic liquids (PILs)1 aRewar, Anita, S.1 aShaligram, Sayali, V.1 aKharul, Ulhas, K. uhttp://library.ncl.res.in/content/polybenzimidazole-based-polymeric-ionic-liquids-possessing-partial-ionic-character-effects-102528nas a2200277 4500008004100000022001400041245014800055210006900203260000800272300001600280490000700296520157200303653001901875653002401894653002201918653002901940653001601969653002301985100001702008700002002025700001702045700002302062700001802085700001702103856013002120 2025 eng d a1944-824400aEnhanced electrocatalytic performances of NiCr layered double hydroxides by oxalate intercalation in anion exchange membrane water electrolysis0 aEnhanced electrocatalytic performances of NiCr layered double hy cJUN a37863-378780 v173 a

Layered double hydroxides (LDHs) have attracted much attention these days in the field of water electrolysis due to easy modulation in their layered structure and properties. Herein, NiCr-LDH has been developed, and its interlayer spacing has been considerably increased by oxalate intercalation. Such increased interlayer spacing allows easy access of hydroxides to a large number of electroactive sites and thereby boosts the electrocatalytic performances both for oxygen and hydrogen evolution reactions. Being very active toward both the electrocatalytic reactions, the oxalate-intercalated NiCr-LDH was further explored in an alkaline anion exchange membrane water electrolyzer (AEMWE), achieving 800 mA cm-2 at 1.88 V cell voltage at an operating temperature of 60 degrees C. In fact, the electrolyzer efficiency has been determined to be as high as 69.66%, and the calculated H2 production cost was found to be \$0.97 per gasoline-gallon equivalent, which is well below the targeted cost by the Department of Energy, USA. The electrocatalyst was also examined in harsh alkaline media, like highly saline or seawater, which also indicated its ability to carry out sustainable seawater electrolysis, restricting chlorides to a great extent. Interestingly, post-electrolysis characterization reveals the fact that oxalate decomposition aided carbonate formation within interlayers of NiCr-LDH, and high affinity toward hydroxides is responsible for restricting chlorides during the electrolysis process, apart from the great electrocatalytic activity.

10aAnion exchange10ahydrogen production10ainterlayerspacing10aLayered double hydroxide10aSustainable10awater electrolyzer1 aPal, Santanu1 aSinha, Nibedita1 aDas, Chandni1 aChauhan, Inderjeet1 aAhmed, Tanbir1 aRoy, Poulomi uhttp://library.ncl.res.in/content/enhanced-electrocatalytic-performances-nicr-layered-double-hydroxides-oxalate-intercalation