01754nas a2200181 4500008004100000022001400041245014100055210006900196260000800265300001200273490000700285520106100292100001701353700002001370700002501390700003101415856012601446 2018 eng d a1144-054600aPreparation of metal oxide supported catalysts and their utilization for understanding the effect of a support on the catalytic activity0 aPreparation of metal oxide supported catalysts and their utiliza cJAN a402-4100 v423 a

A convenient way of anchoring transition metal nanoparticles (palladium, platinum, rhodium and ruthenium) onto metal oxide supports (magnesium oxide and zirconium oxide) by means of a modified sol-gel technique is demonstrated. Use of toluene dispersed, ligand protected pre-synthesized nanoparticles during sol-gel synthesis delivered size-controlled, spatially distributed, well-adhered transition metal nanoparticles (MNPs) on metal oxide supports. The catalytic activities of these supported nanoparticles were tested for the p-nitro phenol reduction reaction. It was observed that the reaction kinetics were crucially dependent on the catalyst support and MNP size. The influence of the magnesium oxide and zirconium oxide supports towards the catalytic performance of the anchored transition MNPs was probed using cyclic voltammetry and the differences in the same were attributed to the support-induced modification in the electronic properties of the MNPs. Our results indicated that magnesium oxide is a better support than zirconium oxide.

1 aSeth, Jhumur1 aDubey, Prashant1 aChaudhari, Vijay, R.1 aPrasad, Bhagavatula, L. V. uhttps://library.ncl.res.in/content/preparation-metal-oxide-supported-catalysts-and-their-utilization-understanding-effect02182nas a2200169 4500008004100000022001400041245013200055210006900187260000900256300001600265490000700281520155000288100001701838700002501855700001601880856011601896 2019 eng d a1463-907600aWater-assisted stability of carbene: cyclic voltammetric investigation of 1-ethyl-3-methylimidazolium ethylsulfate ionic liquid0 aWaterassisted stability of carbene cyclic voltammetric investiga cNOV  a24126-241310 v213 a

In this work, we report electrochemical studies on imidazolium-based ionic liquids with an objective to explore the possibility of carbene formation in their dilute aqueous solutions. Conventionally, water plays a detrimental role during investigations involving ionic liquids, and this role has been investigated via electrochemical studies in aqueous ionic liquid solutions. There are varying opinions regarding the influence of water on the physicochemical behaviour of ionic liquids that require an in-depth understanding. To eludicate the role of water, we attempted to evaluate the electrochemical performance of ionic liquids in water as a solvent, and the influence of water on ionic liquids was explored through feasibility and stability studies on carbene formed in an aqueous imidazolium-based ionic liquid solution. The electrochemical investigation of an aqueous solution of 1-ethyl-3-methylimidazolium ethylsulfate ([EMIM][EtSO4]) revealed a redox couple. Detailed investigations suggest that reduction of the imidazolium cation occurs at the C2 position, with subsequent formation of carbene. Furthermore, an anodic peak was found to be associated with the oxidation of carbene. The coulometric process associated with the anodic peaks indicated that the two-electron oxidation of carbene occurred. The stability of carbene in water was evaluated through the use of different protic and aprotic solvents. The hydrogen bond-forming ability of carbene with water seems to be responsible for its improved stability in water.

1 aJain, Preeti1 aChaudhari, Vijay, R.1 aKumar, Anil uhttps://library.ncl.res.in/content/water-assisted-stability-carbene-cyclic-voltammetric-investigation-1-ethyl-301319nas a2200229 4500008004100000022001400041245015400055210006900209260000800278300001200286490000600298520046800304653002000772653002300792653002100815653002400836653002300860100002500883700002500908700003100933856012500964 2020 eng d a2194-428800aMechanistic aspects of methanol electro-oxidation reaction through cyclic voltammetry: is it correct to blame carbon monoxide for catalyst poisoning?0 aMechanistic aspects of methanol electrooxidation reaction throug cMAY a19009550 v83 a

The mechanism of the methanol oxidation reaction is revisited using systematic cyclic voltammetric studies. These studies clearly indicate that the peak during the cathodic scan belongs mainly to electro-oxidation of the carbon monoxide, and that only a fraction of this carbon monoxide remains adsorbed on the electrode, contrary to what previous reports suggested. More details can be found in article number by Bhagavatula L. V. Prasad and co-workers.

10acarbon monoxide10acyclic voltammetry10aelectrocatalysts10aelectrode poisoning10aMethanol oxidation1 aDeshpande, Pooja, S.1 aChaudhari, Vijay, R.1 aPrasad, Bhagavatula, L. V. uhttps://library.ncl.res.in/content/mechanistic-aspects-methanol-electro-oxidation-reaction-through-cyclic-voltammetry-it