02379nas a2200265 4500008004100000022001400041245008500055210006900140260009500209300001000304490000800314520144900322653002001771653002301791653001501814653001401829653001101843653001901854100002501873700003001898700002201928700002101950700002601971856011601997 2007 eng d a0006-291X00aAll-solid-state' electrochemistry of a protein-confined polymer electrolyte film0 aAllsolidstate electrochemistry of a proteinconfined polymer elec a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcDEC a86-910 v3643 a

Interfacial redox behavior of a heme protein (hemoglobin) confined in a solid polymer electrolyte membrane, Nafion (a perfluoro sulfonic acid ionomer) is investigated using a unique `all-solid-state' electrochemical methodology. The supple phase-separated structure of the polymer electrolyte membrane, with hydrophilic pools containing solvated protons and water molecules, is found to preserve the incorporated protein in its active form even in the solid-state, using UV-visible, Fluorescence (of Tryptophan and Tyrosine residues) and DRIFT (diffuse reflectance infrared Fourier transform) spectroscopy. More specifically, solid-state cyclic voltammetry and electrochemical impedance of the protein-incorporated polymer films reveal that the Fe2+-form of the entrapped protein is found to bind molecular oxygen more strongly than the native protein. In the `all-solid-state' methodology, as there is no need to dip the protein-modified electrode in a liquid electrolyte (like the conventional electrochemical methods), it offers an easier means to study a number of proteins in a variety of polymer matrices (even biomimetic assemblies). In addition, the results of the present investigation could find interesting application in a variety of research disciplines, in addition to its fundamental scientific interest, including protein biotechnology, pharmaceutical and biomimetic chemistry. (C) 2007 Elsevier Inc. All rights reserved.

10aall-solid-state10acyclic voltammetry10ahemoglobin10aImpedance10aNafion10aredox behavior1 aParthasarathy, Meera1 aPillai, Vijayamohanan, K.1 aMulla, Imtiaz, S.1 aShabab, Mohammed1 aKhan, Mohammad, Islam uhttps://library.ncl.res.in/content/all-solid-state-electrochemistry-protein-confined-polymer-electrolyte-film-001755nas a2200277 4500008004100000022001400041245008700055210006900142260006900211300001200280490000800292520084600300653001301146653001401159653001801173653001201191653001501203653001101218100001801229700002401247700002001271700001901291700002501310700002501335856011701360 2014 eng d a0925-400500aEvaluation of n-type ternary metal oxide NiMn2O4 nanomaterial for humidity sensing0 aEvaluation of ntype ternary metal oxide NiMn2O4 nanomaterial for aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcFEB a837-8430 v1913 a

Synthesis of mono-dispersed oleic acid (OA) capped NiMn2O4 (NMO) nanoparticles and their use for humidity sensing is reported. Oleic acid capped NMO (NMO-cOA) nanoparticles are synthesized from nickel oleate and manganese oleate complex. NiMn2O4 is obtained by removing oleic acid capping at 500 degrees C in air. X-ray diffraction analysis shows formation of pure NiMn2O4 phase which is also confirmed by HRTEM-SAED analysis. The TEM analysis also shows that the nanoparticles are nearly mono-dispersed. Doctor bladed films of NMO nanoparticles are seen to exhibit excellent humidity sensing property. The resistivity is seen to change by two orders with humidity change from 11% RH to 92% RH with fairly good linearity over the entire range. The response and recovery times are also fast. (C) 2013 Elsevier B.V. All rights reserved.

10aHumidity10aImpedance10aNanoparticles10aNiMn2O410aOleic acid10aSensor1 aGawli, Yogesh1 aBadadhe, Satish, S.1 aBasu, Aniruddha1 aGuin, Debanjan1 aShelke, Manjusha, V.1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/evaluation-n-type-ternary-metal-oxide-nimn2o4-nanomaterial-humidity-sensing-002608nas a2200253 4500008004100000022001400041245013800055210006900193260000900262300001100271490000800282520169600290653001901986653002502005653001602030653001402046653002802060100002902088700002902117700002702146700002902173700002602202856012602228 2022 eng d a0927-775700aFree base phthalocyanine coating as a superior corrosion inhibitor for copper surfaces: a combined experimental and theoretical study0 aFree base phthalocyanine coating as a superior corrosion inhibit cSEP  a1291380 v6483 a

In the quest of novel, eco-benign copper corrosion inhibitors, free base and a set of six metal Phthalocyanine (Pc) coatings (where metal is Zn, Cu, Fe, Co, Ni, Mn) are systematically evaluated for their corrosion inhibition efficiency. The study demonstrates that the free base Phthalocyanine coatings are superior corrosion inhibitors for Cu surface in HCl with a corrosion inhibition efficiency of 88% as compared to its metal counterparts. A detailed and indepth study involving concerted electrochemical polarisation, impedance measurements at various concentrations of HCl assert the superior corrosion inhibition efficiency of free base Pc coatings as compared to its metal counterparts. Underlying factors/interface chemistry contributing to it is brought out using first principle based studies. First principles based computational studies establish that superior corrosion inhibition ability of free base phthalocyanine molecule is attributed to its innate binding ability with copper surface and its better inter-molecular packing. Thus, the theoretical adsorption trends of various studied phthalocyanine molecules while clearly following the experimental corrosion inhibition efficiency trends undermine the importance of contribution of chelating factors for the formation of a stable and efficient corrosion inhibition coating on a surface and that the adhesion/adsorption strength of a molecule correlates directly to its corrosion inhibition efficiency. The experimental observations are further substantiated through FE-SEM, EDAX and XPS studies. The corrosion inhibition efficiency of free base phthalocyanine is followed by its zinc based counterpart at 85%.

10aCopper surface10aCorrosion inhibitors10aDFT studies10aImpedance10aPhthalocyanine coatings1 aSamal, Pragnya, Paramita1 aDekshinamoorthy, Amuthan1 aArunachalam, Shivakami1 aVijayaraghavan, Saranyan1 aKrishnamurty, Sailaja uhttps://library.ncl.res.in/content/free-base-phthalocyanine-coating-superior-corrosion-inhibitor-copper-surfaces-combined02471nas a2200301 4500008004100000022001400041245011900055210006900174260000800243300001600251490000700267520146700274653001401741653003601755653001801791653000801809653001801817100002501835700002201860700002001882700002201902700001501924700002801939700002501967700002001992700002902012856012802041 2022 eng d a1944-824400aImprovement in oxygen evolution performance of NiFe layered double hydroxide grown in the presence of 1T-Rich MoS20 aImprovement in oxygen evolution performance of NiFe layered doub cJUL a31951-319610 v143 a

NiFe layered double hydroxide (NiFe LDH) grown in the presence of MoS2 (rich in 1T phase) shows exceptional performance metrics for alkaline oxygen evolution reaction (OER) in this class of composites. The as-prepared NiFe LDH/MoS2 composite (abbreviated as MNF) exhibits a low overpotential (eta(10)) of 190 mV; a low Tafel slope of 31 mV dec(-1); and more importantly, a high stability in its performance manifested by the delivery of current output for 45 h. It is important to note that this could be achieved with an exceedingly low loading of 0.14 mg cm(-2). The mass activity of this composite (97 A g(-1)) is about 14 times greater than that of the conventional RuO2 (7 A g(-1) ) at eta = 200 mV. When normalized with respect to the total metal content, a mass activity of 1000 A g(-1) (eta = 300 mV) was achieved. Impedance analysis further reveals that the significant reduction in charge-transfer resistance and hence high current density (5 times greater as compared to NiFe LDH at eta = 300 mV) observed for MNF is associated with interfacial adsorption kinetics of intermediates (R-1). Significant enhancement in the intrinsic activity of MNF over LDH has been observed through normalization of current with the electrochemically active surface area. Computational studies suggest that the Ni centers in the composite act as the active sites for OER, which is well-corroborated with the observed postreaction appearance of Ni3+ species.

10aImpedance10aLDH-MoS2 hybrid electrocatalyst10amass activity10aOER10aoverpotential1 aChakraborty, Soumita1 aMarappa, Shivanna1 aAgarwal, Sakshi1 aBagchi, Debabrata1 aRao, Ankit1 aVinod, Chathakudath, P.1 aPeter, Sebastian, C.1 aSingh, Abhishek1 aEswaramoorthy, Muthusamy uhttps://library.ncl.res.in/content/improvement-oxygen-evolution-performance-nife-layered-double-hydroxide-grown-presence-1t