02019nas a2200205 4500008004100000022001400041245011400055210006900169260008600238300001400324490000700338520118600345653001801531653003001549653003001579653002301609653002901632100002301661856012901684 2009 eng d a0149-639500aStudies on carbonate ion transport through supported liquid membrane using primene JMT and tributyl phosphate0 aStudies on carbonate ion transport through supported liquid memb a325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USAbTAYLOR & FRANCIS INCcAUG a2626-26440 v443 a

A supported liquid membrane system consisting of source, receiving and membrane phases, in which mixed extractants were used in the membrane phase, was explored for the carbonate ion transport from source to receiving through membrane phase. Primary amine Primene JMT and TBP were used as extractants (carriers) in liquid membrane phase. Different experimental variables such as concentration of carbonate ion, carriers, alkali and hydrogen peroxide, stirring speed, etc have been investigated. Primary amine Primene JMT and TBP mixed carriers show the synergistic effect for the transport of carbonate ions through supported liquid membrane system. The stability of the supported liquid membrane system has been explored for 50 h. The pre-concentration of carbonate ions from dilute solutions were also demonstrated. The effect of different alkalis on the permeability coefficient of transport of carbonate ions through supported liquid membrane system has been investigated. The primary amine in combination with TBP shows more effective for the transport of carbonate ions through supported liquid membrane system in comparison with that of secondary and tertiary amines.

10acarbonate ion10aprimary amine primene JMT10asupported liquid membrane10asynergistic effect10atributyl phosphate (TBP)1 aGaikwad, Abaji, G. uhttps://library.ncl.res.in/content/studies-carbonate-ion-transport-through-supported-liquid-membrane-using-primene-jmt-and-002799nas a2200253 4500008004100000022001400041245015200055210006900207260007100276300001400347490000600361520184700367653002102214653002002235653001002255653002802265653002102293653002302314100001602337700001502353700003002368700001502398856013202413 2014 eng d a1944-824400aFacile single-step synthesis of nitrogen-doped reduced graphene oxide-Mn3O4 hybrid functional material for the electrocatalytic reduction of oxygen0 aFacile singlestep synthesis of nitrogendoped reduced graphene ox a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcFEB a2692-26990 v63 a

Development of efficient electrocatalyst based on non-precious metal that favors the four-electron pathway for the reduction of oxygen in alkaline fuel cell is a challenging task. Herein, we demonstrate a new facile route for the synthesis of hybrid functional electrocatalyst based on nitrogen-doped reduced graphene oxide (N-rGO) and Mn3O4 with pronounced electrocatalytic activity towards oxygen reduction reaction (ORR) in alkaline solution. The synthesis involves one-step in situ reduction of both graphene oxide (GO) and Mn(VII), growth of Mn3O4 nanocrystals and nitrogen doping onto the carbon framework using a single reducing agent, hydrazine. The X-ray photoelectron (XPS), Raman and FTIR spectral, and X-ray diffraction measurements confirm the reduction of GO and growth of nanosized Mn3O4. The XPS profile reveals that N-rGO has pyridinic (40%), pyrrolic (53%), and pyridine N oxide (7%) types of nitrogen. The Mn3O4 nanoparticles are single crystalline and randomly distributed over the wrinkled N-rGO sheets. The hybrid material has excellent ORR activity and it favors the 4-electron pathway for the reduction of oxygen. The electrocatalytic performance of the hybrid catalyst is superior to the N-rGO, free Mn3O4 and their physical mixture. The hybrid material shows an onset potential of -0.075 V, which is 60-225 mV less negative than that of the other catalyst tested. It has excellent methanol tolerance and high durability. The catalytic current density achieved with the hybrid material at 0.1 mg cm(-2) is almost equivalent to that of the commercial Pt/C (10%). The synergistic effect of N-rGO and Mn3O4 enhances the overall performance of the hybrid catalyst. The nitrogen in N-rGO is considered to be at the interface to bridge the rGO framework and Mn3O4 nanoparticles and facilitates the electron transfer.

10aelectrocatalysis10ahybrid material10aMn3O410anitrogen-doped graphene10aoxygen reduction10asynergistic effect1 aBag, Sourav1 aRoy, Kanak1 aGopinath, Chinnakonda, S.1 aRaj, Retna uhttps://library.ncl.res.in/content/facile-single-step-synthesis-nitrogen-doped-reduced-graphene-oxide-mn3o4-hybrid-functional-003203nas a2200265 4500008004100000022001400041245017200055210006900227260000800296300001400304490000700318520224200325653002802567653001302595653001902608653002002627653002302647100001902670700002302689700001802712700002102730700002902751700002602780856013102806 2020 eng d a2155-543500aControlling and stabilization of Ru nanoparticles by tuning the nitrogen content of the support for enhanced H-2 production through aqueous-phase reforming of glycerol0 aControlling and stabilization of Ru nanoparticles by tuning the  cFEB a2489-25070 v103 a

The stable activity of catalysts is an important issue in catalysis, particularly aqueous-phase reforming (APR) of renewable oxygenates, of biomass origin, to get H-2. Sintering of metal nanoparticles on supports affects catalyst stability. To alleviate this problem, a series of highly stable Ru-supported catalysts with controlled metal nanoparticle sizes have been prepared via the easy incipient wetness impregnation method. These catalysts were used for APR of glycerol to produce H-2. Nitrogen-doped mesoporous carbons (NMCs) were utlized as supports and found to have a strong influence on the catalytic performance of the catalysts. Incorporation of nitrogen in the carbon framework significantly enhanced the catalytic activity compared to Ru catalysts on nitrogen-free supports. Notably, the catalyst (5 wt % Ru-NMC-3) with optimal N content (10.9 wt %) demonstrated improved stability and H-2 selectivity, which are better than those of many state-of-the-art catalysts. Nitrogen in the carbon framework has a dual relationship with the activity of the catalyst: (i) it creates basic environment over the catalysts support and (ii) it acts as an anchoring site for metal nanoparticles. Anchoring of metal nanoparticles has helped to curb their sintering, thus leading to better stability of the catalysts under APR reaction conditions. Various characterization techniques were employed to understand the nature of active catalytic sites responsible for higher H-2 production while minimizing CO formation. In situ CO-FTIR studies showed that the higher catalytic activity of 5 wt % Ru-NMC-3 catalyst was attributed to the enhanced WGS activity over this catalyst. Density functional theory calculations were performed to understand the stabilization of metal nanoparticles by different types of N present on the support and provide insights into the prefered sites of glycerol adsorption on the NMC support. Since S wt % Ru-NMC-3 was the relatively best catalyst, it was selected for the preparation of bimetallic catalysts. Accordingly, addition of Pt to this system helped to increase the stability of the catalyst. This bimetallic catalyst may, therefore, find application for wide use in APR of biomass oxygenates.

10aaqueous-phase reforming10aGlycerol10aH-2 production10aRu/NMC catalyst10asynergistic effect1 aGogoi, Pranjal1 aKanna, Narsimharao1 aBegum, Pakiza1 aDeka, Ramesh, C.1 aSatyanarayana, C., V. V.1 aRaja, Thirumalaiswamy uhttps://library.ncl.res.in/content/controlling-and-stabilization-ru-nanoparticles-tuning-nitrogen-content-support-enhanced-h-202535nas a2200277 4500008004100000245020600041210006900247260000800316300001200324490000600336520152200342653001501864653002501879653001901904653002101923653002301944653002001967100002901987700002202016700001902038700001802057700002502075700001902100700001902119856011902138 2022 eng d00aHigh-alkaline water-splitting activity of mesoporous 3D heterostructures: an amorphous-shell@crystalline-core nano-assembly of Co-Ni-phosphate ultrathin-nanosheets and V- doped cobalt-nitride nanowires0 aHighalkaline watersplitting activity of mesoporous 3D heterostru cAUG a22013110 v93 a

Introducing amorphous and ultrathin nanosheets of transition bimetal phosphate arrays that are highly active in the oxygen evolution reaction (OER) as shells over an electronically modulated crystalline core with low hydrogen absorption energy for an excellent hydrogen evolution reaction (HER) can boost the sluggish kinetics of the OER and HER in alkaline electrolytes. Therefore, in this study, ultrathin and amorphous cobalt-nickel-phosphate (CoNiPOx) nanosheet arrays are deposited over vanadium (V)-doped cobalt-nitride (V-3%-Co4N) crystalline core nanowires to obtain amorphous-shell@crystalline-core mesoporous 3D-heterostructures (CoNiPOx@V-Co4N/NF) as bifunctional electrocatalysts. The optimized electrocatalyst shows extremely low HER and OER overpotentials of 53 and 270 mV at 10 mA cm(-2), respectively. The CoNiPOx@V-3%-Co4N/NF (+/-) electrolyzer utilizing the electrocatalyst as both anode and cathode demonstrates remarkable overall water-splitting activity, requiring a cell potential of only 1.52 V at 10 mA cm(-2), 30 mV lower than that of the RuO2/NF (+)/20%-Pt/C/NF (-) electrolyzer. Such impressive bifunctional activities can be attributed to abundant active sites, adjusted electronic structure, lower charge-transfer resistance, enhanced electrochemically active surface area (ECSA), and surface- and volume-confined electrocatalysis resulting from the synergistic effects of the crystalline V-3%-Co4N core and amorphous CoNiPOx shells boosting water splitting in alkaline media.

10acore-shell10ahydrogen productions10ametal nitrides10ametal phosphates10asynergistic effect10awater-splitting1 aSingh, Thangjam, Ibomcha1 aMaibam, Ashakiran1 aCha, Dun, Chan1 aYoo, Sunghoon1 aBabaRao, Ravichandar1 aLee, Sang, Uck1 aLee, Seunghyun uhttps://library.ncl.res.in/content/high-alkaline-water-splitting-activity-mesoporous-3d-heterostructures-amorphous02336nas a2200277 4500008004100000022001400041245011600055210006900171260000800240300001600248490000700264520140800271653002001679653002401699653001801723653002301741653000801764100002101772700002701793700002601820700001901846700002201865700001701887700002801904856012601932 2022 eng d a0272-884200aRu, Pd doped WO3 nanomaterials: a synergistic effect of noble metals to enhance the acetone response properties0 aRu Pd doped WO3 nanomaterials a synergistic effect of noble meta cJUN a17923-179330 v483 a

Noble metals (NMs) have an enormous impact on the intrinsic properties of the metal oxides. We report the synergistic effect of Ruthenium (Ru) and Palladium (Pd) noble metals on the enhancement of gas sensing properties of pure tungsten oxide (WO3). The gas sensing material is synthesized by simple and straight forward precipitation route, and its physico-chemical analyses are determined using XRD, FESEM, TEM/HRTEM, FFT, UV-Vis, XPS, EDAX, and BET measurements. Use of the developed material as a gas sensor is evaluated using several target gases (oxidizing as well as reducing), with acetone showing the best selectivity. The noble metal doping and hence catalytic action improved the gas response qualities. The synergistic effect of Ru and Pd on WO3 gas response properties are identified, where the effect is 99.80% sensitivity, and lower response/recovery time (10 s and 2 min) at 300 degrees C operating temperature. Nonetheless, the sensors displayed better gas sensing properties even at lower operating temperatures ranging from 200 to 275 degrees C. In addition, the synergistic effect has displayed the dramatic enhancement in the sensitivity to 76.44% at barely 10 ppm acetone concentration. This particular result will undoubtedly be helpful for diagnostic purpose of diabetic patients, and a strong candidate for prospective gas sensing applications, particularly acetone.

10aAcetone vapours10aPrecipitation route10aRu -Pd doping10asynergistic effect10aWO31 aKodam, Pavan, M.1 aGhadage, Pandurang, A.1 aNadargi, Digambar, Y.1 aShinde, K., P.1 aMulla, Imtiaz, S.1 aPark, J., S.1 aSuryavanshi, Sharad, S. uhttps://library.ncl.res.in/content/ru-pd-doped-wo3-nanomaterials-synergistic-effect-noble-metals-enhance-acetone-response02497nas a2200265 4500008004100000022001400041245016000055210006900215260000800284300001500292490000700307520156200314653002301876653001301899653002501912653001801937653002301955100002101978700002201999700002502021700002502046700002502071700001602096856011902112 2025 eng d a2192-650600aSynergistic effect of acidic-basic features of copper-doped layered double hydroxides nanocatalysts in valorization of biomass-derived furfural to biofuels0 aSynergistic effect of acidicbasic features of copperdoped layere cDEC ae2025004160 v903 a

Valorization of biomass-derived chemicals into high-quality compounds and biofuels is enormously fundamental to diminish dependence on fossil-based resources. Furfural is a bio-based valuable compound which can be proficiently upgraded to 4-(2-furyl)-3-buten-2-one (FAc) and 1,4-pentadiene-3-one, 1,5-di-2-furanyl (F 2 Ac) via aldol condensation of furfural with acetone. In the present work, efficient Cu-doped Mg-Al layered double hydroxides (LDH) nanocatalysts are fabricated by coprecipitation and are exploited for furfural conversion to obtained FAc and F 2 Ac. The structure-activity relationship is scrutinized by characterizing fresh and spent nanocatalysts via numerous techniques. The good correlation between the amount of weak acidic-weak basic catalytic sites and nanocatalysts performance is established. The superior performance of Cu-0.1 nanocatalyst (Cu-content = 1.85 wt%) in aldol condensation is attributed to the presence of optimum weak acidic sites (0.21 mmol g-1) and weak basic sites (0.36 mmol g-1), synergistic acidic-basic effect, nano-sized Cu(OH) 2 nanoparticles (1.6 nm), high BET surface area (181 m2 g-1), and mesoporous architecture of material. Cu-0.1 nanocatalyst delivered 98% FAc selectivity with 100% furfural conversion at 85 degrees C. Furthermore, at 100 degrees C, the nanocatalyst gives 55% F 2 Ac selectivity with 73% furfural conversion. The catalyst displays good recyclability (7 recycles) and stability. Plausible mechanistic pathway for transformation of furfural to FAc and F 2 Ac is proposed.

10aAldol condensation10abiofuels10abiomass valorization10ananocatalysis10asynergistic effect1 aGode, Nilesh, G.1 aNagpure, Atul, S.1 aRewatkar, Suresh, B.1 aBhagat, Shailesh, K.1 aDeshmukh, Ganpat, D.1 aSaini, Ajay uhttps://library.ncl.res.in/content/synergistic-effect-acidic-basic-features-copper-doped-layered-double-hydroxides02243nas a2200313 4500008004100000022001400041245015900055210006900214260000800283300001100291490000800302520113800310653002401448653001901472653002301491653002001514653002001534653003501554653002301589100002801612700002601640700002201666700002901688700001801717700002301735700002201758700001801780856013101798 2025 eng d a1385-894700aUnravelling the Cu-Co nanoparticle synergy over Ceria-Zirconia support toward efficient reverse water gas shift (RWGS) conversion under H2 lean conditions0 aUnravelling the CuCo nanoparticle synergy over CeriaZirconia sup cMAR a1607050 v5083 a

CO2 emissions leading to global warming and environmental and socio-economic issues have propelled the research community to develop technologies capable of capturing and converting CO2 into valuable products. Controlling the selectivity toward platform molecules like CO, methanol, or methane is a fundamental challenge in CO2 hydrogenation. Supported cobalt nanoparticles are known for hydrocarbon production through FischerTropsch (FT) reaction, and Cu-based catalysts are known for reverse water gas shift (RWGS) reaction. Here, we show that d-band centre can be carefully modulated by making bimetallic combinations of Cu and Co for a highly active RWGS catalyst. An oxygen vacancy-rich nanostructured ceria-zirconia (CZ) support with Cu nanoparticles (2 wt%) modified with as low as 0.05 wt% Co shows excellent conversion for CO2 hydrogenation and selectivity for CO below 500 degrees C. The optimized catalyst shows CO2 conversion even under hydrogen lean conditions (H2/ CO2 ratio 0.5:1), with a breakthrough rate of 206023 mmol/gmetal/h for CO at 600 degrees C, having H2 utilization of 80% for the RWGS process.

10aBimetallic catalyst10aCeria-zirconia10aCO 2 hydrogenation10aCobalt catalyst10aCopper catalyst10aReverse water gas shift (RWGS)10asynergistic effect1 aJagtap, Anuradha, Vijay1 aBamnia, Mahesh, Kumar1 aMaibam, Ashakiran1 aBajpai, Jyotsna, Paliwal1 aGupta, Sharad1 aThomas, Sharon, K.1 aDabke, Niteen, B.1 aVinod, C., P. uhttps://library.ncl.res.in/content/unravelling-cu-co-nanoparticle-synergy-over-ceria-zirconia-support-toward-efficient-reverse