01991nas a2200253 4500008004100000022001400041245010500055210006900160260006900229300001000298490000800308520107500316653002101391653001501412653002801427653001801455653002801473653001601501100002501517700002101542700002001563700003001583856012401613 2009 eng d a1572-665700aY-junction nanostructures of palladium: enhanced electrocatalytic properties for fuel cell reactions0 aYjunction nanostructures of palladium enhanced electrocatalytic  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcMAR a58-620 v6273 a

Here we demonstrate the utility of hierarchically designed alumina templates for the formation of palladium Y-junction nanostructures through a chemical vapor deposition route. These structures exhibit enhanced electrocatalytic activity for the oxidation of formic acid (up to 1020%) compared to that of platinum Y-junction nanostructures, which could be of immense relevance to portable fuel cell technology, since designing a better electrocatalyst for fuel cell reactions continues to be an important challenge. Apart from the obvious applications in fuel cell electrocatalysis, these Y-junction nanostructures could also act as promising candidates for room temperature hydrogen separation and more importantly as interconnects in molecular scale electronic devices. The present method of fabrication of Y-junction nanostructures using hierarchical alumina templates could be extended to other metallic/semiconducting systems facilitating more general opportunities for such hierarchical designs in nanoelectronics. (C) 2008 Elsevier B.V. All rights reserved.

10aelectrocatalysts10afuel cells10aHierarchical structures10aNanostructure10aPorous alumina membrane10aY-junctions1 aSubhramannia, Mahima1 aRamaiyan, Kannan1 aAslam, Mohammed1 aPillai, Vijayamohanan, K. uhttps://library.ncl.res.in/content/y-junction-nanostructures-palladium-enhanced-electrocatalytic-properties-fuel-cell-002168nas a2200241 4500008004100000022001400041245014700055210006900202260007700271300001400348490000700362520124400369653002101613653001501634653001301649653002001662653001601682100002501698700002801723700002501751700002401776856012601800 2013 eng d a2192-650600aRedox-mediated synthesis of functionalised graphene: a strategy towards 2D multifunctional electrocatalysts for energy conversion applications0 aRedoxmediated synthesis of functionalised graphene a strategy to aBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcOCT a1296-13030 v783 a

A simple, one-step synthetic route for developing a two-dimensional multifunctional electrocatalyst is reported, by the functionalisation of graphene using oxidised ethylenedioxythiophene (O-EDOT). The mutually assisted redox reaction between graphene oxide (GO) and EDOT facilitates the reduction of GO to graphene with a concomitant deposition of O-EDOT on the surface of the graphene. The oxidised surface of GO catalyses the reaction without using an added reducing agent, so a controlled and uniform deposition of O-EDOT is ensured on the surface of graphene, which essentially prevents the restacking of the layers. UV/Visible, IR, Raman and X-ray photoelectron spectroscopy give valid evidence for the reduction and functionalisation of graphene sheets. The functional groups present on the surface of graphene are found to tune the physical and chemical properties of graphene. Consequently, the functionalised material displays enhanced electrocatalytic activity for the reduction of oxygen to water and I3- to I- relative to pristine graphene. These distinct property characteristics make the material a versatile cathode electrocatalyst for both alkaline anion-exchange membrane fuel cells and dye-sensitised solar cells.

10aelectrocatalysts10afuel cells10agraphene10aredox chemistry10asolar cells1 aUnni, SreeKuttan, M.1 aBhange, Siddheshwar, N.1 aAnothumakkool, Bihag1 aKurungot, Sreekumar uhttps://library.ncl.res.in/content/redox-mediated-synthesis-functionalised-graphene-strategy-towards-2d-multifunctional-001108nas a2200277 4500008004100000022001400041245015900055210006900214260000900283300001400292490000600306520012200312653002100434653002600455653001500481653003000496653002700526100002400553700002000577700001600597700001900613700002200632700002500654700002000679856013100699 2020 eng d a2574-096200aBimetallic palladium nickel nanoparticles anchored on carbon as high-performance electrocatalysts for oxygen reduction and formic acid oxidation reactions0 aBimetallic palladium nickel nanoparticles anchored on carbon as  cSEP  a9285-92950 v33 a

{Herein, we report the synthesis of carbon-supported palladium-nickel electrocatalysts (ECs) (Pd4-xNix/C ECs

10aelectrocatalysts10aFormic Acid Oxidation10afuel cells10aoxygen reduction reaction10apalladium-nickel alloy1 aGoswami, Chiranjita1 aSaikia, Himadri1 aTada, Kohei1 aTanaka, Shingo1 aSudarsanam, Putla1 aBhargava, Suresh, K.1 aBharali, Pankaj uhttps://library.ncl.res.in/content/bimetallic-palladium-nickel-nanoparticles-anchored-carbon-high-performance-electrocatalysts02910nas a2200265 4500008004100000022001400041245014100055210006900196260000900265300001400274490000700288520197300295653001902268653002102287653002302308653002802331653002102359100002702380700002402407700002702431700002102458700001802479700002402497856012302521 2020 eng d a0947-653900aHierarchical nanoflower arrays of Co9S8-Ni3S2 on nickel foam: a highly efficient binder-free electrocatalyst for overall water splitting0 aHierarchical nanoflower arrays of Co9S8Ni3S2 on nickel foam a hi cJUN  a7900-79110 v263 a

Hydrogen production is vital for meeting future energy demands and managing environmental sustainability. Electrolysis of water is considered as the suitable method for H-2 generation in a carbon-free pathway. Herein, the synthesis of highly efficient Co9S8-Ni3S2 based hierarchical nanoflower arrays on nickel foam (NF) is explored through the one-pot hydrothermal method (Co9S8-Ni3S2/NF) for overall water splitting applications. The nanoflower arrays are self-supported on the NF without any binder, possessing the required porosity and structural characteristics. The obtained Co9S8-Ni3S2/NF displays high hydrogen evolution reaction (HER), as well as oxygen evolution reaction (OER), activities in 1 m KOH solution. The overpotentials exhibited by this system at 25 mA cm(-2) are nearly 277 and 102 mV for HER and OER, respectively, in 1 m KOH solution. Subsequently, the overall water splitting was performed in 1 m KOH solution by employing Co9S8-Ni3S2/NF as both the anode and cathode, where the system required only 1.49, 1.60, and 1.69 V to deliver the current densities of 10, 25, and 50 mA cm(-2), respectively. Comparison of the activity of Co9S8-Ni3S2/NF with the state-of-the-art Pt/C and RuO2 coated on NF displays an enhanced performance for Co9S8-Ni3S2/NF both in the half-cell as well as in the full cell, emphasizing the significance of the present work. The post analysis of the material after water electrolysis confirms that the surface Co(OH)(2) formed during the course of the reaction serves as the favorable active sites. Overall, the activity modulation achieved in the present case is attributed to the presence of the open-pore morphology of the as formed nanoflowers of Co9S8-Ni3S2 on NF and the simultaneous presence of the surface Co(OH)(2) along with the highly conducting Co9S8-Ni3S2 core, which facilitates the adsorption of the reactants and subsequently its conversion into the gaseous products during water electrolysis.

10acobalt sulfide10aelectrocatalysts10aHydrogen evolution10aoverall water splitting10aoxygen evolution1 aIllathvalappil, Rajith1 aWalko, Priyanka, S.1 aKanheerampockil, Fayis1 aBhat, Suresh, K.1 aDevi, Nandini1 aKurungot, Sreekumar uhttps://library.ncl.res.in/content/hierarchical-nanoflower-arrays-co9s8-ni3s2-nickel-foam-highly-efficient-binder-free01319nas 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-it02183nas a2200253 4500008004100000022001400041245012000055210006900175260000800244300001200252490000600264520129000270653002101560653001501581653001301596653003001609100002801639700002701667700002901694700002901723700002501752700002401777856012801801 2021 eng d a2366-748600aIn situ preparation of ionomer as a tool for triple-phase boundary enhancement in 3D graphene supported Pt catalyst0 aIn situ preparation of ionomer as a tool for triplephase boundar cJAN a20001250 v53 a

For improving the performance of platinum electrocatalysts in polymer electrolyte membrane fuel cells (PEMFCs), it is important to enhance the Pt utilization level in the catalyst systems. A high performing electrocatalyst (Pt/3DNG) is developed for PEMFC applications by using nitrogen-doped 3D graphene (3DNG) as the support material and an in situ grafted active ``triple-phase boundary'' to more precisely control the formation of the proton conducting ionomer interface at the active sites. Considering the 3D morphology of the system, during the electrode fabrication for realistic single-cell evaluation, the concept of in situ generation of the proton conducting-ionomer based ``active triple-phase boundary'' is introduced, which could potentially replace the conventional method of using Nafion ionomer for the electrode preparation. The monomers owing to their small-size can access the pores and inner regions of the 3DNG support, which on UV-curing, undergo polymerization and transform into an ionomer with an extended interfacial network into the nanoregimes of 3DNG. Single cell evaluation of the membrane electrode assembly in a high-temperature PEMFC by using phosphoric acid doped polybenzimidazole membrane demonstrates the utility of the present strategy.

10aelectrocatalysts10afuel cells10agraphene10aoxygen reduction reaction1 aGangadharan, Pranav, K.1 aVijayakumar, Vidyanand1 aNediyirakkal, Shijil, A.1 aFernandez, Roshni, Tresa1 aSiddharthan, Adhrika1 aKurungot, Sreekumar uhttps://library.ncl.res.in/content/situ-preparation-ionomer-tool-triple-phase-boundary-enhancement-3d-graphene-supported-pt02002nas a2200241 4500008004100000022001400041245010600055210006900161260000800230300001100238490000800249520116900257653002101426653000801447653002101455653003201476653002201508653002901530100002201559700002501581700002901606856012501635 2022 eng d a0169-433200aDoped 2D VX2 (X = S, Se, Te) monolayers as electrocatalysts for ammonia production: a DFT based study0 aDoped 2D VX2 X S Se Te monolayers as electrocatalysts for ammoni cNOV a1544010 v6023 a

Electrocatalytic nitrogen fixation under ambient conditions on vanadium dichalcogenides (VX2) with non-metal dopants has been explored herein. Understanding the interface chemistry, inherent electronic and acute synergistic nature of non-metal dopants on two unique phases of VX2 has been meticulously explored through a scrutiny of several non-metal atoms as catalytic centers. The efficacity of N-2 chemisorption and N-N bond activation has been implemented as crucial parameters to realize boron and carbon doped VX2 monolayers to be electrocatalytically active for nitrogen reduction reaction (NRR). Detailed investigation on the NRR mechanism brings out the pivotal role of thermodynamic favourability for product formation obtained from Gibbs free energy differences. The charge transfer on N and pi-pi* orbital hybridization and electron ``donor-acceptor `` mechanism between the non-metal and N-2 has been found to modulate the electrocatalytic barrier for NRR on VX2 monolayers. This study proposes boron doped VS2 as an efficient chemically feasible, earth abundant sustainable electrocatalyst for NRR with an overpotential as low as 0.06 eV.

10a1T and 2H phases10aDFT10aelectrocatalysts10aNitrogen Reduction Reaction10aNon metal dopants10aVanadium dichalcogenides1 aMaibam, Ashakiran1 aBabaRao, Ravichandar1 aKrishnamurty, Sailaj, A. uhttps://library.ncl.res.in/content/doped-2d-vx2-x-s-se-te-monolayers-electrocatalysts-ammonia-production-dft-based-study02595nas a2200277 4500008004100000022001400041245018300055210006900238260000800307490000700315520155700322653002401879653002501903653002101928653003301949653002901982653003102011100001902042700002902061700002202090700002102112700002002133700002502153700001902178856012002197 2023 eng d a1613-681000aMetal-organic framework-derived mesoporous B-doped CoO/Co@N-doped carbon hybrid 3D heterostructured interfaces with modulated cobalt oxidation states for alkaline water splitting0 aMetalorganic frameworkderived mesoporous Bdoped CoOCoNdoped carb cAUG0 v193 a

Heteroatom-doped transition metal-oxides of high oxygen evolution reaction (OER) activities interfaced with metals of low hydrogen adsorption energy barrier for efficient hydrogen evolution reaction (HER) when uniformly embedded in a conductive nitrogen-doped carbon (NC) matrix, can mitigate the low-conductivity and high-agglomeration of metal-nanoparticles in carbon matrix and enhances their bifunctional activities. Thus, a 3D mesoporous heterostructure of boron (B)-doped cobalt-oxide/cobalt-metal nanohybrids embedded in NC and grown on a Ni foam substrate (B-CoO/Co@NC/NF) is developed as a binder-free bifunctional electrocatalyst for alkaline water-splitting via a post-synthetic modification of the metal-organic framework and subsequent annealing in different Ar/H-2 gas ratios. B-CoO/Co@NC/NF prepared using 10% H-2 gas (B-CoO/Co@NC/NF [10% H-2]) shows the lowest HER overpotential (196 mV) and B-CoO/Co@NC/NF (Ar), developed in Ar, shows an OER overpotential of 307 mV at 10 mA cm(-2) with excellent long-term durability for 100 h. The best anode and cathode electrocatalyst-based electrolyzer (B-CoO/Co@NC/NF (Ar)(+)//B-CoO/Co@NC/NF (10% H-2)(-)) generates a current density of 10 mA cm(-2) with only 1.62 V with long-term stability. Further, density functional theory investigations demonstrate the effect of B-doping on electronic structure and reaction mechanism of the electrocatalysts for optimal interaction with reaction intermediates for efficient alkaline water-splitting which corroborates the experimental results.

10a3D heterostructures10aB-doped metal-oxides10aelectrocatalysts10ahydrogen evolution reactions10ametal-organic frameworks10aoxygen evolution reactions1 aCha, Dun, Chan1 aSingh, Thangjam, Ibomcha1 aMaibam, Ashakiran1 aKim, Tae, Hyeong1 aNam, Dong, Hwan1 aBabaRao, Ravichandar1 aLee, Seunghyun uhttps://library.ncl.res.in/content/metal-organic-framework-derived-mesoporous-b-doped-coocon-doped-carbon-hybrid-3d02382nas a2200241 4500008004100000022001400041245017800055210006900233260000800302490000700310520149900317653000801816653002101824653002501845653000801870653002401878100002101902700001801923700002001941700002401961700003101985856012402016 2025 eng d a1616-301X00aDesign and synthesis of PtPdNiCoMn high-entropy alloy electrocatalyst for enhanced alkaline hydrogen evolution reaction: a theoretically supported predictive design approach0 aDesign and synthesis of PtPdNiCoMn highentropy alloy electrocata cAPR0 v353 a

Electrocatalytic hydrogen generation requires a cutting-edge, multifunctional electrocatalyst with abundant active sites to drive multielectron transfer reactions. High entropy alloys (HEA) are complex five or more-element alloy systems with high configurational entropy which makes them unique materials for next-generation electrocatalysts. Here, in this work, based on new screening guidelines for catalyst selections that combine density-functional theory calculated Gibbs formation-enthalpy with bond length and electronegativity variance, a novel HEA electrocatalyst consisting of five elements, namely, Pt, Pd, Ni, Co, and Mn is designed. By simple room temperature electrodeposition, the designed catalyst is prepared and its hydrogen evolution reaction (HER) is explored and validated through experimental and theoretical approaches. The HEA demonstrated a superior HER activity with an overpotential of 22.6 mV at -10 mA cm-2 which outperforms Pt/C commercial catalyst. No evident degradation of the material is detected even after 100 hours of continuous operation under high current density. Moreover, the HEA has shown exceptional performance in harsh electrolyte conditions such as in simulated seawater and actual seawater. Remarkably, the density-functional theory calculated small Gibbs formation-enthalpy (approximate to 0 eV) compared to Pt/C places the new HEA near the apex of Trasatti's model of Volcano plot, which is also suggestive of superior HER activity.

10aDFT10aelectrocatalysts10aElectronic Structure10aHER10ahigh-entropy alloys1 aChandran, Athira1 aDutta, Pritha1 aSingh, Prashant1 aSingh, Ashutosh, K.1 aPrasad, Bhagavatula, L. V. uhttps://library.ncl.res.in/content/design-and-synthesis-ptpdnicomn-high-entropy-alloy-electrocatalyst-enhanced-alkaline02263nas a2200217 4500008004100000022001400041245014400055210006900199260000800268490000700276520145500283653002101738653000801759653002401767653002701791100002101818700002001839700002401859700003101883856013101914 2025 eng d a1613-681000aSynthesis framework for designing PtPdCoNiMn high-entropy alloy: a stable electrocatalyst for enhanced alkaline hydrogen evolution reaction0 aSynthesis framework for designing PtPdCoNiMn highentropy alloy a cJAN0 v213 a

High entropy alloys (HEAs) are an emerging class of advanced materials characterized by their multifunctionality and potential to replace commercial catalysts in electrocatalytic water splitting. The synergy among the various alloyed elements in HEAs makes them particularly promising for applications in electrocatalysis. However, preparation of HEA via bottom-up approaches by avoiding the formation of mono, di, and tri metallic alloys in the nanoscale is challenging. This aspect is addressed, in this study by exploring the logical selection of solvents, reducing agents, and capping agents, along with their relative fractions, in the solvothermal synthesis of the HEA comprising platinum-palladium-cobalt-nickel-manganese (PtPdCoNiMn). It is established that the reducing capabilities of both the solvent and reducing agent are crucial for the reduction of each metal to form a single-phase HEA. The synthesized HEA (20 wt.%)/functionalized carbon (FC) demonstrates excellent performance as an HER catalyst, exhibiting a low overpotential of 48.7 mV at -10 mA cm-2 in an alkaline electrolyte. This performance is characterized by high reaction kinetics and stability at elevated current densities. Furthermore, the catalyst shows impressive performance in both simulated and actual seawater. This development reduces the reliance on platinum while enhancing the long-term durability and catalytic efficiency of the electrocatalyst.

10aelectrocatalysts10aHER10ahigh entropy alloys10asolvothermal synthesis1 aChandran, Athira1 aSahoo, Sudeshna1 aSingh, Ashutosh, K.1 aPrasad, Bhagavatula, L. V. uhttps://library.ncl.res.in/content/synthesis-framework-designing-ptpdconimn-high-entropy-alloy-stable-electrocatalyst-enhanced