02816nas a2200229   4500008004100000022001400041245015400055210006900209260000900278300001400287490000600301520197100307100001802278700002902296700001702325700002302342700002802365700002102393700001802414700003002432856012402462       2024                        eng d  a2398-490200aDesign of Bi-functional mixed oxide electrodes for selective oxidative C-C cleavage of glycerol to formate and synchronized green hydrogen production0 aDesign of Bifunctional mixed oxide electrodes for selective oxid  cJUN   a2954-29680 v83 a<p>
	Alkaline water electrolysis is a mature method to produce green hydrogen; however, it suffers from significantly high cost as high overpotentials are required for the oxygen evolution reaction (OER). However, the OER could be avoided altogether by replacing it with kinetically favorable oxidation of abundantly available feedstock molecules at a significantly low potential to value-added product(s) together with green hydrogen generation. This is a potential method to address the high cost of green hydrogen production while converting waste to wealth. Herein, we report green, template-free hydrothermal synthesis of an electrochemically active NiCoMn mixed oxide (NCMO) electrocatalyst with multiple sites, porous structure, large surface area, and nanoneedle (NN) morphology deposited directly over Ni foam (NF). Sustainable electrocatalytic performance was demonstrated for 120 h in 0.2 M alkaline glycerol using chronoamperometry and chronopotentiometry. Highly selective formate production demonstrated an exclusive C-C cleavage with the present catalyst system. Oxides of individual metal-ions (Ni, Co, and Mn) and their bimetallic combination (NiCo, NiMn, and CoMn) exhibited lower activity and product selectivity than the trimetallic NCMO electrocatalyst. The membrane-free two-electrode electrolyzer setup with NCMO/NF at both the anode and cathode (NCMO/NF &amp; Vert;NCMO/NF) requires 1.63 V to accomplish 100 mA cm-2 with 0.2 M glycerol, which is 296 mV less than that of 1 M KOH solution. High faradaic efficiency was observed for hydrogen (98%) with highly selective formate (90%) production. Electrocatalytic formate generation from an alkaline glycerol solution with NCMO is an energy-efficient and promising approach that also supplies carbon-negative green H2. NiCoMn oxide nanoneedles with a cactus-like morphology are shown as bifunctional electrocatalysts that selectively oxidize glycerol to HCOOH and concurrently produce H2.</p>
1 aSaha, Arindam1 aMurugiah, Vasantharadevi1 aRanjan, Ravi1 aChauhan, Inderjeet1 aPatra, Kshirodra, Kumar1 aBajpai, Himanshu1 aSaha, Avisekh1 aGopinath, Chinnakonda, S.  uhttp://library.ncl.res.in/content/design-bi-functional-mixed-oxide-electrodes-selective-oxidative-c-c-cleavage-glycerol00863nas a2200241   4500008004100000022001400041245012900055210006900184260000900253300001600262490000700278653001800285653001400303653001500317653001500332100002500347700002200372700001700394700003000411700001800441700003100459856013100490       2024                        eng d  a1144-054600aFuel-influenced nanorod-to-nanosphere transformation of vanadium-doped ZnO and its performance in dye-sensitized solar cells0 aFuelinfluenced nanorodtonanosphere transformation of vanadiumdop  cNOV   a19175-191870 v4810aNanoparticles10aNanowires10aPhotoanode10aThin-films1 aKuppusamy, Sasikumar1 aMohan, Theanmozhi1 aKumar, Gnana1 aGopinath, Chinnakonda, S.1 aSaha, Arindam1 aMichael, Robin, Jude Vimal  uhttp://library.ncl.res.in/content/fuel-influenced-nanorod-nanosphere-transformation-vanadium-doped-zno-and-its-performance-dye02815nas a2200241   4500008004100000022001400041245014600055210006900201260000800270300001400278490000700292520194900299100002302248700001502271700002102286700002902307700001802336700002402354700001802378700001902396700003002415856012802445       2025                        eng d  a2050-748800aMultifunctional NiO/Ti3+-TiO2 for concurrent water reduction and glycerol oxidation to value added products by sunlight driven photocatalysis0 aMultifunctional NiOTi3TiO2 for concurrent water reduction and gl  cJAN  a2105-21200 v133 a<p>
	The present work describes the synthesis of bifunctional-mesoporous-self-doped Ti3+ containing NiO/TiO2 photocatalysts for concurrent utilization of e- and h+ to produce H2 and value-added products (VAPs), respectively, from aqueous glycerol. UV-vis diffuse reflectance results and band gap analysis revealed an improved light absorption due to integration of Ni2+ with Ti3+/TiO2. Various electrochemical, PL and TRPL spectral analyses demonstrate p-n heterojunction formation between NiO and Ti3+-TiO2, which enhances charge separation and helps in achieving improved activity. HRTEM analysis of NiO/Ti3+-TiO2 nanocomposites revealed that NiO is highly dispersed on TiO2 with interfacial heterojunctions between them. XPS results demonstrate the partial reduction of Ti4+ to Ti3+ and Ni-Ti synergetic interaction in NiO/TiO2 to form NiO/Ti3+-TiO2 nanocomposites. EXAFS studies show that the Ni-O bond distance is similar to that of NiTiO3 suggesting electronic integration of components of the photocatalyst by forming a Ni2+-O-Ti3+/Ti4+ lattice network. Ni2+/Ti3+-TiO2 nanocomposites as a bifunctional photocatalyst exhibited significantly enhanced activity in H2 production and conversion of glycerol to VAPs, namely, glycolaldehyde, 1,3-dihydroxyacetone, and formic acid; formation of these products highlights not only oxidation, but also C-C cleavage of glycerol. The NiO/Ti3+-TiO2 photocatalysts fabricated in thin film form displayed higher photocatalytic efficiency than their powder counterpart. Among NiO/Ti3+-TiO2 nanocomposites NiT-3 exhibits the highest H2 yield at 15.62 mmol h-1 g-1, which is 38 times higher than that of bare TiO2. The enhanced photocatalytic activity is ascribed to the high charge carrier density, the synergistic interaction between Ni2+ and Ti3+-TiO2, formation of a p-n heterojunction at the interface between NiO and Ti3+-TiO2 and effective utilization of charge carriers for redox reactions.</p>
1 aRajendran, Sivaraj1 aSaju, Simi1 aMani, Sunesh, S.1 aAsoka, Anantha, Krishnan1 aSaha, Arindam1 aArun, Pushkaran, S.1 aGhosh, Biplab1 aMathew, Thomas1 aGopinath, Chinnakonda, S.  uhttp://library.ncl.res.in/content/multifunctional-nioti3-tio2-concurrent-water-reduction-and-glycerol-oxidation-value-added