02535nas 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<p>
	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.</p>
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-amorphous02041nas a2200289   4500008004100000022001400041245012200055210006900177260000800246300001100254490000800265520108000273653001801353653002601371653003801397653002001435100002101455700001901476700001901495700001901514700002101533700001601554700001801570700001901588700002201607856012201629       2023                        eng d  a0926-337300aCovalently interconnected layers in g-C3N4: toward high mechanical stability, catalytic efficiency and sustainability0 aCovalently interconnected layers in gC3N4 toward high mechanical  cMAR  a1220690 v3223 a<p>
	The grim prospects for the industrial utilization of g-C3N4 nanosheets arise from multi-step processing resulting in low material yields and poor visible light response due to quantum confinement. Herein, we introduce a strategy for linking the adjacent layers of g-C3N4 covalently to realize a high surface area without excess mass loss in a one-step process by introducing diethylene glycol as a precursor that produces-(CH2)2-O-(CH2)2-linkers in-situ. Their presence increases interlayer spacing and introduces surface curvatures, discouraging the stacking of a larger number of layers to produce nanosheets with-3 times higher surface area. Interestingly, unlike other layered materials, the linkers also provide extraordinary mechanical stability against exfoliating forces. In addition, the process instills sub-bandgap states and a considerable visible light response at 500 nm to slow down the picosecond exciton recombination dynamics, resulting in-5 times enhancement in H2 generation efficiency from photocatalytic water-splitting over the bulk sample.</p>
10aLayer-linkers10aSustainable synthesis10aTransient absorption spectroscopy10awater-splitting1 aRoy, Raj, Sekhar1 aMondal, Sanjit1 aMishra, Samita1 aBanoo, Maqsuma1 aSahoo, Lipipuspa1 aKumar, Amit1 aVinod, C., P.1 aDe, Arijit, K.1 aGautam, Ujjal, K.  uhttps://library.ncl.res.in/content/covalently-interconnected-layers-g-c3n4-toward-high-mechanical-stability-catalytic