02595nas 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<p>
	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.</p>
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-3d