01900nas a2200181   4500008004100000022001400041245012300055210006900178260000900247300001400256490000600270520122500276100002101501700002001522700002301542700002401565856012901589       2020                        eng d  a2516-023000aNiFe layered double hydroxide-decorated N-doped entangled-graphene framework: a robust water oxidation electrocatalyst0 aNiFe layered double hydroxidedecorated Ndoped entangledgraphene   cAPR   a1709-17170 v23 a<p>Three dimensional (3D) porous carbon materials are highly desirable for electrochemical applications owing to their high surface area and porosity. Uniformly distributed porosity in the 3D architecture of carbon support materials allows reactant molecules to access more electrochemically active centres and simultaneously facilitate removal of the product formed during electrochemical reactions. Herein, we have prepared a nitrogen-doped entangled graphene framework (NEGF), decorated with NiFe-LDH nanostructures by an in situ solvothermal method followed by freeze-drying at high vacuum pressure and low temperature. The freeze-drying method helped to prevent the restacking of the graphene sheets and the formation of a high surface area nitrogen-doped entangled graphene framework (NEGF) supported NiFe-LDHs. The incorporation of the NEGF has significantly reduced the overpotential for the electrochemical oxygen evolution reaction (OER) in 1 M KOH solution. This corresponds to an overpotential reduction from 340 mV for NiFe-LDHs to 290 mV for NiFe-LDH/NEGF to reach the benchmark current density of 10 mA cm(-2). The preparation of the catalyst is conceived through a low-temperature scalable process.</p>
1 aManna, Narugopal1 aAyasha, Nadeema1 aSingh, Santosh, K.1 aKurungot, Sreekumar  uhttps://library.ncl.res.in/content/nife-layered-double-hydroxide-decorated-n-doped-entangled-graphene-framework-robust-water