Here, we demonstrate a general strategy to improve the hydrogen evolution catalysis of metal sulfides by modulating the surface electron densities. The N modulated NiCo 2 S 4 nanowire arrays exhibit an overpotential of 41mV at 10mAcm -2 and a Tafel slope of 37mVdec -1 , which are very ...
Three important figures of merit should be considered when developing a practical electrochemical N2-to-NH3 process: the selectivity of NRR over the hydrogen evolution reaction (HER), the energy efficiency of the overall process, and the system throughput of NH3 synthesis. Recently much progress has...
Herein, we show a facile and general approach to a 3D interconnected porous nitrogen-doped graphene foam (NGF) with encapsulated Ge quantum dot@nitrogen-doped graphene yolk-shell nanoarchitecture (Ge-QD@ NG/NGF) for high specific reversible capacity (1,220 mAh g−1), ultra-high rate c...
hydrogen: each exhibits melting temperature maxima10,11,12 and a fluid insulator-to-metal, molecular-to-nonmolecular transformation that is predicted to be continuous at high temperatures and first order at low temperatures7, 13, 14 and progressive molecular breakdown in the solid state10, 15,16...
Among various N-SACs, Fe–N–C has shown the lowest energy pathways,14 high proton/electron transfer rates,15 and the lowest overpotential of ∼80 mV for the CO2-to-CO conversion.14 However, owing to the competing hydrogen evolution reaction (HER) over Fe–N–C catalysts, a high ...
Try Britannica Premium for free and discover more. Subscribe Elemental nitrogen can be used as an inert atmosphere for reactions requiring the exclusion of oxygen and moisture. In theliquid state, nitrogen has valuable cryogenic applications; except for the gaseshydrogen, methane,carbon monoxide,fluorin...
In addition, the LSV curves were obtained using oxygen-saturated electrolytes to ensure full contact between Pt and O2 to optimize the ORR performance. The Ag/AgCl electrode potential (E) was calibrated relative to the reversible hydrogen electrode (RHE), i.e., ERHE = EAg/AgCl + 0.21 V +...
PurificationCatalytic Hydroprocesses and Oil RefiningCatalytic Process Intensification for Green ChemistryCatalytic Reactions in Hydrogen and Ammonia EconomyCatalytic Reforming of MethaneCatalytic Steam Reforming of BiomassCatalytic Transformation of GlycerolChemical Looping for CatalysisChemistry and Heterogeneous/...
Lewis Dot Structure | Definition, Diagrams & Examples from Chapter 38/ Lesson 6 30K Learn about Lewis dot structures. Understand what a Lewis dot structure is and how to draw it, and practice drawing hydrogen, carbon, and other Lewis dot structures. ...
arXiv:1108.0254v3 [physics.atom-ph] 3 Dec 2012Calculation of intermediate–energy electron–impact ionization ofmolecular hydrogen and nitrogen using paraxial approximationVladislav V. SerovDepartment of Theoretical Physics, Saratov State University,83 Astrakhanskaya, Saratov 410012, Russia(Dated: August 27...