4 research outputs found
Electronic Supplementary Materials including models and fitting of the electrochemical impedance spectroscopy, XRD, XPS, EDX spectra, and polarization curves. from Enhanced hydrogen evolution reaction on hybrids of cobalt phosphide and molybdenum phosphide
Production of hydrogen from water electrolysis has stimulated the search of sustainable electrocatalysts as possible alternatives. Recently, cobalt phosphide (CoP) and molybdenum phosphide (MoP) received great attention due to their superior catalytic activity and stability towards the hydrogen evolution reaction (HER) which rivals platinum catalysts. In this study, we synthesize and study a series of catalysts based on hybrids of CoP and MoP with different Co/Mo ratio. The HER activity shows a volcano shape and reaches a maximum for Co/Mo = 1. Tafel analysis indicates a change in the dominating step of Volmer–Hyrovský mechanism. Interestingly, X-ray diffraction patterns confirmed a major ternary interstitial hexagonal CoMoP<sub>2</sub> crystal phase is formed which enhances the electrochemical activity
Multi-porous Co<sub>3</sub>O<sub>4</sub> nanoflakes @ sponge-like few-layer partially reduced graphene oxide hybrids:Towards highly stable asymmetric supercapacitors
Co3O4 nanoflakes show fast rate capability and superior stability due to the conductivity and well-tuned porosity of spongy-like reduced graphene oxide networks.</p