Effect of Graphene Oxide on the Electrocatalytic Activity of Ni-W Alloy Coating
Journal Title: UNKNOWN - Year 2017, Vol 3, Issue 1
Abstract
Nickel-Tungsten-reduced Graphene Oxide (Ni-W-rGO) composite coating was developed through composite electrodeposition method, and its electrocatalytic activity for alkaline hydrogen evolution reaction (HER) was studied. The development of composite coating with a homogeneous dispersion of rGO nanosheets was achieved from an optimal Ni-W plating bath loaded with nanosheets was achieved from an optimal Ni-W plating bath loaded with graphene oxide (GO), synthesized through the chemical oxidation of graphite. The electrocatalytic efficacy of the composite coating for HER was tested using cyclic voltammetry (CV) and chronopotentiometry (CP) techniques in 1.0 M KOH medium. A remarkable increase in the HER activity was observed for the Ni-WrGO composite coating compared with the Ni-W alloy coating. The variation in composition, surface morphology and crystal structure of the composite coating effected by the incorporation of rGO into the alloy matrix favor the enhanced HER activity, as evidenced by energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM) and X-ray diffraction (XRD).
Authors and Affiliations
Liju Elias, Ampar Chitharanjan Hegde
Keywords
Related Articles
- EP ID EP331820
- DOI 10.21767/2470-9867.10002
- Views 48
- Downloads 0
Electropolymerized Congo Red Film based Sensor for Dopamine: A Voltammetric Study
The polymerization film of Congo red was prepared on the surface of carbon paste electrode by electropolymerization using cyclic voltammetric method. The higher catalytic activity was obtained for electrocatalytic oxidat...
Effect of Graphene Oxide on the Electrocatalytic Activity of Ni-W Alloy Coating
Nickel-Tungsten-reduced Graphene Oxide (Ni-W-rGO) composite coating was developed through composite electrodeposition method, and its electrocatalytic activity for alkaline hydrogen evolution reaction (HER) was studied....
Simultaneous Electrochemical Determination of Articaine HCl and Epinephrine
A simple, precise, accurate and inexpensive voltammetric method was developed for the simultaneous determination of articaine HCl and epinephrine in bulk, pharmaceutical formulations and human urine at carbon paste elect...
Electrochemical Action of FA/O II Chelating Agent and H2O2 on Copper Film in the Polishing Process
The role of chelating agents and H2O2 in chemical mechanical planarization was investigated by electrochemical measurements. First, the open circuit potential, polarization curves and cyclic voltammetry curves of the slu...