Ni nanoparticle modified graphite electrode for methanol electrocatalytic oxidation in alkaline media

Abstract

Ni nanoparticles with an electroless procedure were deposited on the graphite rod, and the performance of the proposed electrode was evaluated for electrocatalytic oxidation of methanol in alkaline media. The structure and morphology of the electrode surface were examined with X-ray diffraction, energy dispersive X-ray analysis and scanning electron microscopy techniques. Voltammetric and amperometric studies indicated that the onset potential of the methanol oxidation is low (0.42 V) and the electrode stability is good. In addition to these advantages, due to ease of preparation and low cost, it can be used as an anode in methanol fuel cells.

Superior methanol electrooxidation performance of (110)-faceted nickel polyhedral nanocrystals

“…9 In this direction, Ni is considered a main alternative to noble metals, exhibiting excellent performance towards MOR in alkaline media. [10][11][12] To optimize its performance, Ni has been alloyed with different elements and it has been combined or grown on a variety of conductive supports. [13][14][15][16] Additionally, Ni particles with sizes in the nanometer range have been produced to maximize the catalyst surface area and thus the density of surface site.…”

Electrocatalytic Activity of Galvanostatically Deposited Ni Thin Films for Methanol Electrooxidation

“…Different Ni‐nanostructured morphologies, such as nanoparticles and core‐shell nanoparticles , , ultra‐thin sheets , and nanoflakes have been tested in efforts to increase the catalyst surface area and to improve their intrinsic catalytic properties. The synthesis of these materials usually involves several complicated steps, like atomic layer deposition , ion implantation or electroless deposition , contrary to electrodeposition that can be carried out in single and multiple potential steps on the substrate . Previous work by our group proved that ensembles of Ni nanoparticles with narrow size distribution can be obtained on indium tin oxide (ITO) electrodes, by applying short constant current pulses in a borate‐free electrolyte .…”

Ag nanoparticles supported on nickel foam: a flexible 3D electrode for methanol electrocatalytic oxidation

“…During the forward sweep, there is a rapid increase in current at potentials over 0.440 V. This is due to electrocatalytic oxidation of adsorbed methanol species by Ag(I) and NiOOH. According to the CV results and previous reports, [56][57][58][59][60] the associated reactions are presented by eqn (5)- (7). Compared with the N-NF electrocatalytic oxidation of methanol (Fig.…”