Electrocatalytic oxidation Of formaldehyde on nickel ion implanted-modified indium tin oxide electrode

This work investigates formaldehyde (HCHO) oxidation on a novel nickel ion implanted-modified indium tin oxide electrode (NiNPs/ITO). The modified electrode exhibits high electrochemical activity with Ni ions at the fluences of 10 x 10(16) ions cm(-2). The size of nickel nanoparticles (NiNPs) is in the range of 15-40 nm determined by scanning electron microscope (SEM). The electrochemical behaviors of the modified electrode are characterized by cyclic voltammetry (CV). In alkaline medium (i.e. NaOH 0.1 M), a good redox behavior of Ni(III)/Ni(II) couple at the surface of modified electrodes can be observed. Electrochemical performances are measured by electrochemical impedance spectroscopy (EIS) and chronoamperometric. The NiNPs/ITO electrode shows prominent electrocatalytic activity towards the oxidation of formaldehyde with long-term stability, which can be a suitable electrode material in formaldehyde fuel cells. (C) 2015 Elsevier B.V. All rights reserved.