Surfactant‐Assisted Electrodeposition of Nickel Nanostructures and Their Electrocatalytic Activities Toward Oxidation of Sodium Borohydride, Ethanol, and Methanol

Abstract

Different Ni nanostructures were electrodeposited from the Watts bath in the presence of different concentrations of sodium dodecyl sulfate (SDS) using the pulse reverse current technique on the copper substrate. The concentration of SDS was lower than the critical micelle concentration (CMC), equal to CMC and higher than CMC for electrodeposition of Ni‐1, Ni‐2, and Ni‐3 samples respectively. The electrodeposited samples were characterized by X‐ray diffraction (XRD), atomic force microscopy (AFM), and field emission‐scanning electron microscopy (FE‐SEM) techniques. The electrocatalytic activity of samples for oxidation of sodium borohydride, ethanol, and methanol was investigated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). For borohydride oxidation, one oxidation peak, as well as one semicircle, observed respectively in the cyclic voltammograms and Nyquist diagrams confirmed that only one reaction happened on the surface of samples. It was observed that at high overpotentials, Ni‐1 sample was more reactive for NaBH4 oxidation compared to the Ni‐2 and Ni‐3 samples.

Advanced Catalytic Materials for Ethanol Oxidation in Direct Ethanol Fuel Cells

“…The Ni nanoparticles deposited on graphite electrode from a pH = 5.5 solution exhibit a current density of 1192 mA mg −1 in alkaline solution. To avoid the possible agglomeration of Ni nanoparticles, an anionic surfactant, sodium dodecyl sulfate (SDS), was involved in the electrodeposition process [112]. When the SDS concentration equals to the critical micelle concentration (CMC), the obtained Ni nanoparticles are uniformly distributed.…”

“…Interested readers can refer to the comprehensive review on Ni-based catalysts for ethanol electro-oxidation [14]. Recently, a facile electrodeposition method has been used to prepare Ni nanoparticles as ethanol oxidation catalysts [111,112]. It was found that the pH value of the NiSO 4 bath rather than the Ni ion concentration strongly affects the EOR activity of electrodeposited Ni nanostructures [111].…”

Structural Features and Functional Properties of Y2O3 Reinforced Nickel Matrix Nanocomposites

“…Electrodeposition method is one of the most widely used methods for preparing metals, alloys and composites because of its technologically feasible and economic nature. [1,2] Electroplating of nickel results into coatings having minimum internal stress, high abrasion and wear resistance and thus are suitable for engineering applications. [1,3,4] Because of its plastic workability, hard and corrosion resistant nature, it has been most commonly preferred for the production of metal matrix composites (MMCs).…”

“…[1,2] Electroplating of nickel results into coatings having minimum internal stress, high abrasion and wear resistance and thus are suitable for engineering applications. [1,3,4] Because of its plastic workability, hard and corrosion resistant nature, it has been most commonly preferred for the production of metal matrix composites (MMCs). Nickel composites have paved their path in broad range of applications for example; electronic circuits, aerospace, protective coatings, defense and petrochemical industry etc.…”

Fabrication and Performance Evaluation of Pd‐Cu Nanoparticles for Hydrogen Evolution Reaction

“…Previously, several works have been published about effects of different surfactants including CTAB for electro‐polymerization of m ‐toluidine monomer, impact of TX‐100 in enhancing the capacitance of polyaniline‐based nickel electrodes, effect of sodium lauryl sulfate for the electroanalysis of Riboflavin, SDS for electrodeposition of nickel nanostructures and their electro‐catalytic activities toward oxidation of sodium borohydride, ethanol, and methanol, SDS for electrochemical polymerization of aniline . In other work, a glassy carbon electrode modified with Pt/CTAB nanoscale aggregates was applied for investigation of the HER .…”