Effect of current density on Ni-Mo electrodeposition using EMIM [Br]. (2nd December 2019)

• Record Type: Journal Article
• Authors: Jesmani, Seyed Mohammad; Amini, Rasool; Abdollah-Pour, Hassan; Mohammadian-Semnani, Hamidreza
• Is Part Of: Surface engineering. Volume 35:Number 12(2019)
• Page Start: 1088
• Page End: 1096
• Publication Date: 2019-12-02
• Subjects: Ni-Mo alloy coating -- direct methanol fuel cell -- electrocatalyst -- EMIM [Br]; Surfaces (Technology) -- Periodicals; Coatings -- Periodicals; 620.4405
• DOI: 10.1080/02670844.2019.1644914
• Languages: English
• ISSNs: 0267-0844

Abstract

ABSTRACT: This study was conducted to investigate the current density impact on the Ni-Mo electrodeposit and on its catalytic activity of methanol oxidation in an alkaline solution. For this purpose, Ni-Mo coatings with good electrocatalytic properties were achieved by electrodeposition in the modified Watts bath containing 1-ethyl-3-methyl imidazolium bromide (EMIM [Br]) ionic liquid. The results showed that a 1–6 A dm −2 increase in the current density could decline the Mo content in the Ni-Mo/Ni coatings. The XRD patterns demonstrate that an amorphous coating formed with increasing the current density. Moreover, it was found that the catalytic performance of Ni-Mo coatings was significantly enhanced in the presence of methanol. Based on the obtained results, the Ni-Mo coating obtained at the current density of 3.5 A dm −2 and in the presence of EMIM [Br] showed a higher anodic current density, lower onset oxidation potential, and better catalytic performance.