Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 615, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2021.126205
Keywords
Nickel-Cobalt bimetallic; Nanowire arrays; HER; DFT calculation
Categories
Ask authors/readers for more resources
Nickel-based nanowire arrays with varying cobalt content were prepared using a modified electrodeposition method for hydrogen evolution reaction. The experimental results showed that nanowire arrays with a nickel-cobalt atomic ratio of 32:1 exhibited superior performance, and density functional theory calculations confirmed that materials doped with 1Co had better electrocatalytic activity.
Nickel-based nanowire arrays with different cobalt content were prepared via a modified template-assisted electrodeposition method for hydrogen evolution reaction. The experimental results proved that, compared with samples of other ratios, the nanowire arrays with a nickel-cobalt atomic ratio of 32:1 exhibited better hydrogen evolution performance, and an overpotential of 103 mV was required to obtain a current density of 10mA.cm(-2), while the nanowire arrays with a ratio of nickel-cobalt of 3:1 required an overpotential of 171 mV to achieve the same current density. The density functional theory (DFT) calculations performed were consistent with the experimental results that Ni-based materials doped with 1Co had better electrocatalytic activity than those doped with 2Co. The excellent hydrogen evolution performance of catalyst was attributed to the synergy between nickel and cobalt atoms and the nanowire structure increased the specific surface area exposing more active sites for hydrogen adsorption and adsorption.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available