Structure and electrochemical activity of nickel aluminium fluoride nanosheets during urea electro-oxidation in an alkaline solution.

ABSTRACT: An electrocatalyst of potassium nickel aluminium hexafluoride (KNiAlF₆) nanosheets has been prepared using solid-phase synthesis at 900 °C. X-ray diffraction, scanning electron microscopy, and conductivity studies confirmed the formation of KNiAlF₆ nanosheets having a cubic defect pyrochlore structure with an average thickness of 60-70 nm and conductivity of 1.297 × 10³ S m^-1. The electrochemical catalytic activity of the KNiAlF₆ nanosheets was investigated for urea oxidation in alkaline solution. The results show that the KNiAlF₆ nanosheets exhibit a mass activity of ∼395 mA cm^-2 mg^-1 at 1.65 V vs. HRE, a reaction activation energy of 4.02 kJ mol^-1, Tafel slope of 22 mV dec^-1

SUBMITTER: Aladeemy SA 

PROVIDER: S-EPMC8694015 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature