Abstract
The influence of some transition metal ion substitutions in the active 0.2 mole strontium‐doped lanthanum cobaltate ( with B = Ni, Fe, Cu, and Cr; 0.1 ⩽ y ⩽ 0.4) lattice was studied on the electrocatalytic properties of the oxide by cyclic voltammetry and Tafel polarization techniques. The cyclic voltammetry showed a pair of redox peaks prior to the onset of oxygen evolution, regardless of the nature of the substitution. The presence of Fe or Ni, in small quantities, enhanced the electrochemically active area. The anodic polarization studies indicated two Tafel slopes: ∼2.3 RT/F at low and ∼2(2.3 RT/F) at high overpotentials. The oxygen evolution reaction on each B‐site substituted perovskite followed first‐order kinetics with respect to ion concentration. The and electrodes showed the highest electrocatalytic activity based on geometrical surface area. Copper and chromium substitutions had detrimental effects on the electrocatalytic activity.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.