Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/52768
Title: Electrocatalytic properties of La1-xCuxCoO3 (0 ≤ x ≤ 0.8) film electrodes for oxygen evolution in alkaline medium: Part II. A comparative study
Authors: Yadav, Manish Kumar
Lal, Basant
Singh, Narendra Kumar
Keywords: Sol-gel route;Perovskite-type oxide;Powder X-ray diffraction (XRD);Electrocatalytic activity;Thermodynamic parameters;Roughness factor
Issue Date: Dec-2019
Publisher: NISCAIR-CSIR, India
Abstract: The present study is concerned with the preparation of perovskite-type oxide film electrodes of La, Cu and Co having composition La1-xCuxCoO3 (0 ≤ X ≤ 0.8) on Ni conducting support and study of their electrocatalytic properties towards oxygen evolution reaction (OER) in alkaline medium. Materials have been synthesized by using malic acid sol-gel route at pH 4.00. X-ray diffraction study of the material indicated the formation of almost pure perovskite phase with hexagonal crystal geometry. The electrocatalytic activity of the material has been determined in three electrode single compartment glass cell. Techniques used in the electrochemical studies are cyclic voltammetry (CV), oxide roughness factor and anodic polarization (Tafel plot). Each cyclic voltammogram exhibits an anodic and a corresponding cathodic peak prior to the oxygen evolution reaction. The observed anodic and cathodic peak potential values are 553±31 and 312±27 mV, respectively. The study of anodic polarization curve indicates that the oxide with 0.6 mol Cu-substitution (ja = 182.4 mA cm-2 at 750 mV) shows highest electrocatalytic activity with lowest Tafel slope value (b = 65 mV decade-1) towards OER. Thermodynamic properties of the material have also been investigated by recording the anodic polarization curve at different temperatures. The value of electrochemical activation energy has been found to be lowest with most active 0.6 mol Cu-substituted oxide material. Electrocatalytic activities of the oxide electrodes, so obtained, have been compared with the similar oxide prepared at 3.75 pH.
Page(s): 1295-1301
URI: http://nopr.niscair.res.in/handle/123456789/52768
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.58A(12) [December 2019]

Files in This Item:
File Description SizeFormat 
IJCA 58A(12) 1295-1301.pdfMain Article519.09 kBAdobe PDFView/Open
IJCA 58A(12) 1295-1301_Suppl Data.pdfSupplementary Data144.99 kBAdobe PDFView/Open


Items in NOPR are protected by copyright, with all rights reserved, unless otherwise indicated.