Electrocatalytic Oxidation of Hydrazine Using a Cobalt Bis(thiosemicarbazone) Complex

• Published in: Topics in catalysis Vol. 68; no. 13; pp. 1257 - 1267
• Main Authors: Marichelvam, Thamaraichelvan, Murugan, Ganapathi, Holla, Harish, Naranammalpuram Sundaram, Venkata Narayanan, Palanimuthu, Duraippandi
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.07.2025; Springer Nature B.V
• Subjects: Ammonia; Catalysis; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Cobalt compounds; Electrocatalysts; Electrodes; Electron transfer; Hydrazines; Industrial Chemistry/Chemical Engineering; Original Paper; Oxidation; Pharmacy; Physical Chemistry; Voltammetry; Bis(thiosemicarbazone); Hydrazine oxidation; Modified electrodes; Electrocatalyst; Cobalt
• ISSN: 1022-5528; 1572-9028
• DOI: 10.1007/s11244-022-01584-8

In this article we report the synthesis and characterisation of novel cobalt bis(thiosemicarbazone) complex [Co(NH 3 ) 2 L]NO 3 that is utilised as electrocatalyst for the oxidation of hydrazine using modified electrode approach. Electrochemical studies such as cyclic voltammetry, linear sweep voltammetry and chronoamperometry demonstrate superior electrocatalytic behaviour of the prepared complex as compared to bare electrodes. Based on Tafel plot analysis, for electrooxidation of hydrazine, initial one electron transfer is found to be the rate limiting step which is followed by fast three electron transfer for complete oxidation to nitrogen. Chronoamperometry technique show selective response towards hydrazine electrooxidation in the presence of interfering agents and sensitive with the detection limit of 1.7 µM. Based on our studies, cobalt complex modified electrode could be used as an alternative electrocatalyst compared to that of precious metal based electrocatalyst for hydrazine oxidation.