Novel peripheral and non-peripheral oxobenzo[d]thiazol substituted cobalt phthalocyanines: Synthesis, electrochemistry, spectroelectrochemistry, electrocatalytic hydrogen production in alkaline medium

Akyüz D., ÖZÇİFÇİ Z., MENTEŞE E., AKÇAY H. T.

Journal of Electroanalytical Chemistry, vol.924, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 924
  • Publication Date: 2022
  • Doi Number: 10.1016/j.jelechem.2022.116864
  • Journal Name: Journal of Electroanalytical Chemistry
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, Chimica, Compendex, INSPEC
  • Keywords: Hydrogen production, Alkaline, Cobalt Phthalocyanine, Graphene oxide, Electrocatalysts, EVOLUTION REACTION, LOW-COST, MANGANESE PHTHALOCYANINE, OXYGEN REDUCTION, METAL-FREE, LEAD(II), NANOPARTICLES, COPPER(II), NICKEL(II), NANOSHEETS
  • Kocaeli University Affiliated: No

Abstract

© 2022 Elsevier B.V.In this study novel oxobenzo[d]thiazol substituted cobalt phthalocyanine complexes were synthesized and characterized by FT-IR, NMR, UV–vis spectroscopy, and mass spectrometry. The redox properties of peripheral and non-peripheral substituted CoPc complexes were determined and compared via electrochemical characterization. The reduction–oxidation transitions of the metal and the ring were recorded with in-situ spectroelectrochemical measurements. Electrocatalytic activity of complexes were investigated in alkaline medium for hydrogen evolution reaction. The CoPc complexes exhibited excellent electrocatalytic activity in presence of graphene oxide. The GO/3N-CoPc and GO/4N-CoPc displayed low overpotential of 330 mV at 10 mA cm−2 with Tafel slope of 64 mV dec−1, which superior in comparison with the CoPc (overpotential of 497 mV at 10 mA cm−2). Moreover, GO/3N-CoPc and GO/4N-CoPc electrocatalysts exhibited ∼ 53 times higher catalytic current density than bare GCE.