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

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

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, cilt.924, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 924
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.jelechem.2022.116864
  • Dergi Adı: JOURNAL OF ELECTROANALYTICAL CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, Chimica, Compendex, INSPEC
  • Anahtar Kelimeler: 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
  • Recep Tayyip Erdoğan Üniversitesi Adresli: Evet

Özet

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 similar to 53 times higher catalytic current density than bare GCE.