Optimizing the electrocatalytic hydrogen production with vanadyl porphyrin impregnated on mesoporous SiO2 nanoparticles

Myltykbayeva Z., López Nieto J. M., Moreno-Torralbo B. M., Concepción P., Abylaikhan A., KOCA A.

Electrochimica Acta, cilt.514, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 514
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.electacta.2025.145686
  • Dergi Adı: Electrochimica Acta
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: Electrocatalyst, Electrode modification, Hydrogen evolution reaction (HER), Vanadyl porphyrin
  • Marmara Üniversitesi Adresli: Evet

Özet

Vanadyl octaethyl porphyrin (VOP) impregnated on SiO2 nanoparticles (SiO2@VOP) was investigated as an electrocatalyst for the water-splitting reaction for the cathodic hydrogen evolution reaction (HER). Multi-valent oxidation states of VO2+ center and multi-electron transfer properties of the porphyrin ring made this complex a potential candidate for the electrocatalytic processes. Altering the electrode modification protocol by changing the amount of the VOP, carbon black (CB), and Nafion (Nf) binder on the modification influenced the active sites, thus consequently enhancing the electrocatalytic activity of SiO2@VOP composites. Electrocatalytic HER measurements indicated excellent activity with low overpotential (108 mV), small Tafel slope (98 mV/dec), and high current density stability with the GCE/CB@SiO2@VOP(B) electrode.