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.
20 February 2025Elsevier Ltd
Electrochimica Acta
2025#514
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.
Electrocatalyst , Electrode modification , Hydrogen evolution reaction (HER) , Vanadyl porphyrin
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Al-Farabi Kazakh National University, 71 Al-Farabi Ave., Almaty, 050040, Kazakhstan
Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, Valencia, 46022, Spain
L.N. Gumilyov Eurasian National University, Satpayev 2, Astana, 010008, Kazakhstan
Engineering Faculty, Marmara University, Istanbul, Maltepe, 34854, Turkey
Al-Farabi Kazakh National University
Instituto de Tecnología Química
L.N. Gumilyov Eurasian National University
Engineering Faculty
10 лет помогаем публиковать статьи Международный издатель
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