Microwave-Assisted synthesis of CuxFe100-x/Carbon aerogel (x = 0, 30, 50, 70) with enhanced Electrocatalytic activity towards oxygen evolution reaction

Samancı M., Asim M., Hussain A., Janjua N. K., BAYRAKÇEKEN A.

Journal of Electroanalytical Chemistry, cilt.976, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 976
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.jelechem.2024.118811
  • 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: Carbon aerogel, Cu-Fe catalyst, Cyclic voltammetry, Electrochemical surface area, Oxygen evolution reaction, Water oxidation
  • Atatürk Üniversitesi Adresli: Evet

Özet

A simple and efficient microwave-assisted synthesis route was adopted for carbon aerogel (CA)-supported Cu and Fe catalysts for OER in alkaline media. Catalysts were characterized physically by ICP-MS, XRD, TEM, XPS, SEM, and EDX and electrochemically by CV, chronoamperometry, and EIS. The catalyst having the composition of Cu30Fe70/CA showed excellent activity towards OER with low overpotential (345 mV) and Tafel slope (92.5 mV dec−1). Diffusion coefficient (D° = 2.1 × 10−8 cm2 s−1), mass transport coefficient (mT = 2.8 × 10−4 cm s−1), heterogeneous rate constant (k° = 5.7 × 10−4 cm s−1), and electrochemically active surface area (0.0167 cm2) were obtained for Cu30Fe70/CA modified glassy carbon electrode. CV response in the non-faradic region showed that Cdl and electrochemical surface area (ECSA) of Cu30Fe70/CA increased ∼ 34 times compared to Fe/CA. This work suggests that adding up an optimum amount of Cu to the Fe/CA nanocomposite offers a cost-effective and efficient electrocatalyst for OER.