Untangling the cobalt promotion role for ruthenium in sodium borohydride dehydrogenation with multiwalled carbon nanotube-supported binary ruthenium cobalt catalyst

Avci Hansu T., Sahin O., Çağlar A., Demir Kivrak H.

International Journal of Energy Research, cilt.45, sa.4, ss.6054-6066, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 45 Sayı: 4
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1002/er.6226
  • Dergi Adı: International Journal of Energy Research
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Aquatic Science & Fisheries Abstracts (ASFA), Communication Abstracts, Compendex, Environment Index, INSPEC, Metadex, Pollution Abstracts, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.6054-6066
  • Anahtar Kelimeler: characterization, dehydrogenation, nanocatalyst, RuCo, sodium borohydride, HYDROGEN GENERATION, ELECTROCHEMICAL ACTIVITY, EFFICIENT CATALYST, PLASMA TREATMENT, NABH4 SOLUTION, HYDROLYSIS, RU, NANOPARTICLES, PERFORMANCE, OXIDATION
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

© 2020 John Wiley & Sons LtdIn the present study, multiwalled carbon nanotube-supported Ru (Ru/MWCNT) and RuCo (RuCo/MWCNT) nanocatalysts with 3 wt% Ru loading were synthesized via sodium borohydride (SBH) reduction method for the dehydrogenation of SBH (RSBH). These nanocatalysts were characterized with XRD, XPS, SEM–EDX, and TEM. Ru/MWCNT and Ru:Co/MWCNT catalysts with varying Ru:Co atomic ratios were prepared successfully, and electronic state of Ru:Co altered compared to Ru. RSBH activities of these Ru/MWCNT and RuCo/MWCNT were examined in alkaline environment. RuCo/MWCNT at 80:20 atomic ratio exhibits superior H2 evolution. Further experiments were performed with RuCo/MWCNT at 80:20 atomic ratio to determine how NaOH concentration (CNaOH), reaction temperature (Trxn), SBH concentration (CSBH), and amount of nanocatalyst (Mc) affect RSBH activities. Activation energy (Ea) was calculated using the Arrhenius equation. RuCo/MWCNT at 80:20 atomic ratio exhibits superior H2 evolution activities compared to the literature values. Initial rate (IR) for this nanocatalyst was found as 123.9385 mL H2 g−1cat min−1. As a result of these kinetic calculations, the Ea of the nanocatalysts was calculated as 35.978 kJ/mol. The degree of reaction (n) was found to be 0.53 by trial and error. RuCo/MWCNT at 80:20 atomic ratio is a promising nanocatalyst for RSBH.