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

Tulin Avci Hansu, Omer Sahin, Aykut Çağlar, Hilal Demir Kivrak*

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22 Atıf (Scopus)

Özet

In 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.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)6054-6066
Sayfa sayısı13
DergiInternational Journal of Energy Research
Hacim45
Basın numarası4
DOI'lar
Yayın durumuYayınlandı - 25 Mar 2021
Harici olarak yayınlandıEvet

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© 2020 John Wiley & Sons Ltd

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