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

doi:10.1002/er.6226

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^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

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 (R_SBH)_. 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. R_SBH 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 (C_NaOH), reaction temperature (T_rxn), SBH concentration (C_SBH), and amount of nanocatalyst (M_c) affect R_SBH 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⁻¹_cat 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 R_SBH.

Original language	English
Pages (from-to)	6054-6066
Number of pages	13
Journal	International Journal of Energy Research
Volume	45
Issue number	4
DOIs	https://doi.org/10.1002/er.6226
Publication status	Published - 25 Mar 2021
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2020 John Wiley & Sons Ltd

Keywords

RuCo
characterization
dehydrogenation
nanocatalyst
sodium borohydride

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/er.6226

Cite this

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

abstract = "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.",

keywords = "RuCo, characterization, dehydrogenation, nanocatalyst, sodium borohydride",

author = "{Avci Hansu}, Tulin and Omer Sahin and Aykut {\c C}ağlar and {Demir Kivrak}, Hilal",

note = "Publisher Copyright: {\textcopyright} 2020 John Wiley & Sons Ltd",

year = "2021",

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doi = "10.1002/er.6226",

language = "English",

volume = "45",

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Untangling the cobalt promotion role for ruthenium in sodium borohydride dehydrogenation with multiwalled carbon nanotube-supported binary ruthenium cobalt catalyst. / Avci Hansu, Tulin; Sahin, Omer; Çağlar, Aykut et al.
In: International Journal of Energy Research, Vol. 45, No. 4, 25.03.2021, p. 6054-6066.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Untangling the cobalt promotion role for ruthenium in sodium borohydride dehydrogenation with multiwalled carbon nanotube-supported binary ruthenium cobalt catalyst

AU - Avci Hansu, Tulin

AU - Sahin, Omer

AU - Çağlar, Aykut

AU - Demir Kivrak, Hilal

PY - 2021/3/25

Y1 - 2021/3/25

N2 - 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.

AB - 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.

KW - RuCo

KW - characterization

KW - dehydrogenation

KW - nanocatalyst

KW - sodium borohydride

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DO - 10.1002/er.6226

M3 - Article

AN - SCOPUS:85096797050

SN - 0363-907X

VL - 45

SP - 6054

EP - 6066

JO - International Journal of Energy Research

JF - International Journal of Energy Research

IS - 4

ER -

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

Abstract

Bibliographical note

Keywords

UN SDGs

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