Ruthenium anchored on carbon nanotube electrocatalyst for hydrogen production with enhanced Faradaic efficiency

Do Hyung Kweon, Mahmut Sait Okyay, Seok-Jin Kim, Jong-Pil Jeon, Hyuk-Jun Noh, Noejung Park, Javeed Mahmood () and Jong-Beom Baek ()
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Do Hyung Kweon: School of Energy and Chemical Engineering / Center for Dimension-Controllable Organic Frameworks Ulsan National Institute of Science and Technology (UNIST), 50 UNIST
Mahmut Sait Okyay: School of Natural Science Ulsan National Institute of Science and Technology (UNIST), 50 UNIST
Seok-Jin Kim: School of Energy and Chemical Engineering / Center for Dimension-Controllable Organic Frameworks Ulsan National Institute of Science and Technology (UNIST), 50 UNIST
Jong-Pil Jeon: School of Energy and Chemical Engineering / Center for Dimension-Controllable Organic Frameworks Ulsan National Institute of Science and Technology (UNIST), 50 UNIST
Hyuk-Jun Noh: School of Energy and Chemical Engineering / Center for Dimension-Controllable Organic Frameworks Ulsan National Institute of Science and Technology (UNIST), 50 UNIST
Noejung Park: School of Natural Science Ulsan National Institute of Science and Technology (UNIST), 50 UNIST
Javeed Mahmood: School of Energy and Chemical Engineering / Center for Dimension-Controllable Organic Frameworks Ulsan National Institute of Science and Technology (UNIST), 50 UNIST
Jong-Beom Baek: School of Energy and Chemical Engineering / Center for Dimension-Controllable Organic Frameworks Ulsan National Institute of Science and Technology (UNIST), 50 UNIST

Nature Communications, 2020, vol. 11, issue 1, 1-10

Abstract: Abstract Developing efficient and stable electrocatalysts is crucial for the electrochemical production of pure and clean hydrogen. For practical applications, an economical and facile method of producing catalysts for the hydrogen evolution reaction (HER) is essential. Here, we report ruthenium (Ru) nanoparticles uniformly deposited on multi-walled carbon nanotubes (MWCNTs) as an efficient HER catalyst. The catalyst exhibits the small overpotentials of 13 and 17 mV at a current density of 10 mA cm–2 in 0.5 M aq. H2SO4 and 1.0 M aq. KOH, respectively, surpassing the commercial Pt/C (16 mV and 33 mV). Moreover, the catalyst has excellent stability in both media, showing almost “zeroloss” during cycling. In a real device, the catalyst produces 15.4% more hydrogen per power consumed, and shows a higher Faradaic efficiency (92.28%) than the benchmark Pt/C (85.97%). Density functional theory calculations suggest that Ru–C bonding is the most plausible active site for the HER.

Date: 2020
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DOI: 10.1038/s41467-020-15069-3

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