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An efficient and pH-universal ruthenium-based catalyst for the hydrogen evolution reaction

Nature nanotechnology, 2017-05, Vol.12 (5), p.441-446 [Peer Reviewed Journal]

Copyright Nature Publishing Group May 2017 ;ISSN: 1748-3387 ;EISSN: 1748-3395 ;DOI: 10.1038/nnano.2016.304 ;PMID: 28192390

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  • Title:
    An efficient and pH-universal ruthenium-based catalyst for the hydrogen evolution reaction
  • Author: Mahmood, Javeed ; Li, Feng ; Jung, Sun-Min ; Okyay, Mahmut Sait ; Ahmad, Ishfaq ; Kim, Seok-Jin ; Park, Noejung ; Jeong, Hu Young ; Baek, Jong-Beom
  • Subjects: Bonding strength ; Carbon ; Catalysts ; Hydrogen evolution ; Media ; Platinum ; Ruthenium ; Stability
  • Is Part Of: Nature nanotechnology, 2017-05, Vol.12 (5), p.441-446
  • Description: The hydrogen evolution reaction (HER) is a crucial step in electrochemical water splitting and demands an efficient, durable and cheap catalyst if it is to succeed in real applications. For an energy-efficient HER, a catalyst must be able to trigger proton reduction with minimal overpotential and have fast kinetics. The most efficient catalysts in acidic media are platinum-based, as the strength of the Pt-H bond is associated with the fastest reaction rate for the HER. The use of platinum, however, raises issues linked to cost and stability in non-acidic media. Recently, non-precious-metal-based catalysts have been reported, but these are susceptible to acid corrosion and are typically much inferior to Pt-based catalysts, exhibiting higher overpotentials and lower stability. As a cheaper alternative to platinum, ruthenium possesses a similar bond strength with hydrogen (∼65 kcal mol ), but has never been studied as a viable alternative for a HER catalyst. Here, we report a Ru-based catalyst for the HER that can operate both in acidic and alkaline media. Our catalyst is made of Ru nanoparticles dispersed within a nitrogenated holey two-dimensional carbon structure (Ru@C N). The Ru@C N electrocatalyst exhibits high turnover frequencies at 25 mV (0.67 H  s in 0.5 M H SO solution; 0.75 H  s in 1.0 M KOH solution) and small overpotentials at 10 mA cm (13.5 mV in 0.5 M H SO solution; 17.0 mV in 1.0 M KOH solution) as well as superior stability in both acidic and alkaline media. These performances are comparable to, or even better than, the Pt/C catalyst for the HER.
  • Publisher: England: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 1748-3387
    EISSN: 1748-3395
    DOI: 10.1038/nnano.2016.304
    PMID: 28192390
  • Source: ProQuest Central
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