2018
DOI: 10.1021/acscatal.8b01609
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Abstract: The development of highly active and durable inexpensive electrocatalysts for hydrogen evolution reaction (HER) is still a formidable challenge. Herein, an ordered hexagonal-closed-packed (hcp)-Ru nanocrystal coated with a thin layer of N-doped carbon (hcp-Ru@NC) was fabricated through the thermal annealing of polydopamine (PDA)-coated Ru nanoparticle (RuNP@PDA). As an alternative to Pt/C catalyst, the hcp-Ru@NC nanocatalyst exhibited the small overpotential of 27.5 mV at a current density of 10 mA cm −2 , as … Show more

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Cited by 163 publications
(132 citation statements)
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“…Unfortunately, only negligible HER current density was observed on the Co-B i /BNC (Figure 5a). [21] To this end, we doped a small amount of Ru into the Co-B i / BNC for improving the HER activity. [20] It is well known that the metallic Ru possessed the similar metal-H strength as that of metallic Pt, but the price of Ru is only a tenth of that for Pt.…”
Section: Resultsmentioning
confidence: 99%
“…Unfortunately, only negligible HER current density was observed on the Co-B i /BNC (Figure 5a). [21] To this end, we doped a small amount of Ru into the Co-B i / BNC for improving the HER activity. [20] It is well known that the metallic Ru possessed the similar metal-H strength as that of metallic Pt, but the price of Ru is only a tenth of that for Pt.…”
Section: Resultsmentioning
confidence: 99%
“…Nonsupported Ru‐based NPs have been prepared through a myriad of methods, such as the thermal decomposition/calcination of anhydrous RuO 2 , Ru salt, or a Ru complex; or through the electroreduction of a Ru salt, Ru perovskite‐type precursor, or Ru complex . However, the tailored synthesis and rational catalytic fine‐tuning of nonsupported Ru‐based NPs is not a simple matter.…”
Section: Hydrogen Evolution Reaction (Her)mentioning
confidence: 99%
“…Ru nanoparticles with well‐defined surfaces have only been formed using 5 mol equivalents DDA, which allows monomer addition to create the low‐index facets on hourglass‐shaped nanoparticles . To date, a simple synthetic method for controlling the crystallinity of Ru nanoparticles has not been reported, with postsynthesis annealing processes being commonly used instead . It is important to readily tune the crystallinity in order to control the specific facets, defects, and atomic arrangements at the surface of a nanoparticle, which are critical for catalysis .…”
mentioning
confidence: 99%
“…To date, a simple synthetic method for controlling the crystallinity of Ru nanoparticles has not been reported, with postsynthesis annealing processes being commonly used instead . It is important to readily tune the crystallinity in order to control the specific facets, defects, and atomic arrangements at the surface of a nanoparticle, which are critical for catalysis . We show that changing the ratio of surfactant is a simple method to control the crystallinity of nanoparticles that can be applied to other one‐pot or multistep syntheses.…”
mentioning
confidence: 99%