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Ambient electrocatalytic nitrogen reduction on a MoO/graphene hybrid: Experimental and DFT studies

Catalysis Science and Technology, ISSN: 2044-4761, Vol: 9, Issue: 16, Page: 4248-4254
2019
  • 100
    Citations
  • 0
    Usage
  • 42
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    100
    • Citation Indexes
      100
  • Captures
    42

Article Description

Rational design of effective electrocatalysts toward the N reduction reaction (NRR) is essential for achieving high-efficiency electrocatalytic NH synthesis. Herein, a hybrid catalyst of MoO nanoparticles on reduced graphene oxide (MoO/RGO) was developed to catalyze the NRR under ambient conditions. Electrochemical measurements demonstrated that MoO/RGO presented a high NRR activity with an NH yield of 37.4 μg h mg and a faradaic efficiency of 6.6% at -0.35 V (vs. RHE) in 0.1 M NaSO, comparable to or exceeding those of most reported NRR electrocatalysts. Density functional theory calculations disclosed that the MoO/RGO hybrid possessed stronger electronic interactions with ∗NH and donated more electrons from active Mo sites to ∗NH relative to MoO alone, largely reducing the energy barrier for ∗NH formation, which was the potential-determining step of the NRR process. These results highlight the promising potential of the hybridization strategy and MoO/RGO hybrid for applications in ambient electrocatalytic NH synthesis.

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