High-Valence-State NiO/Co3O4 Nanoparticles on Nitrogen-Doped Carbon for Oxygen Evolution at Low Overpotential

Muhammad Tahir, Lun Pan, Rongrong Zhang, Yi-cheng Wang, Guoqiang Shen, Imran Aslam, M. A. Qadeer, Nasir Mahmood, Wei Xu, Li Wang, Xiangwen Zhang, Ji-jun Zou

Research output: Contribution to journalArticlepeer-review

Abstract

The electrocatalytic oxygen evolution reaction (OER) plays a critical role in sustainable energy conversion and storage, but OER is severely hampered owing to the lack of highly efficient catalysts. Here, we report an efficient electrocatalyst, with NiO/Co3O4 nanoparticles decorated on nitrogen-doped carbon (NiO/Co3O4@NC). Abundant high-valence Ni3+ and Co3+ species were observed on the surface of the hybrid due to the strong NC–metal oxide and NiO–Co3O4 interactions. This unique structure leads to excellent OER performance, delivering a very low overpotential of 240 mV@10 mA·cm–2 on glassy carbon and 200 mV@10 mA·cm–2 on Ni foam in KOH and having a turnover frequency (@350 mV overpotential) 6 and 16 times higher than that of IrO2 and RuO2, respectively.
Original languageEnglish (US)
Pages (from-to)2177-2182
Number of pages6
JournalACS Energy Letters
Volume2
Issue number9
DOIs
StatePublished - Sep 8 2017

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry

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