articleJournal of the American Chemical SocietySep 21, 2020GREEN OA

Iridium Single Atoms Coupling with Oxygen Vacancies Boosts Oxygen Evolution Reaction in Acid Media

JYJie YinJJJing JinMLMin LuBHBolong HuangHZHong Zhang

State Key Laboratory of Applied Organic Chemistry · Lanzhou University · +5 more institutions

PubMed
Indexed incrossrefpubmed

Abstract

Simultaneous realization of improved activity, enhanced stability, and reduced cost remains a desirable yet challenging goal in the search of electrocatalysis oxygen evolution reaction (OER) in acid. Herein, we report a novel strategy to prepare iridium single-atoms (Ir-SAs) on ultrathin NiCo2O4 porous nanosheets (Ir–NiCo2O4 NSs) by the co-electrodeposition method. The surface-exposed Ir-SAs couplings with oxygen vacancies (VO) exhibit boosting the catalysts OER activity and stability in acid media. They display superior OER performance with an ultralow overpotential of 240 mV at j = 10 mA cm–2 and long-term stability of 70 h in acid media. The TOFs of 1.13 and 6.70 s–1 at an overpotential of 300 and 370 mV…

Citation impact

526
total citations
FWCI
16.81
Percentile
100%
References
45
Citations per year

Authors

8

Topics & keywords

Topics
Keywords
  • Overpotential
  • Chemistry
  • Iridium
  • Oxygen evolution
  • Electrocatalyst
  • Catalysis
  • Density functional theory
  • Oxygen
No related works found for this paper.

Funding