4.8 Article

Exceptional catalytic activity of oxygen evolution reaction via two-dimensional graphene multilayer confined metal-organic frameworks

Journal

NATURE COMMUNICATIONS
Volume 13, Issue 1, Pages -

Publisher

NATURE PORTFOLIO
DOI: 10.1038/s41467-022-33847-z

Keywords

-

Funding

  1. National Natural Science Foundation of China [22172156, 91945302, 22278364, 22211530045, 22178308, 21922811, 21878270]
  2. Zhejiang Provincial Natural Science Foundation of China [LR19B060002]
  3. Startup Foundation for Hundred-Talent Program of Zhejiang University
  4. Excellent Youth Foundation of Zhejiang Province of China [LR21E030001]
  5. Science Foundation of Donghai Laboratory [DH2022KF0310]
  6. Key Laboratory of Marine Materials and Related Technologies (CAS) [2020K10]
  7. National Key Research and Development Program of China [2021YFA1500702]
  8. DNL cooperation Fund, CAS [DNL202003]
  9. Strategic Priority Research Program of the Chinese Academy of Sciences [XDB36030200]
  10. Hefei Synchrotron Radiation Facility (HSRF)

Ask authors/readers for more resources

This study presents a strategy to enhance the OER activity of poorly conductive MOFs by confining them between graphene multilayers. The results show that this strategy significantly reduces the overpotential and retains the activity, and can be applied to other MOFs of different structures to enhance their electrocatalytic activities.
Oxygen evolution reaction (OER) plays a key role in many renewable energy technologies such as water splitting and metal-air batteries. Metal-organic frameworks (MOFs) are appealing to design efficient OER electrocatalysts, however, their intrinsic poor conductivity strongly hinders the activity. Here, we show a strategy to boost the OER activity of poor-conductive MOFs by confining them between graphene multilayers. The resultant NiFe-MOF//G gives a record-low overpotential of 106 mV to reach 10 mA cm(-2) and retains the activity over 150 h, which is in significant contrast to 399 mV of the pristine NiFe-MOF. We use X-ray absorption spectroscopy (XAS) and computations to demonstrate that the nanoconfinement from graphene multilayers not only forms highly reactive NiO6-FeO5 distorted octahedral species in MOF structure but also lowers limiting potential for water oxidation reaction. We also demonstrate that the strategy is applicable to other MOFs of different structures to largely enhance their electrocatalytic activities.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.8
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available