TM LDH Meets Birnessite: A 2D-2D Hybrid Catalyst with Long-Term Stability for Water Oxidation at Industrial Operating Conditions

Zhuwen Chen, Min Ju, Mingzi Sun, Li Jin, Rongming Cai, Zheng Wang, Lei Dong, Luming Peng, Xia Long, Bolong Huang (Corresponding Author), Shihe Yang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)

Abstract

Efficient noble-metal free electrocatalyst for oxygen evolution reaction (OER) is critical for large-scale hydrogen production via water splitting. Inspired by Nature's oxygen evolution cluster in photosystem II and the highly efficient artificial OER catalyst of NiFe layered double hydroxide (LDH), we designed an electrostatic 2D-2D assembly route and successfully synthesized a 2D LDH(+)-Birnessite(−) hybrid. The as-constructed LDH(+)-Birnessite(−) hybrid catalyst showed advanced catalytic activity and excellent stability towards OER under a close to industrial hydrogen production condition (85 °C and 6 M KOH) for more than 20 h at the current densities larger than 100 mA cm−2. Experimentally, we found that besides the enlarged interlayer distance, the flexible interlayer NiFe LDH(+) also modulates the electronic structure of layered MnO2, and creates an electric field between NiFe LDH(+) and Birnessite(−), wherein OER occurs with a greatly decreased overpotential. DFT calculations confirmed the interlayer LDH modulations of the OER process, attributable to the distinct electronic distributions and environments. Upshifting the Fe-3d orbitals in LDH promotes electron transfer from the layered MnO2 to LDH, significantly boosting up the OER performance. This work opens a new way to fabricate highly efficient OER catalyst for industrial water oxidation.

Original languageEnglish
Pages (from-to)9699-9705
Number of pages7
JournalAngewandte Chemie - International Edition
Volume60
Issue number17
DOIs
Publication statusPublished - 19 Apr 2021

Keywords

  • electrocatalysis
  • hybrid catalysts
  • hydrogen production
  • two-dimensional layered materials
  • water oxidation

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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