Jump to main content
Jump to site search

Issue 17, 2017
Previous Article Next Article

Atomic-scale topochemical preparation of crystalline Fe3+-doped β-Ni(OH)2 for an ultrahigh-rate oxygen evolution reaction

Author affiliations

Abstract

The development of highly efficient and affordable electrocatalysts for the sluggish oxygen evolution reaction (OER) has been considered as a great challenge to the practical applications for water splitting and in rechargeable metal–air batteries. Herein, we report active and robust OER catalysts of Fe3+-doped β-Ni(OH)2 prepared via an atomic-scale topochemical transformation route. Based on the premise that all Fe3+ is incorporated into the β-Ni(OH)2 lattice, the OER activity increases directly with the content of Fe3+. The Fe(0.5)-doped β-Ni(OH)2 catalyst affords a current density of 10 mA cm−2 at an overpotential as low as 0.26 V and a small Tafel slope of 32 mv dec−1. Comparing the state-of-the-art IrO2 catalyst, the Fe(0.5)-doped β-Ni(OH)2 catalyst exhibits higher activity and stability from galvanostatic tests at 10 mA cm−2. Additionally, we experimentally demonstrate that Fe(0.5)-doped β-Ni(OH)2 exerts higher OER activity than Fe(0.5)-doped α-Ni(OH)2. All evidence indicates that Fe and the β-Ni(OH)2 matrix play an important role in NiFe-based catalysts.

Graphical abstract: Atomic-scale topochemical preparation of crystalline Fe3+-doped β-Ni(OH)2 for an ultrahigh-rate oxygen evolution reaction

Back to tab navigation

Supplementary files

Publication details

The article was received on 15 Feb 2017, accepted on 28 Mar 2017 and first published on 28 Mar 2017


Article type: Communication
DOI: 10.1039/C7TA01408B
Citation: J. Mater. Chem. A, 2017,5, 7753-7758
  •   Request permissions

    Atomic-scale topochemical preparation of crystalline Fe3+-doped β-Ni(OH)2 for an ultrahigh-rate oxygen evolution reaction

    K. Zhu, H. Liu, M. Li, X. Li, J. Wang, X. Zhu and W. Yang, J. Mater. Chem. A, 2017, 5, 7753
    DOI: 10.1039/C7TA01408B

Search articles by author

Spotlight

Advertisements