Activating lattice oxygen in NiFe-based (oxy)hydroxide for water electrolysis

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Zuyun He
  • Zhiheng Gong
  • Hang Lei
  • Deng Zhou
  • Nian Zhang
  • Wenjie Mai
  • Yan Chen

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Detail(s)

Original languageEnglish
Article number2191
Journal / PublicationNature Communications
Volume13
Online published21 Apr 2022
Publication statusPublished - 2022

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Abstract

Transition metal oxides or (oxy)hydroxides have been intensively investigated as promising electrocatalysts for energy and environmental applications. Oxygen in the lattice was reported recently to actively participate in surface reactions. Herein, we report a sacrificial template-directed approach to synthesize Mo-doped NiFe (oxy)hydroxide with modulated oxygen activity as an enhanced electrocatalyst towards oxygen evolution reaction (OER). The obtained MoNiFe (oxy)hydroxide displays a high mass activity of 1910 A/gmetal at the overpotential of 300 mV. The combination of density functional theory calculations and advanced spectroscopy techniques suggests that the Mo dopant upshifts the O 2p band and weakens the metal-oxygen bond of NiFe (oxy)hydroxide, facilitating oxygen vacancy formation and shifting the reaction pathway for OER. Our results provide critical insights into the role of lattice oxygen in determining the activity of (oxy)hydroxides and demonstrate tuning oxygen activity as a promising approach for constructing highly active electrocatalysts.

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Citation Format(s)

Activating lattice oxygen in NiFe-based (oxy)hydroxide for water electrolysis. / He, Zuyun; Zhang, Jun; Gong, Zhiheng et al.
In: Nature Communications, Vol. 13, 2191, 2022.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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