NiFe-layered double hydroxide arrays for oxygen evolution reaction in fresh water and seawater

Guofa Dong, Fengyan Xie, Fangxia Kou, Tingting Chen, Fengyun Wang, Yingwu Zhou, Kechen Wu, Shaowu Du, Ming Fang, Johnny C. Ho

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

The development of active, durable, and cost-effective electrocatalysts for the oxygen evolution reaction (OER) is crucial for viable hydrogen production from water by electrolysis. In this work, we report a mild, atmospheric pressure-based chemical method for the synthesis of NiFe-containing layered double hydroxide (LDH) nanosheet arrays on a carbon fiber cloth (CC). The obtained NiFe-LDH/CC composites with various Ni/Fe ratios show good performance for OER in alkaline aqueous solutions. Among them, the sample with a Ni/Fe ratio of 6:4 exhibits the best OER activity with overpotential values of only 226 mV in water and 238 mV in seawater at a current density of 10 mA cm−2, which are much lower than those of the benchmarking RuO2 catalyst. The catalytic activity can be maintained for at least 450 h for OER in fresh water and 165 h in seawater at a current density of 100 mA cm−2.

Original languageEnglish
Article number100883
JournalMaterials Today Energy
Volume22
DOIs
Publication statusPublished - Dec 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science (miscellaneous)
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

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