Cu2S/Ni3S2 ultrathin nanosheets on Ni foam as a highly efficient electrocatalyst for oxygen evolution reaction

Mengyi Tang, Yu Liu, Heng Cao, Qiaoji Zheng, Xijun Wei, Kwok Ho Lam, Dunmin Lin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

3 Citations (Scopus)

Abstract

It is an inevitable choice to find efficient and economically-friendly electrocatalysts to reduce the high overpotential of oxygen evolution reaction (OER), which is the key to improve the energy conversion efficiency of water splitting. Herein, we synthesized Cu2S/Ni3S2 catalysts on nickel foam (NF) with different molar ratios of Ni/Cu by a simple two-step hydrothermal method. Cu2S/Ni3S2-0.5@NF (CS/NS-0.5@NF) effectively reduces the overpotential of OER, displaying small overpotentials (237 mV@100 mA cm−2 and 280 mV@500 mA cm−2) in an alkaline solution, along with a low Tafel slope of 44 mV dec−1. CS/NS-0.5@NF also presents an excellent durability at a relatively high current density of 100 mA cm−2 for 100 h. The excellent performance is benefited by the prominent structural advantages and desirable compositions. The nanosheet has a high electrochemical active surface area and the porous structure is conducive to electrolyte penetration and product release. This work provides an economically-friendly Cu-based sulfide catalyst for effective electrosynthesis of OER.

Original languageEnglish
Pages (from-to)3013-3021
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume47
Issue number5
DOIs
Publication statusPublished - 15 Jan 2022

Keywords

  • CuS/NiS
  • Nanosheets
  • Non-noble metal catalysts
  • Oxygen evolution reaction

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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