An industry-applicable hybrid electrode for large current density hydrogen evolution reaction

Denghe Gao, Jianwei Ren, Hui Wang, Xuyun Wang, Yong Liu, Rongfang Wang

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

The performance evaluation on water splitting electrodes is usually conducted in laboratory at current density range of 10–100 mA cm−2, and this is far from satisfactory for the industrial practices that require the operating current density larger than 400 mA cm−2. In this work, an efficient hybrid electrode is developed by firstly electro-etching the nickel mesh (E-NM) in actual seawater and then in-situ depositing nickel nanowires (NWs) onto E-NM substrate under the externally applied magnetic field. The results show that NWs are integrated into the defective E-NM structure. The assembled NWs/E-NM hybrid electrode achieves a high current density of 800 mA cm−2 at 2.0–2.1 V, which outperforms the commercial NM electrode. Moreover, the current density does not decay after 100 h stability test at 500 mA cm−2.

Original languageEnglish
Article number230635
JournalJournal of Power Sources
Volume516
DOIs
Publication statusPublished - 31 Dec 2021

Keywords

  • Hybrid electrode
  • Hydrogen evolution reaction
  • Large current density
  • Nickel nanowires
  • Seawater electro-etching

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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