Dynamic hydrogen bubble templated NiCu phosphide electrodes for pH-insensitive hydrogen evolution reactions

Majid Asnavandi, Bryan H.R. Suryanto, Wanfeng Yang, Xin Bo, Chuan Zhao

Research output: Contribution to journalArticleResearchpeer-review

31 Citations (Scopus)

Abstract

A highly efficient porous NiCu-phosphide (NiCu-P) electrode is reported for a hydrogen evolution reaction (HER) in acidic, neutral, and basic electrolytes. The NiCu-P electrode was prepared via hydrogen bubbles dynamic templated electrodeposition of NiCu alloy onto nickel mesh, followed by phosphidation. Due to the synergistic interaction in NiCu-P, the material exhibits excellent HER activity in a wide pH range from 0.3-14. Current density of -10 mA cm -2 was achieved at low overpotentials of -226, -250, and -175 mV in 0.5 M H 2 SO 4 , 1 M phosphate buffer solution, and 1 M KOH, respectively. The fabricated NiCu-P electrode also shows an outstanding electrochemical stability, regardless of electrolyte pH. The NiCu-P has a slope value of -53 mV dec -1 , indicating that HER at NiCu-P follows the Heyrovsky mechanism in 1 M KOH.

Original languageEnglish
Pages (from-to)2866-2871
Number of pages6
JournalACS Sustainable Chemistry & Engineering
Volume6
Issue number3
DOIs
Publication statusPublished - 5 Mar 2018

Keywords

  • Bimetallic
  • Catalyst
  • Hydrogen evolution reaction mechanism
  • Neutral media
  • Water splitting

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