Design and Mechanistic Study of Highly Durable Carbon-Coated Cobalt Diphosphide Core-Shell Nanostructure Electrocatalysts for the Efficient and Stable Oxygen Evolution Reaction

Merfat M. Alsabban, Xiulin Yang, Wandi Wahyudi, Jui Han Fu, Mohamed N. Hedhili, Jun Ming, Chih Wen Yang, Muhammad A. Nadeem, Hicham Idriss, Zhiping Lai, Lain Jong Li*, Vincent Tung, Kuo Wei Huang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

The facile synthesis of hierarchically functional, catalytically active, and electrochemically stable nanostructures holds a tremendous promise for catalyzing the efficient and durable oxygen evolution reaction (OER) and yet remains a formidable challenge. Herein, we report the scalable production of core-shell nanostructures composed of carbon-coated cobalt diphosphide nanosheets, C@CoP2, via three simple steps: (i) electrochemical deposition of Co species, (ii) gas-phase phosphidation, and (iii) carbonization of CoP2 for catalytic durability enhancement. Electrochemical characterizations showed that C@CoP2 delivers an overpotential of 234 mV, retains its initial activity for over 80 h of continuous operation, and exhibits a fast OER rate of 63.8 mV dec-1 in base.

Original languageEnglish (US)
Pages (from-to)20752-20761
Number of pages10
JournalACS Applied Materials and Interfaces
Volume11
Issue number23
DOIs
StatePublished - Jun 12 2019

Bibliographical note

Publisher Copyright:
© 2019 American Chemical Society.

Keywords

  • carbon coating
  • cobalt diphosphide
  • electrochemical catalyst
  • oxygen evolution reaction (OER)
  • phosphidation

ASJC Scopus subject areas

  • General Materials Science

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