Iridium-Cluster-Implanted Ruthenium Phosphide Electrocatalyst for Hydrogen Evolution Reaction

Kyounghoon Jung, Dwi Sakti Aldianto Pratama, Andi Haryanto, Jin Il Jang, Hyung Min Kim, Jae Chan Kim, Chan Woo Lee, Dong Wan Kim

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Ruthenium phosphide is a promising catalyst for hydrogen evolution due to its cost-effectiveness compared to platinum. However it faces the challenge of having a high binding energy for hydrogen intermediates. In this study, we demonstrate that the incorporation of iridium in ruthenium phosphides lowers the binding energy of hydrogen intermediates, thereby controlling the overpotential and Tafel slope of hydrogen evolution. When the Ir content was doped at 3 at.%, the catalyst achieved an overpotential of 33 mV and a Tafel slope of 33 mV dec−1 under acidic conditions, which are similar to those of the benchmark Pt/C catalyst. In situ Raman spectroscopy and density functional theory (DFT) calculations suggest that the enhanced catalytic activity originates from the near-neutral Gibbs free energy of hydrogen adsorption on the hollow site of the iridium cluster implanted onto ruthenium phosphide. Graphical Abstract: (Figure presented.)

Original languageEnglish
Pages (from-to)158-169
Number of pages12
JournalAdvanced Fiber Materials
Volume6
Issue number1
DOIs
Publication statusPublished - 2024 Feb

Bibliographical note

Publisher Copyright:
© Donghua University, Shanghai, China 2023.

Keywords

  • Electronic structure
  • Electrospinning
  • Hydrogen evolution reaction
  • Iridium substitution
  • Ruthenium phosphide
  • Water electrolysis

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Science (miscellaneous)
  • Polymers and Plastics
  • Materials Chemistry

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