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Experimental study platform for electrocatalysis of atomic-level controlled high-entropy alloy surfaces

Author

Listed:
  • Yoshihiro Chida

    (Tohoku University)

  • Takeru Tomimori

    (Tohoku University)

  • Tomoaki Ebata

    (Tohoku University)

  • Noboru Taguchi

    (National Institute of Advanced Industrial Science and Technology)

  • Tsutomu Ioroi

    (National Institute of Advanced Industrial Science and Technology)

  • Kenta Hayashi

    (Tohoku University)

  • Naoto Todoroki

    (Tohoku University)

  • Toshimasa Wadayama

    (Tohoku University)

Abstract

High-entropy alloys (HEAs) have attracted considerable attention to improve performance of various electrocatalyst materials. A comprehensive understanding of the relationship between surface atomic-level structures and catalytic properties is essential to boost the development of novel catalysts. In this study, we propose an experimental study platform that enables the vacuum synthesis of atomic-level-controlled single-crystal high-entropy alloy surfaces and evaluates their catalytic properties. The platform provides essential information that is crucial for the microstructural fundamentals of electrocatalysis, i.e., the detailed relationship between multi-component alloy surface microstructures and their catalytic properties. Nanometre-thick epitaxially stacking layers of Pt and equi-atomic-ratio Cr-Mn-Fe-Co-Ni, the so-called Cantor alloy, were synthesised on low-index single-crystal Pt substrates (Pt/Cr-Mn-Fe-Co-Ni/Pt(hkl)) as a Pt-based single-crystal alloy surface model for oxygen reduction reaction (ORR) electrocatalysis. The usefulness of the platform was demonstrated by showing the outperforming oxygen reduction reaction properties of high-entropy alloy surfaces when compared to Pt-Co binary surfaces.

Suggested Citation

  • Yoshihiro Chida & Takeru Tomimori & Tomoaki Ebata & Noboru Taguchi & Tsutomu Ioroi & Kenta Hayashi & Naoto Todoroki & Toshimasa Wadayama, 2023. "Experimental study platform for electrocatalysis of atomic-level controlled high-entropy alloy surfaces," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-40246-5
    DOI: 10.1038/s41467-023-40246-5
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