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First hexagonal close packed high-entropy alloy with outstanding stability under extreme conditions and electrocatalytic activity for methanol oxidation / Kirill Yusenko; Sephira Riva; Patricia A. Carvalho; Maria V. Yusenko; Serena Arnaboldi; Aleksandr S. Sukhikh; Michael Hanfland; Sergey A. Gromilov

Scripta Materialia, Volume: 138, Pages: 22 - 27

Swansea University Author: Kirill, Yusenko

Abstract

High-entropy alloys containing 5 and 6 platinum group metals have been prepared by thermal decomposition of single-source precursors non requiring high temperature or mechanical alloying. The prepared Ir0.19Os0.22Re0.21Rh0.20Ru0.19 alloy is the first example of a single-phase hexagonal high-entropy...

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Published in: Scripta Materialia
ISSN: 1359-6462
Published: 2017
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa33919
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Abstract: High-entropy alloys containing 5 and 6 platinum group metals have been prepared by thermal decomposition of single-source precursors non requiring high temperature or mechanical alloying. The prepared Ir0.19Os0.22Re0.21Rh0.20Ru0.19 alloy is the first example of a single-phase hexagonal high-entropy alloy. Heat treatment up to 1500 K and compression up to 45 GPa do not result in phase changes, a record temperature and pressure stability for a single-phase high-entropy alloy. The alloys show pronounced electrocatalytic activity in methanol oxidation, which opens a route for the use of high-entropy alloys as materials for sustainable energy conversion.
Keywords: High-entropy alloys; X-ray diffraction; Platinum group alloys; Electrochemistry
College: College of Engineering
Start Page: 22
End Page: 27