High Entropy Alloy (HEA) Catalysts and of Super HEA Nanoparticles by Multivariate Analysis

2024 Fiscal Year Final Research Report

• Project/Area Number: 21H01762
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 28030:Nanomaterials-related
• Research Institution: Kyoto University
• Principal Investigator: Kusada Kohei 京都大学, 白眉センター, 特定准教授 (50741857)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: ハイエントロピー / 合金 / ナノ粒子 / 触媒

Outline of Final Research Achievements

In this proposal, we challenged the development of innovative catalysts for high-entropy alloy (HEA) nanoparticles, a new type of alloy consisting of five or more elements in equal molar proportions, based on an efficient material search method using multivariate analysis. Furthermore, we aimed to realize ultra-high-entropy alloy (UHEA) nanoparticles with an unprecedented mixture of more than 20 elements at the atomic level. As a result of the research, it was found that, as initially hypothesized, efficient optimization of HEA catalysts was achieved through machine learning. While synthesis of 20-element HEAs was not achieved, synthesis of UHEA consisting of a world-record 15 elements was successful.

Free Research Field

ナノ材料化学

Academic Significance and Societal Importance of the Research Achievements

本研究開発により、高活性と高耐久性を有した触媒の開発や、従来のナノ合金では達成されなかった複雑な反応ステップを介する高難度反応を促進する触媒開発が行えると期待される。本研究目標が達成されることで、多元素が混合した際に発現される相互作用の理解が進むと共に、これまで以上に自在に元素を用いて新物質開発が行えるようになり、既存物質では達成されていない高難度反応に向けた高性能触媒などの開発のきっかけになると考えられる。