Development of innovative catalytic systems based on the construction of multifunctional active sites and deepening of their science

2022 Fiscal Year Final Research Report

• Project/Area Number: 20H02517
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 27030:Catalyst and resource chemical process-related
• Research Institution: Hokkaido University
• Principal Investigator: Furukawa Shinya 北海道大学, 触媒科学研究所, 准教授 (10634983)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 擬二元系合金 / 金属間化合物 / ハイエントロピー / 触媒

Outline of Final Research Achievements

In this study, we have demonstrated that partial substitution of either or both of the A and B sites of the binary intermetallic compound AmBn by a close element in the periodic table can be extended to a quasi-binary alloy represented by (A1-xA'x)mBn or (A1-x-yA'xA''y)m(B1-p-qB'pB''q)n, thereby dramatically improving catalytic performance. Specifically, they succeeded in developing a group of catalysts that exhibit extremely high performance, including the world's highest, in reaction systems such as methylcyclohexane and propane dehydrogenation, NOx reduction, and propane oxidation dehydrogenation using CO2. In particular, those with multi-element substitutions on both sites are called high-entropy intermetallic compounds, and have shown extremely high novelty in terms of materials.

Free Research Field

触媒化学

Academic Significance and Societal Importance of the Research Achievements

最近、ハイエントロピー合金（high-entropy alloy: HEA, ５元素以上からなる固溶体合金）が構造材料分野を中心に、触媒も含めた様々な分野で注目されてきている。一方でHEAは固溶体合金であるため原子の配列はランダムであり、触媒反応場の精密設計に不可欠な秩序構造を基本的に持たない。この点において我々が切り拓いたHEIの触媒化学は、現在の先進研究のさらに先を行く最新鋭の研究分野であり、なおかつ産学に対する影響力も極めて大きい。特にCO2を用いたプロパン酸化脱水素は化石資源によるプロピレン製造をカーボンニュートラル化できるため、Net Zero 2050に対する貢献も計り知れない。