Develpoment and evaluation of highly durable and active electrocatalyst for fuel cell based on the controlling the interface between support and noble metal

2022 Fiscal Year Final Research Report

• Project/Area Number: 20H02839
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 36020:Energy-related chemistry
• Research Institution: University of Yamanashi
• Principal Investigator: KAKINUMA KATSUYOSHI 山梨大学, 大学院総合研究部, 特任教授 (60312089)
• Co-Investigator(Kenkyū-buntansha): 内田 誠 山梨大学, 大学院総合研究部, 教授 (10526734)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 固体高分子形燃料電池 / カソード / 電極触媒 / 酸素還元活性 / ナノ粒子 / 自己組織化 / 耐久性 / 酸化物ナノ粒子

Outline of Final Research Achievements

Self-assembly of precious group metal nanoparticles was invented on the electrical conducting oxide nanoparticles by use of the crystal arrangement at the interface between precious group metal and oxide. The growth of active crystal plane and morphology for the precious metal nanoparticles was controlled by the effect of self-assembly. The difference of electronic state of the precious metal nanoparticles on the electrical conducting oxide nanoparticles was confirmed by the X-ray photoemission spectroscopy etc. The electrical conductivity of self-assembled precious group metal nanoparticles on the electrical conducting oxide nanoparticles reached to that of metallic materials. The oxygen reduction reaction of these catalysts was more than three times larger than that of commercial Pt catalyst supported on carbon. The durability at high potential region of the invented catalyst was more than 1000 times larger than that of commercial one.

Free Research Field

電気化学

Academic Significance and Societal Importance of the Research Achievements

ナノテクノロジーを積極的に利用して高い活性と耐久性を有する新しい電極触媒を開発し、カーボンニュートラルに不可欠な燃料電池や水素製造装置の性能向上に貢献した。これまで困難であった貴金属ナノ粒子の形状等を自在に制御できるようになったことが新たな成果であり、その技術を積極的に利用することで、市販触媒に比べ3倍以上高い活性と1000倍以上の大幅な耐久性向上に成功した。