Surface control and functionalization of nanoparticles by plasma-gas-condensation process

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K05139
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 27020:Chemical reaction and process system engineering-related
• Research Institution: Nagoya Institute of Technology
• Principal Investigator: Hihara Takehiko 名古屋工業大学, 工学(系)研究科(研究院), 教授 (60324480)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: ナノ粒子 / 固体高分子形燃料電池 / 触媒 / ナノコンポジット / 交換結合 / 磁性 / 磁石

Outline of Final Research Achievements

(1)The purpose of this study was to create a Pt-less fuel cell electrode catalyst. Using a plasma-gas-condensed cluster deposition apparatus, we have produced Ni/Re, Co/Re, Pt/TiO2, and Pt/Gd composite nanoparticles. Then, we have investigated the catalytic performance of those nanoparticles as a cathode catalyst for polymer electrolyte fuel cells.
(2)In order to create an exchange spring magnet, we have prepared FePt/Fe-Al, FePt/Fe-B, and (Fe-Co)Pt/Fe-Co nanocomposite films and their magnetic properties have been evaluated. Furthermore, induced magnetic anisotropy was imparted by heat treatment in a magnetic field to improve the magnetic properties of these samples, and ionized particles were deposited on a biased substrate by accelerated deposition of soft magnetic and hard magnetic particles to control exchange coupling between them.

Free Research Field

金属材料学

Academic Significance and Societal Importance of the Research Achievements

固体高分子形燃料電池の電極触媒の白金使用量削減を目標とした。Ni-Re合金ナノ粒子は、比較的高い最大電力密度を示し白金代替触媒として有望である。Pt/GdはPtに匹敵する触媒機能を示し、Pt使用量削減の観点で重要な成果を得た。
また、次世代永久磁石の創製を目的として、ナノコンポジット磁石の研究を実施した。(Fe-Co)Pt/Fe-Coナノコンポジット膜では、バイアス印加基板にナノ粒子を加速堆積させることで、磁性粒子間の交換結合の制御に成功した。このときの最大エネルギー積は3.86 MGOeで、ネオジム磁石の10％程度であったが、酸化の抑制とバイアス電圧の最適化により、磁気特性の向上が可能である。