Synthesis of Pt-based bimetallic nanoparticles with heterostructure for improvement of alcohol oxidation properties

2018 Fiscal Year Final Research Report

• Project/Area Number: 16K06861
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Catalyst/Resource chemical process
• Research Institution: Kobe City College of Technology
• Principal Investigator: KUGAI Junichiro 神戸市立工業高等専門学校, その他部局等, 准教授 (80617134)
• Co-Investigator(Kenkyū-buntansha): 中川 貴 大阪大学, 工学研究科, 招へい教授 (70273589) ; 清野 智史 大阪大学, 工学研究科, 准教授 (90432517)
• Research Collaborator: YAMAMOTO Takao ; TANAKA Shingo
• Project Period (FY): 2016-10-21 – 2019-03-31
• Keywords: ナノ粒子 / 構造 / 触媒 / 液相還元 / アルコール酸化 / 燃料電池

Outline of Final Research Achievements

Carbon-supported Pt-based bimetallic nanoparticles were prepared by a liquid-phase method using organic stabilizer additives for controlling the structure and composition of the nanoparticles. Even with 20-30 wt% of high platinum loading, platinum or platinum-based alloy nanoparticles of 1-2 nm in diameter highly dispersed on carbon support were obtained by adding long chain carboxylates or phosphinate. Understanding of the protection mechanism of small particles with stabilizer was deepened by computer simulation. Phosphinate-protected catalyst showed high oxidation current at a potential region of intermediate oxidation of 2-propanol while copper addition to platinum tended to show high current at the potential region of dehydrogenation of 2-propanol. These results help designing an effective catalyst.

Free Research Field

工学

Academic Significance and Societal Importance of the Research Achievements

20～30 重量%の高い白金担持量で1～2 nmの白金または合金粒子を炭素上に高分散させる手法を見出したことは実用面での進歩である。各種の保護剤が白金表面に吸着し粒子を保護する現象を実験と理論(量子計算)の両面から探る手法は本研究の独創的な点であり、粒子保護のメカニズムに関する物理化学的な理解が進んだ。また、異なる保護剤を利用して得られる白金系ナノ粒子を用いて構造とアルコール酸化の素反応の特性を関係付けることができた。