Structure control of noble metal nanoparticle catalyst by self-organization process using water

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K05159
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 27030:Catalyst and resource chemical process-related
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: Tomita Atsuko 国立研究開発法人産業技術総合研究所, 材料・化学領域, 主任研究員 (70392636)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 貴金属触媒 / ナノ粒子 / 構造制御 / 界面形成 / 水処理

Outline of Final Research Achievements

The purpose of this study is to control the structure of metal nanoparticles by self-organization process during catalyst treatment with water under moderate conditions. Our strategy is based on the enhancement of the mobility of Pt species by water on support surface. The effect of Ce doping and water treatment on Pt sintering at high temperature was studied for Pt/Al2O3 catalysts. A small amount of Ce doping and water treatment of Pt/Al2O3 inhibited the Pt sintering caused by ageing and lowered the propane oxidation temperature. The reduction temperature of Ce species on water-treated catalysts was lower than that of untreated catalysts, probably owing to a stronger interaction between Pt and Ce. The increased reducibility of Ce species may be the reason for the improved oxidation activity of the catalysts.

Free Research Field

触媒の構造と反応

Academic Significance and Societal Importance of the Research Achievements

貴金属担持触媒は様々な用途に有用であるが、貴金属は高価であり供給元が偏在しているために、より少量での高活性化が必要である。そのためには、活性金属の構造を高度に制御することが有効である。本研究の触媒構造制御方法は、水を利用し比較的低温の熱処理で貴金属を移動させる、低環境負荷な方法である。反応機構を解明したことは学術的に重要である。また、本研究での検討により各種貴金属への適用も期待できる。