Improvement of recycling of precious metal catalysts combined with oxides

• Project/Area Number: 15K14192
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Metal making/Resorce production engineering
• Research Institution: The University of Tokyo
• Principal Investigator: Maeda Masafumi 東京大学, 生産技術研究所, 教授 (70143386)
• Co-Investigator(Kenkyū-buntansha): 佐々木 秀顕 愛媛大学, 理工学研究科(工学系), 講師 (10581746)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
• Keywords: 貴金属触媒

Outline of Final Research Achievements

Reactions between platinum oxide and cerium oxide were investigated in order to discuss behaviors of precious metal catalysts under oxidizing conditions at high temperatures. Experiments were carried out with reference to a synthesis method of Adam’s catalyst, which was formed in molten nitrate. Platinum and cerium oxides were co-precipitated in molten nitrate, and the reaction products were characterized. SEM observation and XRD analysis indicated that the platinum oxide dissolved in the cerium oxide and became more stable at high temperatures compared to an isolated platinum oxide.