Photothermal CO2 conversion over supported metal nanoparticle catalysts under visible and near infra-red irradiation and visualization of the temperature of the reaction field

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H01975
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 34030:Green sustainable chemistry and environmental chemistry-related
• Research Institution: Kyoto University
• Principal Investigator: Yamamoto Akira 京都大学, 人間・環境学研究科, 助教 (30769443)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 光熱変換 / 温度計測 / 二酸化炭素 / 金属ナノ粒子触媒 / 太陽光エネルギー / メタン / 改質反応 / X線吸収分光

Outline of Final Research Achievements

Conversion and utilization of CO2 using catalysis is a crucial technology to control the emission of CO2 and recycle CO2 as a carbon source. In the present study, we developed catalysts for dry reforming of methane using photothermal heating and a temperature measurement method during the photothermal reaction through X-ray absorption spectroscopy. For the performance, we developed the supported nickel catalysts for the photothermal dry reforming with enhanced catalytic activity and improved resistance for coke formation and sintering of catalytically active metal nanoparticles. Additionally, we successfully obtained the temperature of the supported metal nanoparticles inside the glass reactor under visible/near-IR light irradiation during the photothermal catalytic reaction with high time resolutions using dispersive X-ray absorption spectroscopy.

Free Research Field

触媒化学

Academic Significance and Societal Importance of the Research Achievements

研究成果は，光加熱型のメタンドライリフォーミングのための触媒開発の指針となるものであり，高活性と高耐久性を実現する新規触媒材料開発に繋がるものであると期待される．材料以外の観点でも得られた知見はリアクターや反応条件などを含む触媒システム開発にも有益な情報である．また，反応中の触媒温度は触媒性能の理解に必須の情報のため本研究で開発した解析法を含めた温度計測手法は今後の光加熱型の反応系開発において学術および実用面の発展のための基盤的な技術となるものである．