Fabrication of Ni sandwich-type catalysts using hollow spheres and their catalytic reduction properties

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K14665
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 34030:Green sustainable chemistry and environmental chemistry-related
• Research Institution: Nihon University
• Principal Investigator: TOYAMA Naoki 日本大学, 生産工学部, 助教 (60845410)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 球状中空体 / ニッケル / 還元反応 / 水素生成

Outline of Final Research Achievements

In this study, silica hollow spheres controlled with microstructures such as shell thickness and particle size were synthesized, and nickel was supported on the silica hollow spheres by the impregnation method. From this result, nickel supported on silica hollow spheres with a thinner shell thickness and smaller particle size showed high activity　for reduction reaction of 4-nitrophenol. Although further silica coating nickel supported on silica hollow spheres was carried out, nickel was buried in the silica layer and/or heterogeneous silica coating, leading to decrease the activity. Based on these results, the durability and hydrogen generation were evaluated using the supported nickel catalysts with high activity. In the durability test, the catalyst showed high activity up to the fourth cycle and could be evaluated with a gas burette for hydrogen.

Free Research Field

環境材料化学

Academic Significance and Societal Importance of the Research Achievements

規則性構造体の一つである球状中空体を触媒の担体として利用し、このとき中空壁厚や粒径を制御させた。微細構造制御した球状中空シリカにNiを担持させた触媒を4-ニトロフェノールの還元反応で評価することによって得られたデータを系統的に整理することで新たな知見を得ることができた。
さらに、高活性を示した球状中空シリカ担持Ni触媒の耐久性の評価に加えて、水素生成反応への二機能的活用にも成功したことは非常に重要な研究成果である。