Synthesis of Perovskite Nanostructures by Precursor Accumulation Method and Their Application to Electrolysis Processes

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H01710
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 27030:Catalyst and resource chemical process-related
• Research Institution: Saitama University
• Principal Investigator: Ogihara Hitoshi 埼玉大学, 理工学研究科, 教授 (60452009)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: ペロブスカイト / ナノ材料 / 電極触媒 / 酸素発生反応

Outline of Final Research Achievements

In this study, the synthesis and application of perovskite nanostructures using the precursor accumulation method were investigated. A technique to uniformly accumulate precursors on nanocarbons was developed, and it was found that this technique can synthesize various perovskites with high surface areas. Depending on the morphology of the nanocarbon used, the nanostructure of the perovskites could be controlled, resulting in nanoparticles or nanofibers. Analysis of the mechanism of the precursor accumulation method revealed that the accumulation of heterogeneous metal precursors at the nanolevel on the carbon surface drives perovskite formation. Additionally, the electrocatalytic activity of NiFe(OH)x/C was evaluated, and it was found that in this composite hydroxide, Ni and Fe are closely positioned at the atomic level, resulting in high oxygen evolution reaction activity.

Free Research Field

触媒化学

Academic Significance and Societal Importance of the Research Achievements

本研究は，前駆体集積法を用いることで高表面積のペロブスカイトナノ構造体を効率的に合成できる新手法を確立した点に学術的意義がある。異種金属前駆体が炭素表面においてナノレベルで均一集積し，このナノ混合状態がペロブスカイト生成を促進するメカニズムを解明したことも成果として強調したい。また，原子レベルで分散した異種金属種（NiとFe）が高い酸素発生反応活性を示すことを実証し，これは電極触媒化学分野に対する新たな知見となる。本研究は，ナノペロブスカイトの簡便な合成法，およびグリーン水素の大量生産に寄与する可能性があり，社会的な波及効果が期待される。