Development of an Innovative Electrosynthesis Method of Diamond from Carbon Dioxide at Atmospheric Pressure
| Project/Area Number |
21K19024
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 36:Inorganic materials chemistry, energy-related chemistry, and related fields
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2021-07-09 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Keywords | ダイヤモンド / 二酸化炭素 / 電解合成 / 溶融塩 / 常圧 |
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| Outline of Research at the Start |
本研究は、これまで誰も成功したことがない「二酸化炭素を原料とした常圧ダイヤモンド合成」を実現しようとする挑戦的かつ極めて新規性の高い研究である。溶融LiCl-KCl中において、二酸化炭素と水からのダイヤモンド電解合成の原理実証、反応メカニズム解明および電解条件最適化のための方法論の確立を目指す。さらに、電流効率やエネルギー効率を計算・考察し、産業応用ポテンシャルを見極めることも実施する。
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| Outline of Final Research Achievements |
While high-pressure, high-temperature synthesis and gas-phase synthesis are well known as conventional diamond synthesis methods, there are no reports of synthesis from atmospheric pressure liquids. In this study, molten salt at 700°C was used as the electrolyte, and carbon dioxide and water were introduced as raw materials, followed by electrolysis at atmospheric pressure. The obtained samples were analyzed by Raman spectroscopy, and it was confirmed that diamond was synthesized. This study demonstrated the possibility of producing diamond, the ultimate high-value-added substance, in the socially demanded carbon dioxide fixation technology.
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| Academic Significance and Societal Importance of the Research Achievements |
常圧液体からのダイヤモンド合成はこれまで報告されておらず、学術的意義は極めて大きい。さらに、二酸化炭素を原料としたダイヤモンド直接合成も世界で初めての成果であり、こちらも学術的意義が極めて大きい。さらに、本成果は、カーボンニュートラル社会を実現するために社会的要請の高い二酸化炭素固定化技術において、ダイヤモンドという究極の高付加価値物質を生産する可能性を示した点でも、特筆すべきものである。
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Report
(3 results)
Research Products
(4 results)
