東京工業大学 · エネルギー
Yamaguchi教授の研究室では、酸化マンガンを用いた水酸化反応のプロトン結合電子移動機構の制御や、高温耐性材料における自己修復機構の解明を進めています。特に、中性pHでも効率的な酸素発生を実現するバイオインスパイアド触媒の開発や、炭素含有耐火物の自己修復挙動のメカニズム解明が主な研究テーマです。また、アルミナシリカカルバイト（Al₄SiC₄）の合成と耐水性評価を通じて、次世代耐火材料の開発にも貢献しています。
Figures are computed from collected data and may differ slightly.
Manganese oxides have been extensively investigated as model systems for the oxygen-evolving complex of photosystem II. However, most bioinspired catalysts are inefficient at neutral pH and functional similarity to the oxygen-evolving complex has been rarely achieved with manganese. Here we report the regulation of proton-coupled electron transfer involved in water oxidation by manganese oxides. Pyridine and its derivatives, which have pKa values intermediate to the water ligand bound to mangane
Self‐repairing function is observed in carbon‐containing refractory such as MgO–C, Al 2 O 3 –C, and so forth. Non‐oxides such as pure metallic, alloys, carbides, and nitrides are intentionally added to the refractory composition to bring about this function. As a basis of the development of a self‐repairing refractory, the self‐repairing mechanism in the carbon‐containing refractory is described.
The synthesis process and the formation mechanism of Al4SiC4 were investigated using Al, Si, and C as starting materials. Properties such as hydration resistance of the synthesized Al4SiC4 were examined. SiC and Al4C3 begin to form from about 800°C and 900°C, respectively. When the temperature is above 1300°C, both products further react with each other to form Al4SiC4. With increasing temperature and time, the formation ratio of Al4SiC4 increases. The addition of Al2O3 can facilitate the format
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