A series of MnOx were prepared with four different precipitants and employed to catalyze the combustion of toluene with the aim to clarify the role of Mn³⁺, Mn⁴⁺, surface adsorbed oxygen and lattice oxygen. Lower crystallinities and better microstructures were observed on the catalysts prepared by carbonates, due to the lower nucleation rates. The co-existence of Mn³⁺ and Mn⁴⁺ was beneficial to the transfer and transformation of electrons, which promoted the redox performance of the catalyst. But various contents of Mn³⁺ and surface adsorbed oxygen species were found on the catalysts synthesized with different precipitants. By the improving of Mn³⁺, the binding capacity of the catalyst using (NH₄)₂CO₃ as precipitant (Mn-AC) to oxygen was weakened, thus increasing its oxygen mobility. Furthermore, more oxygen vacancies were produced, resulting in the generation of more active oxygen species on the surface of Mn-AC. Abundant adsorbed oxygen of Mn-AC enhanced the oxidation ability of lattice oxygen by the rapid supplement of consumed lattice oxygen species. Therefore, Mn-AC with excellent catalytic activity and durability is a promising industrial catalyst for efficient removal of toluene.

これまでベンゼンの酸素による液相酸化反応において、回分反応器にてバナジウム錯体を用いることで酸素加圧下、効率よくフェノールが生成することを報告してきた。このとき酸素圧を増加させることでフェノール生成活性が増加し、溶液中に溶解する酸素量がフェノール生成活性に影響を及ぼすことが明らかとなった。そこで本研究では、循環流による触媒を含む反応溶液と気体との接触界面の増加が見込まれるスラグ流を用いたベンゼンの液相酸化反応について詳細に検討した。

炭酸ストロンチウム担持ナトリウム修飾銀（Ag-Na/SrCO3）触媒へのUV-LED照射の影響を、プロピレンのプロピレンオキシドへの直接エポキシ化について検討した。Ag(56)-Na(1)/SrCO3（括弧内の数字は銀とナトリウムの重量パーセント負荷を示す）にUV-LEDを照射すると明らかにプロピレンオキサイドの選択率や収率が向上した。UV-LEDの照射により生ずる銀のプラズモン励起が活性改善に寄与して反応機構を示す。