Nagoya University · 화학
Chandan Chaudhari 교수의 연구실은 주로 고분자 촉매 및 나노촉매를 활용한 탄소-탄소 결합 형성, 탈수소화 반응, 수소화 반응 등 유기합성 반응의 효율적이고 지속 가능한 공정 개발을 주요 연구 방향으로 삼고 있습니다. 특히, 백금, 팔라듐, 루테니움, iridium 등의 귀금속 나노촉매를 산화물 기반 지지체에 고르게 분산시켜 반응성과 재사용성을 극대화하는 연구를 진행하고 있으며, 첨가제가 없는 반응 조건에서도 높은 선택성과 활성을 확보하고 있습니다. 이는 환경 친화적인 촉매 시스템 개발의 핵심 과제를 해결하고자 하는 연구 철학을 반영합니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Pt-loaded CeO<sub>2</sub> acted as an effective and recyclable catalyst for alkylation of oxindole with alcohols under additive-free conditions.
CeO2-supported Pt nanoparticle catalysts enabled the acceptorless dehydrogenative synthesis of 2-substituted quinazolines from 2-aminobenzylamine with aliphatic and benzyl primary alcohols or aldehydes with low catalyst loading, wide substrate scope and good catalyst reusability, demonstrating the first acceptor-free and additive-free catalytic system for this reaction.
Recyclable Ir-PVP catalyzed one-pot syntheses of pyrrolidones were achieved under mild reaction conditions.
Abstract Pr 2 O 3 supported Ru nanolayers and Ru nanoparticles catalysts were examined for the synthesis of quinolines. The Ru nanolayer was most active catalyst and showed a broad substrate scope. Structure‐activity relationship demonstrated that the metallic state and morphology of Ru as well as the basic site of Pr 2 O 3 were indispensable factors of this catalytic system.
Monometallic (Pd, Ru or Rh) and bimetallic (Pd<sub>0.5</sub>-Ru<sub>0.5</sub>) alloy NPs catalysts were examined for the hydrogenation of quinoline. Pd-Ru alloy catalyst showed superior catalytic activity to the traditional Rh catalyst. The characterization of Pd<sub>0.5</sub>-Ru<sub>0.5</sub> catalysts, HAADF-EDX mapping and XPS analysis suggested that the alloy state of PdRu catalysts remained unchanged in the recovered catalyst. Furthermore, the catalyst was highly selective for the hydrogena
The direct synthesis of cyclohexylamine <italic>via</italic> hydrogenation of nitrobenzene over monometallic (Pd, Ru or Rh) and bimetallic (Pd<sub>x</sub>Ru<sub>1−x</sub>) catalysts was studied.
Abstract Supported Ru catalysts were prepared by using different Ru precursors and examined for the hydrogenation of benzaldehyde to CHM. The catalyst prepared from Ru 3 (CO) 12 precursor and HT support exhibited high yield of CHM. Moderate acidic and basic nature of HT was favourable to control the selectivity for CHM. The physicochemical properties analysis revealed that highly dispersed Ru nanoparticles were effective for the hydrogenation of benzaldehyde. Ru CO /HT catalyst was tolerant to d
Ni/CeO2 catalysts was prepared using different Ni precursors and examined for nitrogen oxide to ammonia reaction. The catalyst prepared from nickel acetate showed higher activity than that of other Ni precursors. The physiochemical properties and catalytic activity of these catalysts revealed that nickel acetate precursor was highly dispersed on the surface of CeO2 and showed strong metal-support interactions which may be responsible for high catalytic activity.
Abstract Colloidal metal nanoparticles were examined for reductive amination of phenol by ammonia under mild reaction conditions. The results showed that Rh-PVP was the most active catalyst for reductive amination reaction. Linear, cyclic, and amino alcohols were used as nucleophiles and converted to primary/secondary/tertiary amines. Using this strategy, the synthesis of an industrially important chemical, N-cyclohexyl-2-pyrrolidone was explored.
Abstract The effect of drying conditions on the physicochemical and catalytic properties of TiO 2 were examined for NO to ammonia reaction. TiO 2 prepared by different drying conditions such as evaporation (EP), evaporation under reduced pressure (ER) and evaporation under freeze drying conditions (EF) was used for support for Pt loading. At low temperature (below 175 °C), the order for ammonia formation was Pt/TiO 2 (ER)>Pt/TiO 2 (EP)>Pt/TiO 2 (EF). Notably, Pt/TiO 2 (ER) catalyst was mor
