大阪大学 · Chemistry
Koji Miyake 교수의 연구실은 나노스케일 자기소재와 촉매재료의 설계 및 응용을 핵심으로 삼고 있습니다. 특히, 나노접촉 구조를 통한 도메인 월드 제어와 자기저항 특성 분석을 바탕으로 고성능 스핀트로닉스 소자에 응용 가능한 신소재를 개발하고 있으며, 동시에 메탄, 프로판, 메탄올 등의 저탄소 자원을 효율적으로 변환하는 촉매 시스템을 개발하고 있습니다. 특히, ZSM-5/실리칼라이트 계 코어-쉘 구조 촉매나 게르마늄 도핑을 통한 산성도 제어를 통해 선택성과 내구성을 향상시키는 연구가 두드러집니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
A nanocontact structure (typically 22×34 nm2) between two NiFe wires was fabricated by an electron-beam lithography and a lift-off method, and the magnetoresistance was measured. The magnetization switching process was artificially controlled by engineering the sample geometry to realize a magnetic structure with a single domain wall (DW) trapped in the nanocontact area. This domain structure was confirmed by magnetic force microscopy observations. The magnetization rotation of 180° was realized
Fe-MFI nanocrystals were synthesized by a dry gel conversion method and showed superior catalytic performance in methanol to olefin reactions.
Propane was found to be dehydrogenated over the Brønsted acid sites derived from incorporated Ga in the 12-membered large micropores of a *BEA-type structure.
Abstract Core‐shell zeolite composite crystals consisting of an MFI structure were prepared by a zeolite overgrowth method. The core and shell zeolites are ZSM‐5 with acid sites and silicalite‐1 (Al‐free MFI zeolite) without acid sites, respectively. The structured core‐shell ZSM‐5/silicalite‐1 catalyst was used for the reactions to produce benzene, toluene, and p ‐xylene (BT p X) from five C 1‐3 feedstocks. The selectivity to total BT p X on ZSM‐5/silicalite‐1 (47‐71 C‐mol%) was much higher tha
Incorporating Ge into the aluminophosphate framework generated weakened Brønsted acid sites, leading to prolonged catalyst lifetimes in the MTO reaction.
Dry reforming of methane (DRM) is an endothermic reaction that consumes energy during operation. In Ni-based catalysts, carbon produced by side reactions leads to catalyst deactivation and damage to the reactor tube. We have developed a catalyst that maintains its activity and suppresses carbon deposition at a low temperature (873 K). New catalysts were synthesized by loading Cr and Ni onto dealuminated β zeolites. The peak shifts in the X-ray diffraction (XRD) measurements suggested that the in
