Kyoto University · 화학
메구미 무코요시 교수의 연구실은 금속-유기 프레임워크(MOFs)와 나노입자, 특히 플래티넘족 금속과 p-블록 원소를 포함한 다성분 나노합금을 중심으로 한 고성능 촉매 및 전도성 복합재료의 설계와 기초 물리화학적 이해를 목표로 합니다. 특히, 나노입자와 MOF의 상호작용, 전자구조 조절, 전기화학적 반응성 향상에 초점을 맞추며, EXAFS를 활용한 국소구조 분석을 통해 나노합금의 원자적 구조를 정량적으로 규명하고자 합니다. 이는 에너지 변환 및 저장 응용 분야에서의 실용적 응용을 견인하는 데 기여합니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Hybrid materials of metal-organic frameworks (MOFs) and nanoparticles (NPs) have attracted significant attention because of the wide variety of attractive properties derived from the two components. In the last decade, the development of synthesis techniques for NP/MOF composites was particularly significant. In the field of catalysis in particular, various synergistic effects that make the composites attractive catalysts have been reported. However, the role of MOFs in the composite catalysts i
Recently, mixed-metal metal-organic frameworks (MOFs) have been attracting much attention in various fields. In this study, we have systematically investigated the magnetic properties of Co<sub><i>x</i></sub>Ni<sub>1-<i>x</i></sub>-MOF-74 [Co<sub>2<i>x</i></sub>Ni<sub>2(1-<i>x</i>)</sub>(dhtp), where H<sub>4</sub>dhtp = 2,5-dihydroxyterephthalic acid] with two different kinds of metals (Co and Ni) across the composition range 0 ≤ <i>x</i> ≤ 1. Bimetallic Co<sub><i>x</i></sub>Ni<sub>1-<i>x</i></s
We report the synthesis of novel RuIn solid-solution alloy nanoparticles (NPs) via the electrochemical cleaning of RuIn@InOx NPs. By alloying In to Ru, the RuIn NPs exhibited enhanced hydrogen evolution reaction (HER) activity compared with monometallic face-centered cubic (fcc) Ru NPs. Furthermore, the HER activity of RuIn NPs was comparable to that of commercial Pt catalysts. At a current density of 10 mA cm–2, RuIn NPs displayed a lower overpotential of 30.7 mV compared to monometallic fcc Ru
We first report the facile synthesis of metal-carbon composites consisting of metal nanoparticles (NPs) and different types of carbon species: onion-like and amorphous carbon, Ni@onion-like carbon and Co@amorphous carbon. By simply changing the metal species in an isostructural metal-organic framework, thermal decompositions of MOF-74 directly afforded different types of metal NPs and carbon composites, which exhibited good electrical conductivity. In particular, the Ni@onion-like carbon, having
Alloy nanoparticles based on platinum group metals (PGMs) have been intensively investigated in various fields, especially in catalysis. Recently, the scope of alloying has expanded to include not only d‐block transition metals but also p‐block elements, which have a wide range of properties that are very different from those of d‐block transition metals. By alloying PGMs with p‐block elements, the electronic structure and surface properties of the catalysts can be tuned, enhancing their catalyt
We demonstrate physically consistent and interpretable extended X-ray absorption fine structure (EXAFS) curve-fitting analyses for estimating element-selective local structures in multielement alloy nanoparticles (MEA NPs). The difficulty in analyzing multielement systems originates from the too large number of independent structural parameters to fit, far exceeding the information content of the typical experimental data. Herein, this challenge is overcome by simultaneously fitting multiple dat
High-throughput synthesis of multi-element alloy nanoparticles (MEA NPs) is essential for accelerating the discovery of advanced materials with complex compositions. Herein, we developed an automated continuous-flow reactor system capable of synthesising a wide variety of MEA NPs under controlled solvothermal conditions (up to 400 °C and 35 MPa). The system demonstrates a high screening throughput, capable of preparing up to 20 distinct samples in a single, automated run, with each synthesis req
