News
2022/06/13
2022/06/13
Estimation of the spatial distribution of carbon edge sites in a carbon structure using H2 desorption kinetics in temperature programmed desorption https://doi.org/10.1016/j.carbon.2022.06.006 This study aims to elucidate the role of hydrogen desorption profiles obtained through temperature programmed desorption (TPD) analysis of carbon materials for revealing their carbon edge sites. Accordingly, the H2 desorption profiles of several carbon materials, such as activated carbon, carbon black, reduced graphene oxide (rGO), phenol resin carbon, graphite, high-temperature treated carbon, and carbo...続きを読む »
2022/05/03
2022/05/03
Modulation of the electronic state of carbon thin films by inorganic substrates https://www.sciencedirect.com/science/article/pii/S0008622322003578?via%3Dihub The control of the electronic states of carbon-based materials is of great importance for the widespread use of carbon materials as electronic devices and catalysts. This article reports a novel method of controlling the electronic states of carbon-based materials by establishing covalent bonds between inorganic support materials and carbon thin films. Carbon thin films of 1 nm thickness were grown on inorganic substrates (Al2O3, Al...続きを読む »
2022/01/07
2022/01/07
Preparation of Chemically Structure-Controlled BN-Doped Carbons for the Molecular Understanding of Their Surface Active Sites for Oxygen Reduction Reaction https://pubs.acs.org/doi/abs/10.1021/acscatal.1c04806 BN-doped carbons have been reported to exhibit higher oxygen reduction reaction (ORR) activities than single-atom-doped carbons. However, the structures of these BN-doped carbons as well as the mechanism underlying their catalytically active sites had not been elucidated. In the BN-doped carbons reported so far, B and N exist in a disordered manner within the carbon structure. Therefore,...続きを読む »
2021/09/09
2021/09/09
ギャラリー,About(研究室について)を更新しました.HPのレイアウト等のデザインも適宜修正中ですので,表示が崩れている場合は,時間をおいてアクセスしてみて下さい. 管理人 石井...続きを読む »
2021/08/20
Diamond and Related Materialsに研究成果が掲載されました
2021/08/20
Benzene hydrogenation activities of Ni catalyst supported on N- and B-doped carbons https://www.sciencedirect.com/science/article/pii/S0925963521003137?via%3Dihub A catalyst support can improve the catalytic activity of metal catalysts, and this phenomenon is well known as the support effect. The effective use of this support effect is considered important for improving catalytic activity. However, the factors affecting this phenomenon are complex. It is, therefore, important to understand the interaction between the support and metal catalyst as well as the surface characteristics of the supp...続きを読む »
2021/07/06
2021/05/24
2021/05/24
Direct conversion of lignin to high-quality graphene-based materials via catalytic carbonization https://pubs.rsc.org/en/content/articlelanding/2021/RA/D1RA02491D#!divAbstract Methods for effectively utilizing lignin are necessary for the realization of a sustainable society. Herein, we report a method for directly converting lignin to graphene-based materials. Fe-supported lignin is prepared by dissolving lignin in an aqueous FeCl2 solution, followed by freeze drying. Graphene is then produced by catalytically carbonizing this Fe-supported lignin at 1200 °C. The characteristics of both the Fe...続きを読む »
2020/11/28
2020/11/28
Quantitative analysis of the formation mechanism of tightly bound rubber by using carbon-coated alumina nanoparticles as a model filler https://www.sciencedirect.com/science/article/pii/S0008622320311532?via%3Dihub Using carbon-coated alumina nanoparticles as a model filler for styrene-butadiene rubber (SBR), rubber composites with different carbon surface chemistry were prepared and the bound rubber thus formed in each composite was analyzed in relation to the carbon surface chemistry. The present approach provides quantitative understanding of the rubber-carbon interface at the molecular lev...続きを読む »
2020/03/24
2020/01/24
2020/01/24
Understanding the chemical structure of carbon edge sites by using deuterium-labeled temperature-programmed desorption technique https://www.sciencedirect.com/science/article/pii/S0008622320300865?via%3Dihub A deuterium-labeled temperature-programmed desorption (TPD) technique was developed to accurately characterize functional groups on the surface of carbon-based materials. After the protic hydrogen of the functional groups on activated carbons was substituted by deuterium, TPD analysis revealed the desorption of deuterium compounds (D2O, DHO, D2, DH). The functional groups were estimated fr...続きを読む »
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