Details of a Researcher - SHIRAI MASAYUKI

SHIRAI MASAYUKI

写真a

Affiliation	IWATE University Faculty of Science and Engineering Department of Chemistry and Biological Science Studies in Chemistry
Position	Professor
Homepage URL	http://www.chem.iwate-u.ac.jp/labo_web/inorg_reaction/top.html

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Degree 【 display / non-display 】

The University of Tokyo - Ph.D 1993.03.29

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Campus Career 【 display / non-display 】

2016.04

-

Now

IWATE University Faculty of Science and Engineering Professor [Duty]

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Course Subject 【 display / non-display 】

2018

Information for Chemistry and Bioengineering
2018

Chemistry and Bioengineering Seminar
2018

Inorganic Reaction Chemistry
2018

Inorganic Chemical Bonding
2018

Advanced Training

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Published Papers 【 display / non-display 】

Two-dimensional ruthenium nanoparticles between graphite layers: The effect of reduction temperature

S. Kudo, M. Sodeno, K. Taniguchi, E. N. Kusumawati, H. Nanao, M. Shirai

Journal of the Indian Chemical Society 100 101011 2023.06 [Refereed]

Bulletin of University, Institute, etc. Single Work

A mixture of graphite powder and ruthenium chloride (III) anhydrous was treated at 723 K under 0.3 MPa chlorine for 3 days, followed by reduction under 40 kPa of hydrogen for 1 h to produce ruthenium metal particles intercalated between graphite layers (Ru-GIC). The structures of ruthenium particles depended on the reduction temperatures. Sheet-like ruthenium particles with 1–3 nm thickness and 10 to several hundred nm width containing numerous irregularly shaped holes with round edge, were formed by reduction at 573 K. A Ru-GIC sample treated at 653 K possessed two-dimensional ruthenium nanosheets with hexagonal holes (straight lines intersect at an angle of 120◦) in a similar range of thickness and width. On the other hand, Ru-GIC samples
reduced at 773 and 823 K showed two-dimensional plate morphology with a thickness of 1–4 nm. In addition, ruthenium nanoparticles supported on the graphite surface (Ru/Gmix) were also prepared from a slurry of ruthenium chloride (III) hydrate and graphite powder by impregnation and hydrogen reduction. The ruthenium particles in Ru/Gmix were spherical at about 3.6 nm, and the reduction temperature did not affect their particles size. Both Ru-GIC and Ru/Gmix samples were evaluated for cinnamaldehyde (CAL) hydrogenation in supercritical carbon dioxide solvent at 323 K, and they were active to produce cinnamyl alcohol (COL) and hydrocinnamaldehyde (HAL). However, Ru-GIC samples showed higher COL selectivity than Ru/Gmix prepared at the same reduction temperature, and COL selectivity over Ru-GIC increased with the reduction treatments at 773 and 823 K.
Graphite-supported platinum-palladium bimetallic catalyst for aromatic hydrogenation of 4-propylphenol in aqueous ethanol solution under free-external hydrogen source

E.N.Kusumawati, D.Horyo, K.Taniguchi, H.Nanao, T.Sasaki, O.Sato, A.Yamaguchi, M.Shirai

Catalysis Today ( Elsevier ) 411 113832 2023.03 [Refereed]

Academic Journal Multiple authorship

Hydrogenation of 4-propylphenol (4PP) was studied over graphite-supported platinum-palladium (Pt-Pd/G) bimetallic catalysts in aqueous ethanol solution without the use of external source. Compared to the corresponding monometallic (Pt/G and Pd/G) catalysts, the prepared Pt-Pd/G bimetallic catalysts were more active for hydrogen production and aromatic hydrogenation to 4-propyl cyclohexanone (NONE), cis- and trans-4-propyl cyclohexanols (NOLs). Pt/G was active for hydrogen production but inactive for 4PP hydrogenation, and Pd/G catalyst was active for both hydrogen production and 4PP hydrogenation. Pt-Pd/G catalysts with different platinum to palladium ratios (Pt:Pd = 1:0, 1:1, 1:2, 1:4, 1:8 and 0:1) were prepared to obtain the best composition
for the ring hydrogenation. Among the bimetallic catalysts prepared, the yields of NONE and NOLs were the highest over 0.5Pt-0.5 Pd/G (0.5 wt% platinum and 0.5 wt% palladium loadings, and Pt:Pd=1:2). TEM analysis showed small (3.1–3.3 nm) metal particles dispersed on the graphite surface in the bimetallic catalysts. EXAFS analysis showed the formation of platinum core-palladium enriched shell structure of bimetallic particles. It was suggested that the high activity of Pt-Pd/G catalysts for 4PP hydrogenation in aqueous ethanol solution was caused by the formation of small platinum-palladium alloy particles on graphite surface and that palladium on the surface of particles was the active site. This work demonstrated Pt-Pd/G as highly active catalysts for aromatic hydrogenation of 4PP without the use of any external hydrogen source.

DOI
Iridium nanodisks intercalated between graphite layers: iridium loading and metal particle size

M. Shirai, S. Kudo, T. Sobu, M. Sodeno, S. Kato, E. N. Kusumawati, H. Nanao,

Catalysis Surveys from Asia ( Springer ) 27 107 - 114 2023.03 [Refereed]

Academic Journal Multiple authorship

Iridium nanoparticles were synthesized between graphite layers by thermal treatment of the mixture of iridium chloride (IV) and graphite powder under chlorine atmosphere followed by hydrogen reduction (Ir-GIC). In Ir-GIC samples with 1-6 wt% iridium metal loadings, all iridium nanoparticles with disk-shape (iridium nanodisks) were located between graphite layers; however, iridium nanoparticles on graphite surface were also formed in addition to iridium nanodisks in the Ir-GIC samples with 8 and 10 wt% iridium metal loadings. Iridium nanodisks between graphite layers were highly active for cinnamaldehyde hydrogenation and selective to cinnamyl alcohol compared with the iridium particles on graphite surfaces.
Recent progress in biphasic catalytic systems using ionic liquids

E.N.Kusumawati and M. Shirai

Current Opinion in Green and Sustainable Chemistry 3 100613 2022.02 [Refereed]

Academic Journal Multiple authorship
4-Propylphenol Hydrogenation over Pt-Pd Bimetallic Catalyst in Aqueous Ethanol Solution without External Hydrogen

Y.Nagasawa, E.N.Kusumawati, H.Nanao, T.Sasaki, O.Sato, A.Yamaguchi, and M.Shirai

Chemistry Letters ( Chemical Society of Japan ) 50 ( 12 ) 1968 - 1971 2021.08 [Refereed]

Academic Journal Multiple authorship

DOI

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Presentations 【 display / non-display 】

Solvolysis of aryl ether compounds in high-temperature methanol solution under high-pressure carbon dioxide

Poster (General)

2021.12

　

　
Structure and Catalysis of Two-dimensional Platinum Nano Sheets between Graphite Layers

Oral Presentation(General)

2021.12

　

　
Hydrogenolysis of benzofuran in aqueous ethanol solution using supported platinum catalyst"

Poster (General)

2021.12

　

　
Iridium nano disks intercalated between graphite layers

Poster (General)

2021.12

　

　
Alcoholysis of lignin-related model compounds in high-temperature liquid water under high-pressured carbon dioxide

Poster (General)

2021.12