Masayuki Shirai
Iwate University
Supercritical fluidSelectivitySupercritical carbon dioxideNuclear chemistryCatalysisSupercritical water oxidationOrganic chemistryInorganic chemistryChemistryMaterials scienceElectrochemical reduction of carbon dioxideDehydrationSolventChemical engineeringRhodiumCarbon dioxideYield (chemistry)Ruthenium
107Publications
25H-index
1,873Citations
Publications 112
Newest
#1Yoshiyuki Nagasawa (Iwate University)H-Index: 2
#2Etty Nurlia Kusumawati (Iwate University)
Last. Masayuki Shirai (AIST: National Institute of Advanced Industrial Science and Technology)H-Index: 25
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Ring-hydrogenation of 4-propylphenol (4-PP) to 4-propylcyclohexanone, cis- and trans-4-propylcyclohexanols proceeded over graphite-supported palladium catalysts (Pd/G) in aqueous ethanol solution a...
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#1Mika Sodeno (Iwate University)H-Index: 1
#2Shusuke Kato (Iwate University)H-Index: 1
Last. Masayuki Shirai (Iwate University)H-Index: 27
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Abstract Synthesis of platinum nanoparticles intercalated between layers of commercially available graphite powder samples possessing surface area values ranging from 20 to 750 m2 g-1 was attempted by the insertion of platinum chloride between the layers followed by hydrogen reduction. Platinum nanosheets with 1-4 nm thickness and 5-300 nm width and hexagonal holes were obtained for the graphite powder with 20 m2 g-1 independent of the platinum loadings (5, 10, and 15 wt%). Platinum nanosheets w...
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#1Masayuki Shirai (Iwate University)H-Index: 27
#2Kohei Kubo (Iwate University)
Last. Hidetaka Nanao (Iwate University)H-Index: 18
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Insertion of sheet-type platinum particles (platinum nanosheets) between graphite layers was achieved by a thermal treatment of a mixture of platinum chloride (IV) and graphite powder (natural graphite or artificial graphite) under 0.3 MPa of chlorine at 723 K, followed by the treatment under 40 kPa of hydrogen pressure. Platinum nanosheets were 1-3 nm in thickness and 100 - 500 nm in width and had a number of hexagonal holes and edges with 120o angle. The insertion position of the platinum nano...
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#1Yoshiyuki Nagasawa (Iwate University)H-Index: 2
#2Yushi Hiraishi (Iwate University)H-Index: 1
Last. Masayuki Shirai (AIST: National Institute of Advanced Industrial Science and Technology)H-Index: 25
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The ring hydrogenation of 4-propylphenol in aqueous ethanol solution was studied over graphite- and activated carbon-supported palladium catalysts (Pd/G and Pd/C) with 0.1–5 wt % of palladium loadi...
1 CitationsSource
#1Kenkichi TaniguchiH-Index: 2
#2Hidetaka NanaoH-Index: 18
Last. Masayuki Shirai (AIST: National Institute of Advanced Industrial Science and Technology)H-Index: 25
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Alcoholysis of benzyl phenyl ether to various aromatic compounds was studied in high-temperature aqueous methanol solution under high-pressure carbon dioxide conditions. The products formed included benzyl methyl ether, benzyl alcohol, phenol and toluene. As high as 70.7 ± 0.2% yield of monocyclic aromatic hydrocarbon with 16.1 ± 0.3% yield of benzyl methyl ether was obtained by treating benzyl phenyl ether with an aqueous solution with 0.2 molar fraction of methanol, under 17.7 MPa carbon dioxi...
1 CitationsSource
#1Yushi Hiraishi (Iwate University)H-Index: 1
#2Naohiro Minakawa (Iwate University)
Last. Masayuki Shirai (AIST: National Institute of Advanced Industrial Science and Technology)H-Index: 25
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Abstract Graphite-supported platinum catalysts (Pt/G) were highly active for the hydrogenolysis of benzofuran to o-ethylphenol in aqueous ethanol solution at 523 K without using any external hydrogen gas. The hydrogenolysis activities and selectivity to o-ethylphenol in ethanol solution over Pt/G were higher than those with a conventional method using externally supplied hydrogen gas. Both water and ethanol were indispensable for the hydrogenolysis in aqueous ethanol solution at 523 K.
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#1Mika Sodeno (Iwate University)H-Index: 1
#2Hidetaka Nanao (Iwate University)H-Index: 18
Last. Masayuki Shirai (Iwate University)H-Index: 27
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Spherical palladium nanoparticles between graphite layers were prepared by the intercalation of palladium chloride followed by its reduction between graphite layers. The palladium particles interca...
1 CitationsSource
#1Toshinobu Korenaga (Iwate University)H-Index: 23
#2Hiroto Kori (Iwate University)
Last. Masayuki Shirai (Iwate University)H-Index: 27
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#1Sasithorn Kuhaudomlap (Chula: Chulalongkorn University)H-Index: 2
#2Piyasan Praserthdam (Chula: Chulalongkorn University)H-Index: 51
Last. Joongjai Panpranot (Chula: Chulalongkorn University)H-Index: 32
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Abstract Nickel-doped spherical silica (SSP) catalysts with ca. 10 wt% Ni were prepared via a sol-gel method using cetyltrimethyl ammonium bromide as the structure directing agent with different loading sequences of Ni and Si sources (Si1_Ni2, Ni1_Si2, and Ni_Alt_Si). For comparison purposes, the SSP supported Ni catalysts were also prepared by impregnation method (Ni/SSP (Imp)). All the prepared catalysts showed spherical shape with high specific surface area (357-868 m2/g). The X-ray diffracti...
3 CitationsSource
#2Junpei Abe (Iwate University)H-Index: 1
Last. Ken-ichi Kimura (Iwate University)H-Index: 26
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ABSTRACTKuji amber is fossilized tree resin of the Late Cretaceous in Japan. In this study, new biological activities of ethanol extract of Kuji amber (EtOH ext.) and supercritical carbon dioxide f...
2 CitationsSource