Takasu

The Characterization and Properties of Small Metal Particles. Y. Takasu and A. M. Bradshaw, Surf. Defect. Prop. Solids p. 401 1978). 2. Cluster Model Theory. R. P. Messmer, in "The Nature of the Chemisorption Bond G. Ertl and T. Rhodin, eds. North-Holland Publ., Amsterdam, 1978. 3. Clusters and Surfaces. E. L. Muetterties, T. N. Rhodin, E. Band, C. F. Brucker, and W. R. Pretzer, Cornell National Science Center, Ithaca, New York, 1978. 4. Determination of the Properties of Single Atom and Multiple Atom Clusters. J. F. Hamilton, in "Chemical Experimentation Under Extreme Conditions (B. W. Rossiter, ed.) (Series, "Physical Methods of Organic Chemistry ), Wiley (Interscience), New York (1978). 

H883> J. Ohkanda, T. Kumasaka, A. Takasu, T. Hasegawa, A. Katoh, Heterocycles 1996, 43,... 

Y. Takasu, S. Mizutani, M. Kumagai, S. Sawaguchi and Y. Murakami, Electrochem. Solid-... 

Sugimoto W, Saida T, Takasu Y. 2006. Co-catalytic effect of nanostructured ruthenium oxide towards electro-oxidation of methanol and carbon monoxide. Electrochem Commun 8 411-415. 

Takasu Y, Ohashi N, Zhang X-G, Murakami Y, Yahikozawa K. 1996. Size effects of platinum particles on the electroreduction of oxygen. Electrochim Acta 41 2595-2600. 

The first observation of PSEs for the MOR on Pt was reported by Attwood and co-workers in 1980. They found a beU-shaped curve for the dependence of SA on particle size, with the maximum at about 2nm [Attwood et al., 1980]. Takasu and co-workers reported a decrease in SA with decreasing particle size for Pt particles deposited on GC by vacuum deposition, as depicted in Fig. 15.11 [Yahikozawa et al., 1991]. This PSE was detected in both HCIO4 and H2SO4 and at various electrolyte concentrations [Yahikozawa et al., 1991]. The PSE was confirmed by Kabbabi... 

Figure 15.11 Specific activities for the MOR on Pt/Vulcan XC-72 (1) [Guerin et al., 2004] and Pt/GC (2) [Takasu et al., 2000] in aqueous electrolytes as functions of particle size. For curve 1, currents were measured after 1 minute at 0.6 V vs. RHE in 1 M CH3OH + 0.5 M H2SO4 at room temperature for curve 2, they were measured after 10 minutes at 0.6 V vs. RHE in 0.1 M CH3OH + 0.02 M HCIO4 at 298K. (Curves have been leplotted from Guerin et al. [2004], Copyright 2004 American Chemical Society and from Takasu et al. [2000], Copyright 2000, with permission from Elsevier.)...

Takasu Y, Matsuda Y, Toyoshima I. 1984. A photoelectron spectroscopic study of the effect of particle-size on the adsorbed state of carbon-monoxide over supported palladium catalysts. Chem Phys Lett 108 384-387. 

Takasu Y, Eujii Y, Yasuda K, Iwanaga Y, Matsuda Y. 1989. Electrocatalytic properties of ultra-fine platinum particles for hydrogen electrode reaction in an aqueous solution of sulfuric acid. Electrochim Acta 34 453-458. 

Takasu Y, Zhang XG, Minoura S, Murakami Y. 1997. Size effects of ultrafine palladium particles on the electrocatalytic oxidation of CO. Appl Surf Sci 121 596-600. 

Takasu Y, Iwazaki T, Sugimoto W, Murakami Y. 2000. Size effects of platinum particles on the electro-oxidation of methanol in an aqueous solution of HCIO4. Electrochem Commun 2 671-674. 

Tateishi N, Yahikozawa K, Nishimura K, Masato S, Iwanaga Y, Watanahe M, Enami E, Matsuda Y, Takasu Y. 1991. Electrochemical properties of ultra-fine palladium particles for adsorption and absorption of hydrogen in an aqueous HCIO4 solution. Electrochim Acta 36 1235-1240. 

Yahikozawa K, Eujii Y, Matsuda Y, NishimuraK, Takasu Y. 1991. Electrocatal34ic properties of ultraline platinum particles for oxidation of methanol and formic-acid in aqueous-solutions. Electrochim Acta 36 973-978. 

Zhang X-G, Arikawa T, Murakami Y, Yahikozawa K, Takasu Y. 1995. Electrocatal3ftic oxidation of formic acid on ultrafine particles supported on glassy carbon. Electrochim... 

On the other hand, several examples of chiral sulfonamides derived from ehiral a-amino acids have been successfully employed as ligands for enantio-seleetive Diels-Alder reactions. Thus, Yamamoto and Takasu have easily prepared new chiral Lewis acids from borane and sulfonamides of various ehiral a-amino acids, which were further studied for their abilities to promote the enantioselective Diels-Alder reaction between methacrolein and 2,3-dime-thyl-1,3-butadiene. Since 2,4,6-triisopropylbenzenesulfonamide of a-amino-butyric acid gave the highest enantioseleetivity, this eatalyst was applied to the... 

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