Turnover gold nanoparticles

Application of small metal particles has attracted the attention of the scientists for a long time. As early as in the seventies Turkevich already prepared mono-dispersed gold particles [19], and later, using molecular transition metal carbonyl clusters [20], the importance of small nanoparticles increased considerably. One of the crucial points is whether turnover frequency measured for a given catalytic reaction increases or decreases as the particle size is diminished. 

FIGURE 6.3 Relationships between turnover frequency (TOP) for CO oxidation for Au/TiOj and Pt/SiOj as a function of the mean diameter of the metal particles at 273 and 437 K, respectively. (Reprinted from When gold is not noble Catalysis by nanoparticles, M. Haruta, Chem. Rec., 2003, 3, 75. With permission.)... 

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