in 1 cm2 of the surface. Calculate for the catalyst. This catalyst worked during 40 minutes TOF and then became inactivated. Estimate TON. Figure 1b. The amount of the product as a function of time NB a) is often used to describe the operation of deposited catalysts. To make a deposited TOF catalyst one has to deposit atoms of metal on the inert surface. These atoms form catalytic sites. The dependence of the rate of the catalytic reaction upon the amount of metal atoms deposited on 1 cm2 of the surface (less than one monolayer) is shown in Fig. Calculate TOF. 2а. Figure 2a. The dependence of on Nb NCat b) Russian scientist professor Nikolay I. Kobozev has shown that the dependence of NВ on can be much more complicated. The corresponding curve in Fig. 2b has maximum! NCat According to the a structure consisted of deposited Kobozev’s theory (a simplified version) n atoms rather than a single atom form a catalytic site. Maximum rate of catalytic reaction was observed when From the data shown in Fig. 2b calculate the number of atoms forming a catalytic site. n, TOF for the point of maximum rate in Fig. 2b is given in SI units. Figure 2b. The dependence of on Nb NCat 4. Atoms of Au deposited on the Mo-TiOX support exhibit exceptional catalytic activity for the CO oxidation (M. S. Chen and D. W. Goodman, Science, v.306, p.254, 2004). The maximum rate of reaction {mol/cm2/s} was observed for the bilayer atomic r1 structure presented in Fig. 3a. Red and yellow spheres are atoms of Au. For the monolayer structure (Fig. 3b), the reaction was four times slower, = ¼ Calculate the ratio of for r2 r1. TOF the atoms of Au in the upper layer in Fig. red spherical particles), to for the TOF 3а (all monolayer in Fig. 3b (all yellow spherical particles). In the former case, every single Au atom is a catalytic site. The rate of the catalytic reaction on each yellow site in Fig.3a and Fig.3b is the same if the site is accessible to reactants and is equal to zero if the access is blocked.
in 1 cm2 of the surface. Calculate TOF for the catalyst. This catalyst worked during 40 minutes and then became inactivated. Estimate TON. Figure 1b. The amount of the product NB as a function of time a) TOF is often used to describe the operation of deposited catalysts. To make a deposited catalyst one has to deposit atoms of metal on the inert surface. These atoms form catalytic sites. The dependence of the rate of the catalytic reaction upon the amount of metal atoms deposited on 1 cm2 of the surface (less than one monolayer) is shown in Fig. 2а. Calculate TOF. Figure 2a. The dependence of Nb on NCat b) Russian scientist professor Nikolay I. Kobozev has shown that the dependence of NВ on NCat can be much more complicated. The corresponding curve in Fig. 2b has maximum! According to the Kobozev’s theory (a simplified version) a structure consisted of n deposited atoms rather than a single atom form a catalytic site. Maximum rate of catalytic reaction was observed when From the data shown in Fig. 2b calculate n, the number of atoms forming a catalytic site. TOF for the point of maximum rate in Fig. 2b is given in SI units. Figure 2b. The dependence of Nb on NCat 4. Atoms of Au deposited on the Mo-TiOX support exhibit exceptional catalytic activity for the CO oxidation (M. S. Chen and D. W. Goodman, Science, v.306, p.254, 2004). The maximum rate of reaction r1 {mol/cm2/s} was observed for the bilayer atomic structure presented in Fig. 3a. Red and yellow spheres are atoms of Au. For the monolayer structure (Fig. 3b), the reaction was four times slower, r2 = ¼ r1. Calculate the ratio of TOF for the atoms of Au in the upper layer in Fig. 3а (all red spherical particles), to TOF for the monolayer in Fig. 3b (all yellow spherical particles). In the former case, every single Au atom is a catalytic site. The rate of the catalytic reaction on each yellow site in Fig.3a and Fig.3b is the same if the site is accessible to reactants and is equal to zero if the access is blocked.
Preparatory_problems_IChO_2013.docx