Figure 1
From: Ag surface segregation in nanoporous Au catalysts during CO oxidation
Relationship between catalytic transformation and coarsening. (a) The conversion degree of CO to CO2, α, as a function of time t. (b) The specific surface area, Ssp, of NP Au catalysts as a function of time, t. Data refer to NP Au foams used in catalytic runs performed at 273 (□), 283 (
), 293 (
) and 303 (
) K. The vertical dotted line marks the Ssp values, Ssp,fin attained after 5 h of exposition to reactive gases. (c) The rate of catalyst activity reduction, r, as a function of the final specific surface area, Ssp,fin. Best-fitted line is also shown.
