They are classified as heterogeneous when they occupy a different phase than the species they act on.
The correlation between particle size and the activity of these substances was considered by van Hardeveld and Hartwig. The concentration of steps and kinks in these species are thought to influence their overall activity. Performing a material balance calculation at the pore of one of these substances gives a value that is the ratio of the rate over the diffusion constant. The productivity of these things is measured by their (*) turnover number, and lead acetate is used to poison one of these named for Lindlar. They are classified as heterogeneous when they occupy a different phase than the species they act on. For 10 points, name these chemical species that lower the activation energy of a reaction.
The correlation between particle size and the activity of these substances was considered by van Hardeveld and Hartwig.
catalysts