A-Level CAIE Chemistry A2 26.2.2—Heterogeneous catalyst action Question Bank

• Describe the mode of action of a heterogeneous catalyst to include adsorption of reactants, bond weakening and desorption of products, e.g.:

- (a) iron in the Haber process

- (b) palladium, platinum and rhodium in the catalytic removal of oxides of nitrogen from the exhaust gases of car engines