0. Answer ALL parts a) -c). a) State the main differences between DRIFTS and ATR-IR techniques. b) A typical pyridine-DRIFTS experiment contains several absorption modes between 14001700cm1. i) What information about a catalyst can be obtained from a pyridineDRIFTS experiment? ii) Describe, using diagrams where necessary, the interaction of pyridine with two different adsorption sites. c) Give an example of a heterogeneous catalyst with basic sites and state a probe molecule could be used in a DRIFTS experiment to probe the basicity