Preparation: A catalyst sample is pretreated, often by heating in an inert or reducing atmosphere to remove impurities. Adsorption: The sample is exposed to a gas at a low temperature, allowing the gas molecules to adsorb onto the catalyst surface. Desorption: The temperature is gradually increased at a controlled rate, causing the adsorbed molecules to desorb from the surface. Detection: The desorbed species are detected and quantified, usually by a mass spectrometer.
