A chemisorption analyzer is an analytical instrument used to investigate the surface characteristics of materials, particularly catalysts, by analyzing the adsorption and desorption of gases. It introduces gases such as hydrogen, ammonia, or carbon monoxide to a sample under controlled temperature conditions. The gradual increase in temperature causes the adsorbed gas to desorb, with the type and quantity of released gas being measured to evaluate the material's surface features, such as the number and strength of its active sites.

Techniques and Applications:

• H2-Temperature Programmed Reduction (H2-TPR): Evaluates the reduction behavior of metal catalysts.
• Temperature-Programmed Oxidation (TPO): Analyzes the oxidation behavior and stability of metal catalysts by determining the temperature at which oxidation occurs.
• Temperature-Programmed Desorption of Ammonia (NH3-TPD): Measures the acidic properties of catalysts by analyzing the quantity and strength of acid sites.
• Temperature-Programmed Desorption of Carbon Monoxide (CO-TPD): Studies the interaction of carbon monoxide with metal sites on a catalyst to understand their nature.