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Chemisorption or chemical adsorption is the phenomena whereby chemicals bond strongly to surface of a material via ionic or covalent bonds. It differs from physisorption, where chemical attach to the surface of a material by weak Van der Waals forces. Although it can be difficult to differentiate, the convention is that chemisorption is present if the binding energy per atom or molecule is above about 0.5 eV. chemisorption is of particular importance to catalysts.
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Micromeritics’ ASAP 2020 Accelerated Surface Area and Porosimetry analyzer uses the gas sorption technique to generate high-quality data for research and quality control applications. Available options include the micropore option, the high-vac option, and the chemisorption option, which uses the static volumetric technique to determine the percent metal dispersion, active metal surface area, size of active particles, and surface acidity of catalyst materials.
The Autosorb-iQ is a highly sophisticated gas sorption analyzer available with one or two physisorption analysis ports, both of which can be equipped for low pressure micropore analysis.
The PULSAR combines affordibility and automation and offers compact, bench-top catalyst characterization using automated flow methods of analysis.
The Hiden CATLAB is a bench-top microreactor and combined mass spectrometer system. It has been designed for fast and reproducible catalyst characterisation and reaction analysis.