Infrared spectroscopy at the surface of carbonates
Taha Elgayyar1, Federico Azzolina-Jury1, Frédéric Thibault-Starzyk1
1Université de Caen Normandie, ENSICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, 14000 Caen, France. tahaelgayyar1@gmail.com.
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IR spectroscopy has been extensively employed to characterize the structural and vibrational properties of carbonates; yet, its application in studying the adsorption capacity of carbonate surfaces remains limited. This short review presents the use of FTIR as a powerful tool for investigating the structure and surface chemistry of carbonates, which is relevant to several environmental and industrial applications (such as CO2 capture and storage). Several FTIR techniques provide detailed analysis of the structure of carbonate polymorphs (calcite, aragonite, vaterite, and amorphous phases) alongside their phase transformation kinetics. In addition, adsorption studies of various molecules (CO, CO2, H2O, acids and several HCs) were performed to identify the adsorption sites, mechanisms and intermediates. These insights highlight the significance of IR spectroscopy for understanding the carbonate structure and surface properties, and guide future research in several environmental and industrial processes where carbonates are involved.
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