Chemisorption investigations with Mossbauer

The interaction of CO and C02 with the surface of Fe203 (for 8-nm particles) was also studied by Suzdalev et al. (247) using the Mossbauer effect. Due to the small size of these particles, more than 50% of the iron atoms appear superparamagnetic in the Mdssbauer spectrum at room temperature, and the effects of chemisorption were investigated through analysis... 

An indication of growing interdisciplinary interest in the field is illustrated in a review on new perspectives in surface chemistry and catalysis by Roberts 160), who discussed the interaction of N with iron surfaces. In so doing, he referred to the Fe (N2), matrix Mossbauer work of Barrett and Montano (7), which showed that molecular nitrogen only bonds to iron when the latter is present as a dimer. As the chemisorption studies 161) indicated that N is absorbed on singleatom sites, Roberts suggested 160), of the matrix data (7), "if this is correct, then our assignment of the N(ls) peak at 405 eV to end-on chemisorbed Nj will require further investigation. Other reviews that consider matrix-isolation techniques for chemisorption simulation are collected in footnote a. 

There are many techniques for the experimental observation in catalytic investigation, such as BET and chemisorptions, XRD in situ), EPR, SEM, VPR, TEM, TPD, TPR in situ), EMPA, TG, AES, GC, LEED, EELS, EXAFS in situ), XPS (ESCA), Mossbauer in situ), IR (FTIR) in situ), RAM and so on. Many of these techniques require extra-high vacuum conditions and can only investigate crystal faces of solids or model catalysts, which have a large difference with practical catalytic systems and catalysts. 

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