Dispersion assessment of H3PMo12O40 supported on TiO2 through in situ IR upon pyridine adsorption
(2026) Applied Catalysis A: General — Vol. 718, p. 120892 (2026)
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- Keggin heteropolyacids (HPAs) are powerful catalytic materials because of their particularly high acid strength. Dispersing them on a support is a commonly adopted strategy to overcome their low specific surface area and increase their recoverability. In this regard, their dispersion needs to be characterized. In situ IR measurements upon pyridine adsorption (IR-py) has recently been carried out on TiO2-supported H3PW12O40 to assess its dispersion quantitatively for the first time. Herein, we report the precautions to take when extending this approach to another Keggin HPA, namely H3PMo12O40 (HPMo). In particular, the purpose of the current work is to comment on the earlier published work rather to present a full study and to show that, for reducible HPAs like H3PMo12O40, reoxidation is required to employ IR-py as a tool to quantify dispersion. For these reasons, no catalytic tests are provided and the extent of reoxidation is not measured/characterized as well.
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Magerat, A., Valentin, L., Vimont, A., Hermans, S., Gaigneaux, E. M., & Schnee, J. (2026). Dispersion assessment of H3PMo12O40 supported on TiO2 through in situ IR upon pyridine adsorption. Applied Catalysis A: General, 718, 120892. https://doi.org/10.1016/j.apcata.2026.120892 (Original work published 2026)