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Article Dans Une Revue Catalysis Today Année : 2014

In-situ monitoring of transition metal complex adsorption on oxide surfaces during the first stages of supported metal catalyst preparation

Résumé

In the preparation of supported catalysts by deposition, in solution, of a transition metal complex (TMC) on an oxide support, the interactions occurring at the solid/liquid interface between the TMC and the oxide have a crucial impact on the properties of the final catalyst. However, these interactions remain difficult to investigate and monitor as most of the spectroscopic characterization techniques can only be used once the solvent has been removed, which eliminates an essential partner of the interaction. In this paper, we show that Quartz Crystal Microbalance with dissipation monitoring (QCM-D), a highly sensitive technique operating in situ at the solid/liquid interface, can be used to undo this technical lock. QCM-D was used to study two well-known systems: the adsorption of [Pt(NH3)4]2+ on silica at high pH and the adsorption of [PtCl6]2− on alumina at low pH, in order to demonstrate that QCM-D can be a very useful tool for the investigation of the interaction between a TMC and an oxide surface in solution.
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Dates et versions

hal-01077975 , version 1 (27-10-2014)

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Juliette Blanchard, Antoine Hervier, Guylène Costentin, John Regalbuto, Catherine Louis, et al.. In-situ monitoring of transition metal complex adsorption on oxide surfaces during the first stages of supported metal catalyst preparation. Catalysis Today, 2014, 235, pp.245-249. ⟨10.1016/j.cattod.2014.03.031⟩. ⟨hal-01077975⟩
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