The idea is generate an high-temperature resistant catalyst.
Sintering of metal/ceramic supported catalyst usually results in binding of catalyst to support layer. Sintering temperature, dwell time and atmosphere have significant effects. Increase in sintering temperature and time lead to more densification but less surface area.
In fact, the process can not be called adhesion since it almost involves chemical interactions by either weak London forces or strong Van der wals forces OR combination of both.
To enhance the chemical binding and to avoid the weak physical interaction, Strong Electrostatic Adsorption (SEA) method is well recommended. This method can achieve two functions; First, is the well dispersion of metal particles with possibility to reduce the particle size to few nanometers and, second, to avoid the aggregation and/or sintering of metal particles in aggregates.
You can also Check the published articles by John. R. Regalbuto for this method.
In general, You need to adjust the pH of the impregnation solution to certain value, at which the highest metal uptake might occur.
Please don't hesitate to contact me regarding any supporting documents for SEA method.
Good Luck
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