Protonen-Spin-Gitter-Relaxation im System NaPtY-Zeolith/Wasser. Zur Dispersität des Platins

Reduction–agglomeration model for metal dispersion in platinum-exchanged NaX zeolite

“…The reduction in the presence of oxygen is largely incomplete, leaving a large fraction of platinum ions.'. 21 Collisions between platinum atoms and platinum ions should have much higher sticking probabilities owing to strong polarizations and resulting attractive forces. This gives a high density of nuclei in the first step of agglomeration consuming the platinum atom supply more rapidly and preventing the formation of larger metal crystals.…”