The application of the 1H NMR microimaging technique to the indirect mapping of the spatial distribution of
hexachloroplatinate dianion within porous alumina pellets is reported. It is demonstrated that the nuclear
spin−lattice relaxation times of liquids filling the pores of the pellet increase in the presence of the adsorbed
hexachloroplatinate dianion. The microimaging results for the supported catalysts with two types of platinum
distribution (egg-shell and egg-white) are shown to be consistent with the results obtained by the staining
method and electron probe microanalysis. Finally, the microimaging technique is employed for a nondestructive
visualization of the dynamics of the active component redistribution in the course of the supported catalyst
preparation by competitive adsorption.
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