Zeolite DEXAFS study

Formation, interaction as well as reaction of chloro- and bromobenzene on Pd zeolites have been studied in situ in a continuous flow reactor at the Pd and Br K-edges using the ROMO II and DEXAFS stations at beamline X at HASYLAB. The experimental set-up of this beamline as well as the reactor and gas flow set-up is described elsewhere [5],... 

DEXAFS has, for example, been used to follow the dehydration of (Ni +, Na+)-loaden zeolite Y [84]. In another study, the reactions of partially Cu-exchanged Na-zeolite Y with pure H2 or with a mixture of H2/H2O have been investigated [85]. Pure hydrogen leads to the reduction of Cu + to Cu+,but not to metallic copper due to the strong interaction of the Cu(I) cations with the aliuninosilicate framework. After admission of additional water vapor, however, the Cu(I) cations become mobile and are reduced to Cu(0), forming small metallic copper clusters. 

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