Super acidic solids: A new two-step route to high-surface-area metal fluorides is reported, by which amorphous AlF3 can be prepared having a BET(N2) surface area of more than 200 m2 g−1 (see SEM image). This HS-AlF3 shows a very high Lewis acidity and consequently a high catalytic activity.
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Kemnitz et al. (2003) studied this question.
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