Demonstrates enhanced catalytic activity in amorphous alumina catalysts through pH-controlled aluminum coordination, implying new avenues for catalyst design.
Amorphous alumina is rich in five-coordinated aluminum (Al( v )). Precise deconvolution of 27 Al NMR spectra revealed that Al( v ) consists of trigonal bipyramidal and square pyramidal components, the latter possessing strong Lewis acidity and exhibiting high catalytic activity.
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Watanabe et al. (2026) studied this question.
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