Resonant acoustic mixing (RAM) enables mechanoredox catalysis with BaTiO as the piezoelectric catalyst on model diazonium coupling reactions. RAM proceeds without formal grinding or impact media, is faster than the analogous ball-milling strategy, and is readily scalable. X-ray diffraction and spectroscopy indicate that reusability of BaTiO as a mechanoredox catalyst under ball-milling or RAM might be limited by boration.

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