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From top to bottom, SEM images of Cu‐Mn mixed oxide NPs supported on HT prepared by (a,b) manual grinding, (c, d) wet impregnation, or (e, f) mechanochemical mixing of the support with the metal precursors, followed by calcination. On the left, images collected with lower magnification (scale, 2 μm), on the right, with higher magnification (scale, 1 μm). Adapted with permission from ref. [96]. Copyright of The Royal Society of Chemistry 2018.
