Fig. 1: Synthesis and characterizations of the Cu₂O cube and Cu₂O aggregate.

Synthetic protocols for the (a) Cu₂O cube and (b) Cu₂O aggregate. c, e TEM, d, f HRTEM, and lattice fringes of the (c, d) Cu₂O cube and (e, f) Cu₂O aggregate. g XRD patterns and (h) FT-EXAFS spectra of Cu₂O cube and Cu₂O aggregate.