A Facile Top‐Down Etching To Create a Cu2O Jagged Polyhedron Covered with Numerous {110} Edges and {111} Corners with Enhanced Photocatalytic Activity

Cutting edge: A Cu2O jagged polyhedron, with numerous {110} edges and {111} corners, has been developed through a top-down selective oxidative etching process at the expense of the original {111} facet (see figure). The as-prepared nanocrystals exhibited higher photocatalytic activities for the degradation of methylene orange, which may be primarily ascribed to the increased edges and corners.