2.

Characterization of the structure and composition of CuRu x . (a) Schematic diagram of the synthetic route for CuRu x . (b) XRD images. (c, d) XPS spectra. (e, f) SEM image. (g) Distribution of Ru and Cu elements in CuRu0.5 NPs.

Characterization of the structure and composition of CuRu x . (a) Schematic diagram of the synthetic route for CuRu x . (b) XRD images. (c, d) XPS spectra. (e, f) SEM image. (g) Distribution of Ru and Cu elements in CuRu0.5 NPs.