fig1

Figure 1. Synthesis and basic characterization of M4Zn-S and M4-S. (A) Hydrothermal synthesis schematic of M4Zn-S and M4-S; (B) XRD patterns of M4Zn-S and M4-S; (C) TEM images, (D) high-resolution TEM images, (E) particle size distribution, (F) elemental content analysis via ICP, and (G) TEM elemental mapping of M4Zn-S; XPS spectra including (H) Mo 3d, (I) Ni 2p, (J) Ru 3d and C 1s, and (K) Fe 2p for M4Zn-S and M4-S, as well as (L) Zn 2p for M4Zn-S. XRD: X-ray diffraction; TEM: transmission electron microscopy; ICP: inductively coupled plasma; XPS: X-ray photoelectron spectroscopy.