Research / 2019 / Article / Fig 1

Research Article

Highly Efficient and Stable Hydrogen Production in All pH Range by Two-Dimensional Structured Metal-Doped Tungsten Semicarbides

Figure 1

XRD and XPS characterizations of various metal dopants in W2C NSs. (a) XRD patterns of W substrate, W2C, and 2% M-W2C NSs (M=Fe, Co, and Ni) on W substrate. (b) XRD patterns of Cu internal standard, W2C, and 2% M-W2C NSs (M=Fe, Co, and Ni) using Cu as internal standard. (c) High-resolution XPS spectra of Fe 2p, Co 2p, and Ni 2p for 2% M-W2C NSs (M=Fe, Co, and Ni).