AbstractThe transition metal forms of α-zirconium-. titanium-, and hafnium phosphates were prepared by ion exchange method. Their structure was investigated by X-ray powder diffraction (XRPD) method. It was found that the transition metal containing phosphates have the same layered structure as the pristine tetravalent metal phosphates, except for the increase of interlayer distance from 7.6 Å to ∼9.5 Å. As a result of the incorporation of transition metals in the layers, the c-axis is increased from ∼15 Å to ∼20 Å (in the case of titanium phosphate to ∼25 Å). All other parameters (a, b and β °) are practically unchanged.
In this study, a Fe-Ni-S/NF hybrid electrode with hierarchical structure was fabricated via a simple hydrothermal and ion exchange method, which exhibits remarkable OER performance in alkaline solution with an...
Comparative study of layered tetravalent metal phosphates containing various first-row divalent metals. Synthesis, crystalline structure