Fig. 3. XRD patterns (a) and LSV data (b) of β-Co(OH)2/Co(OH)F hexagrams calcined at different temperatures. (c) EPR for the β-Co(OH)2/Co(OH)F, P-200, P-400, and P-600. High-resolution XPS Co 2p spectra (d–g), and O 1s spectra (h–k) for the β-Co(OH)2/Co(OH)F (d and h), P-200 (e and i), P-400 (f and j), and P-600 (g and k).
