Fig. 3: The role of Cl- on the Co oxidation state for the CoOxCly catalyst.
From: Self-adaptive amorphous CoOxCly electrocatalyst for sustainable chlorine evolution in acidic brine
a The Co 2p XPS spectra of the CoOxCly and CoOx film after 2 h electrodeposition at 1.67 V, respectively. b The corresponding Co3+/Co2+ ratio of the CoOxCly and CoOx film. c The Raman spectra of the CoOxCly and CoOx films after 10 h electrodeposition at 1.67 V. d Co K-edge XANES at different applied potentials from the open-circuit condition to 2.02 V for CoOxCly film. e Co K-edge energy at different applied potentials for CoOx and CoOxCly film. The absorption energy (E0) is obtained from the first maximum in the first-order derivative as the electronic vacancy. The error bars represent the standard deviation for triplicate measurements.
