Self-adaptive amorphous CoO_xCl_y electrocatalyst for sustainable chlorine evolution in acidic brine.

ABSTRACT: Electrochemical chlorine evolution reaction is of central importance in the chlor-alkali industry, but the chlorine evolution anode is largely limited by water oxidation side reaction and corrosion-induced performance decay in strong acids. Here we present an amorphous CoO_xCl_y catalyst that has been deposited in situ in an acidic saline electrolyte containing Co²⁺ and Cl^- ions to adapt to the given electrochemical condition and exhibits ~100% chlorine evolution selectivity with an overpotential of ~0.1 V at 10 mA cm^-2 and high stability over 500 h. In situ spectroscopic studies and theoretical calculations reveal that the electrochemical introduction of Cl^- prevents the Co sites from charging to a higher oxidation state thus

SUBMITTER: Xiao M 

PROVIDER: S-EPMC10475099 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature