Pt/IrO x enables selective electrochemical C-H chlorination at high current

Pt/IrO x enables selective electrochemical C-H chlorination at high current

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Abstract Employing electrochemistry for the selective functionalization of liquid alkanes allows for sustainable and efficient production of high-value chemicals.However, the large potentials required for C(sp icon track bar f250 3)-H bond functionalization and low water solubility of such alkanes make it challenging.Here we discover that a Pt/IrO x electrocatalyst with optimized Cl binding energy enables selective generation of Cl free radicals for C-H chlorination of alkanes.For instance, we achieve monochlorination of cyclohexane with a current up to 5 A, Faradaic efficiency (FE) up to 95% and stable performance over 100 h in aqueous KCl electrolyte.We further demonstrate that our system can directly utilize concentrated seawater derived from a solar evaporation reverse osmosis process, achieving a FE of 93.

8% towards chlorocyclohexane at a current of 1 A.By coupling to a photovoltaic module, we showcase solar-driven production of chlorocyclohexane using concentrated seawater in a membrane electrode assembly cell without any external bias.Our findings constitute a sustainable pathway towards renewable energy driven chemicals manufacture using abundant feedstock at read more industrially relevant rates.