A low-cost commercial Cu(II)-EDTA complex for electrocatalytic water oxidation in neutral aqueous solution.

Herein, we choose a commercial Cu complex [Cu(EDTA)(H 2 O)] (EDTA = ethylene diamine tetraacetic acid) as a molecular catalyst for water oxidation to avoid complex synthesis and lower catalyst cost. [Cu(EDTA)(H 2 O)] could catalyze the water oxidation reaction efficiently under neutral conditions with an overpotential of 684 mV, a k cat of 8.03 s -1 and good stability in the long-term electrolysis. Our finding is of great significance for the development of stable, rapid, and easily accessible catalysts for water oxidation.