Photoelectrocatalytic reduction of nitrate to nitrogen gas by Cu2O nanorod arrays on Cu foams with high stability

selectivity of up to 90% and 76% was achieved across a wide pH range (acidic, neutral, and alkaline conditions) and in real nitrate-containing lake water. This study establishes a novel and practical approach for sustainable nitrate remediation in diverse aqueous systems with potential applications in wastewater treatment and environmental remediation.