articleAdvanced MaterialsJul 15, 2025BRONZE OA

Robust Oxygen‐Vacancy‐Engineered Co(OH) 2 /Cu Heterostructures Boost Nitrate Electroreduction to Ammonia beyond 2 A cm −2

Tianjin Energy Investment Group (China) · Unité Matériaux et Transformations · +4 more institutions

PubMed
Indexed incrossrefpubmed

Abstract

Abstract Electrocatalytic nitrate reduction reaction (NO 3 RR) presents a sustainable paradigm for green NH 3 synthesis and NO 3 − wastewater valorization. However, overcoming sluggish NO 3 RR kinetics under industrial‐current operation persists as a critical challenge. Herein, robust oxygen vacancy‐enriched heterostructures (O v ‐Co(OH) 2 /Cu) are engineered through in situ electrochemical reconstruction. By coupling Cu‐mediated NO 3 − ‐to‐NO 2 − conversion with O v ‐Co(OH) 2 ‐accelerated NO 2 − ‐to‐NH 3 transformation, this heterostructured system delivers an unprecedented NH 3 yield rate of 167.8 mg h −1 cm −2 and 97.7% Faradaic efficiency at >2 A cm −2 , while maintaining exceptional current tolerance…

No related works found for this paper.

Funding