articleACS CatalysisAug 2, 2023Closed access

Boosting Electrocatalytic Nitrate Reduction to Ammonia via Promoting Water Dissociation

Dalian Institute of Chemical Physics · Chinese Academy of Sciences · +3 more institutions

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Abstract

Electrocatalytic nitrate reduction reaction (NO3–RR) opens opportunities for ammonia production. The sluggish kinetics of this multielectron and multiproton process has been regarded as the key issue. Herein, we report a Cu1Co5 alloy for electrocatalytic NO3–RR to NH3. It achieves a high current density (453 mA cm–2) and Faradaic efficiency (96.2%) for NH3 production at 0.075 V vs RHE, with a half-cell energy efficiency of 44.9%, higher than those of Cu, Co, and other Co-based alloys, and is among the highest value reported. We found that the interaction between Cu and Co reorganizes their electronic structure in alloys. The NO3– adsorption switches to a spontaneous process, and the *NO → *N and *NH → *NH2…

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