Low-Voltage Driven Co-Production of Ammonia, Formate, and Hydrogen From Nitrite Reduction Coupled Formaldehyde Oxidation System on Ultra-Stable AuCuRh Nanowires under Illumination.
basic_science · Level V
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- Record sourced from PubMed, PMID 41058543.
- Also identified by DOI 10.1002/adma.202513320.
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Abstract
The nitrite electroreduction reaction (NO<sub>2</sub>RR) offers a green and sustainable pathway for environmental wastewater treatment and ammonia (NH<sub>3</sub>) generation. Herein, defect-rich trimetallic AuCuRh nanowires (AuCuRh NWs) with a large number of grain boundaries, twin boundaries, and atomic steps are successfully synthesized by galvanic replacement reaction. Due to its self-stability and high activity, AuCuRh NWs can efficiently drive the stable NO<sub>2</sub>RR at 0 V potential (Faradaic efficiency: 98.32%, NH<sub>3</sub> yield rate: 20.49 mg h<sup>-1</sup> mg<sub>cat</sub> <sup>-1</sup>). Moreover, AuCuRh NWs also reveal excellent electrocatalytic activity for the formaldehyde electrooxidation reaction (FOR), which can reach 10 mA cm<sup>-2</sup> at only 0.35 V potential. The NO<sub>2</sub>RR||FOR electrolysis system assembled with AuCuRh NWs requires only the electrolysis voltage of 0.38 V to achieve the co-production of NH<sub>3</sub>, formate, and hydrogen and ultra-stable continuous electrolysis for 300 hours. The NO<sub>2</sub>RR||FOR electrolysis system can be further decreased to only 0.29 V under illumination due to plasmon-enhanced activity. This study provides an energy-efficient coupling strategy for the stable co-production of value-added chemicals.