High-Entropy Effect of Mesoporous Metal Oxides Promotes Tandem Catalysis for Efficient Ammonia Electrosynthesis from Nitrate

© 2025 Wiley‐VCH GmbH.

Détails bibliographiques
Publié dans:Advanced materials (Deerfield Beach, Fla.). - 1998. - 37(2025), 41 vom: 17. Okt., Seite e08982
Auteur principal: He, Hangjuan (Auteur)
Autres auteurs: Yao, Huiqin, Sun, Lizhi, Yang, Yuyang, Qiao, Zhen-An, Liu, Ben
Format: Article en ligne
Langue:English
Publié: 2025
Accès à la collection:Advanced materials (Deerfield Beach, Fla.)
Sujets:Journal Article NH3 electrosynthesis high‐entropy material mesoporous oxide nitrate reduction tandem catalysis
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520 |a Electrocatalytic nitrate reduction reaction (NO3 -RR) in water offers a sustainable alternative for robust electrosynthesis of value-added ammonia (NH3) in ambient conditions. However, NO3 -RR electrocatalysis generally involves two-step tandem routes and suffers from sluggish hydrodeoxygenation kinetics, which result in a low ammonia selectivity and yield rate. In this work, it is demonstrated that the high-entropy effect of mesoporous metal oxides remarkably decreases the energy barrier of the hydrodeoxygenation route and facilitates two-step tandem electrocatalysis of NO3 -RR, which thus promotes selective NH3 electrosynthesis in an alkaline condition. By comparing a series of high-entropy mesoporous metal oxides and corresponding metal alloys and monometallic counterparts, high-entropy mesoporous (CoMnFeNiCu)3O4 discloses the highest electrocatalytic performance for efficient NH3 electrosynthesis from NO3 -RR, including remarkable NH3 Faradaic efficiency of 96.3%, high NH3 yield rate of 1.83 mmol h-1 mg-1, and excellent recycling stability of 20 cycles, representing one of the best electrocatalysts reported in the past three years. Moreover, cathode NO3 -RR performance for selective NH3 electrosynthesis is enhanced when further coupled with the thermodynamically favorable benzyl alcohol oxidation reaction at the anode. It is expected that the high-entropy effect opens up a new route to design a library of novel tandem mesoporous metal electrocatalysts for the selective electrosynthesis of various valuable chemicals from wastewater 
650 4 |a Journal Article 
650 4 |a NH3 electrosynthesis 
650 4 |a high‐entropy material 
650 4 |a mesoporous oxide 
650 4 |a nitrate reduction 
650 4 |a tandem catalysis 
700 1 |a Yao, Huiqin  |e verfasserin  |4 aut 
700 1 |a Sun, Lizhi  |e verfasserin  |4 aut 
700 1 |a Yang, Yuyang  |e verfasserin  |4 aut 
700 1 |a Qiao, Zhen-An  |e verfasserin  |4 aut 
700 1 |a Liu, Ben  |e verfasserin  |4 aut 
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773 1 8 |g volume:37  |g year:2025  |g number:41  |g day:17  |g month:10  |g pages:e08982 
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