Tandem Nitrate‐to‐Ammonia Conversion on Atomically Precise Silver Nanocluster/MXene Electrocatalyst

Electrocatalytic reduction of nitrate (NO3RR) to synthesize ammonia (NH3) provides a competitive manner for carbon neutrality and decentralized NH3 synthesis. Atomically precise nanoclusters, as an advantageous platform for investigating the NO3RR mechanisms and actual active sites, remain largely u...

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Published inAngewandte Chemie International Edition Vol. 63; no. 8; pp. e202316910 - n/a
Main Authors Liu, Lin, Zheng, Su‐Jun, Chen, Hong, Cai, Jinmeng, Zang, Shuang‐Quan
Format Journal Article
LanguageEnglish
Published Germany Wiley Subscription Services, Inc 19.02.2024
EditionInternational ed. in English
Subjects
Ammonia
Catalysis
Catalytic activity
Chemical reduction
Composite structures
Electrocatalysis
Electrocatalysts
Metal Nanoclusters
MXene
MXenes
Nanoclusters
Nitrate Reduction
Silver
Synthesis
Tandem Catalysis
Nitrate Reduction
electrocatalysis
MXene
Metal nanoclusters
tandem catalysis
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Summary:Electrocatalytic reduction of nitrate (NO3RR) to synthesize ammonia (NH3) provides a competitive manner for carbon neutrality and decentralized NH3 synthesis. Atomically precise nanoclusters, as an advantageous platform for investigating the NO3RR mechanisms and actual active sites, remain largely underexplored due to the poor stability. Herein, we report a (NH4)9[Ag9(mba)9] nanoclusters (Ag9 NCs) loaded on Ti3C2 MXene (Ag9/MXene) for highly efficient NO3RR performance towards ambient NH3 synthesis with improved stability in neutral medium. The composite structure of MXene and Ag9 NCs enables a tandem catalysis process for nitrate reduction, significantly increasing the selectivity and FE of NH3. Besides, compared with individual Ag9 NCs, Ag9/MXene has better stability with the current density performed no decay after 108 hours of reaction. This work provides a strategy for improving the catalytic activity and stability of atomically precise metal NCs, expanding the mechanism research and application of metal NCs. Silver nanoclusters loaded on Ti3C2 MXene (Ag9/MXene) displays highly efficient NO3RR performance towards ambient NH3 synthesis in neutral medium. The composite structure of MXene and Ag9 NCs enables a tandem catalysis process for nitrate reduction, significantly increasing the selectivity and FE of NH3.
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ISSN:1433-7851
1521-3773
1521-3773
DOI:10.1002/anie.202316910