Reactivity of nitrogen atoms from Zif-8 structure deposited over Ti3C2 MXene in the electrochemical nitrogen reduction reaction

The electrochemical nitrogen reduction reaction (NRR) to produce NH3 is the most efficient, eco-friendly and cost-effective alternative to the Haber–Bosch process. It is crucial to investigate and develop electrocatalysts selective for NH3 synthesis. In recent studies, the Ti3C2 MXene has emerged as...

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Published in:Chemical communications (Cambridge, England) England), 2023-08, Vol.59 (67), p.10133-10136
Main Authors: Marinho, André L A, Comminges, Clément, Habrioux, Aurélien, Célérier, Stéphane, Bion, Nicolas, Morais, Cláudia
Format: Article
Language:English
Subjects:
Ammonia
Atomic structure
Chemical reduction
Electrocatalysts
Electrode materials
Haber Bosch process
Hydrogen evolution reactions
MXenes
Nitrogen atoms
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Summary:The electrochemical nitrogen reduction reaction (NRR) to produce NH3 is the most efficient, eco-friendly and cost-effective alternative to the Haber–Bosch process. It is crucial to investigate and develop electrocatalysts selective for NH3 synthesis. In recent studies, the Ti3C2 MXene has emerged as a highly promising electrocatalyst for the NRR process. In this work, we explore the effect of Zif-8 addition over MXene sheets in order to control the rate of hydrogen evolution reaction (HER). Despite the better result obtained for Zif-8@Ti3C2 (3.0 μg NH3 gcat−1 h−1 at −0.55 V/RHE), the ammonia produced when using Zif-8@Ti3C2 as cathode material is shown to be originated from nitrogen atoms contained in the Zif-8 structure instead of those of N2. The results shed light to the need to fully understand the N2 electroreduction process over N-containing electrocatalysts.
ISSN:1359-7345
1364-548X
DOI:10.1039/d3cc02693k