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Efficient Ammonia Synthesis from Nitrate Catalyzed by Au/Cu with Enhanced Adsorption Ability
- Source :
- Small Structures, Vol 4, Iss 4, Pp n/a-n/a (2023)
- Publication Year :
- 2023
- Publisher :
- Wiley-VCH, 2023.
-
Abstract
- The traditional method for synthesizing NH3 is the Haber–Bosch process which results in high‐fuel consumption and environmental pollution. Therefore, ecofriendly electrochemical synthesis of NH3 through nitrate (NO3−) reduction is a good choice. Herein, an integral Au/Cu electrode to catalyze NO3− reduction to NH3 is introduced. The catalyst exhibits not only the highest NH3 yield rate (73.4 mg h−1 cm−2) up to now but also a very high Faradaic efficiency of 98.02% at −0.7 V at room temperature. It is commonly believed that the transformation of NO3− to nitrite (NO2−) is an obstacle to the NH3 generation from NO3− reduction. Surprisingly, unlike most of the other catalysts, Au/Cu exhibits better activity for NO3− reduction than that for NO2− reduction. Based on the detailed experimental and density functional theory calculations, the excellent performance of Au/Cu for selective NO3− reduction lies in the enhanced adsorption capabilities of Au/Cu to NO3− in the alkaline environment and the lower energy barriers of the electrochemical reduction reaction.
Details
- Language :
- English
- ISSN :
- 26884062 and 20220030
- Volume :
- 4
- Issue :
- 4
- Database :
- Directory of Open Access Journals
- Journal :
- Small Structures
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.00a7e077ea5744f5b1a96113c0b07ca5
- Document Type :
- article
- Full Text :
- https://doi.org/10.1002/sstr.202200308