| DOI | Trouver le DOI : https://doi.org/10.1021/acsenergylett.9b00699 |
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| Auteur | Rechercher : Yao, Yao; Rechercher : Wang, Haijiang1; Rechercher : Yuan, Xiao-Zi1; Rechercher : Li, Hui1; Rechercher : Shao, MinhuaIdentifiant ORCID : https://orcid.org/0000-0003-4496-0057 |
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| Affiliation | - Conseil national de recherches Canada. Énergie, les mines et l'environnement
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| Format | Texte, Article |
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| Résumé | Ruthenium is a good catalyst for ammonia synthesis in the Haber–Bosch process and a promising electrocatalyst for electrochemical N2 reduction reaction (NRR). However, the NRR pathway on Ru is unclear because of the lack of information on reaction intermediates. Surface-enhanced infrared absorption spectroscopy combined with electrochemical measurements is employed to study the NRR mechanisms on Ru thin film. During the nitrogen reduction, the *N₂Hₓ (0 ≤ x ≤ 2) was detected with the band of N=N stretching (∼1940 cm⁻¹) at potentials below 0.2 V in an N₂-satureated HClO₄ solution. The coverage of *N₂Hₓ on the Ru surface was significantly increased with the potential decreasing from 0.2 to −0.4 V. The formed *N₂Hₓ species could be oxidized at potentials higher than −0.1 V. In an N₂-satureated KOH solution, no N-related infrared absorption band was observed on Ru surfaces, indicating that the adsorption of nitrogen molecules on Ru surfaces is very weak. |
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| Date de publication | 2019-05-16 |
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| Maison d’édition | American Chemical Society |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 2afce02a-a776-49b2-bcf7-ca0f09279644 |
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| Enregistrement créé | 2021-03-02 |
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| Enregistrement modifié | 2021-03-02 |
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