Electrochemical Reduction of N2 into NH3 by Donor–Acceptor Couples of Ni and Au Nanoparticles with a 67.8% Faradaic Efficiency
| Autor: | Hui Su, Xin-Hao Li, Qiu-Ying Yu, Jing-Tan Han, Guang-Yao Zhai, Zhong-Hua Xue, Yun-Xiao Lin, Markus Antonietti, Shi-Nan Zhang, Jie-Sheng Chen |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_element
Nanoparticle General Chemistry 010402 general chemistry Electrochemistry 01 natural sciences Biochemistry Nitrogen Redox Catalysis 0104 chemical sciences Reduction (complexity) Colloid and Surface Chemistry chemistry Chemical engineering Selectivity Carbon Faraday efficiency |
| Zdroj: | Journal of the American Chemical Society. 141:14976-14980 |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/jacs.9b07963 |
| Popis: | The traditional NH3 production method (Haber-Bosch process) is currently complemented by electrochemical synthesis at ambient conditions, but the rather low selectivity (as indicated by the Faradaic efficiency) for the electrochemical reduction of molecular N2 into NH3 impedes the progress. Here, we present a powerful method to significantly boost the Faradaic efficiency of Au electrocatalysts to 67.8% for the nitrogen reduction reaction (NRR) by increasing their electron density through the construction of inorganic donor-acceptor couples of Ni and Au nanoparticles. The unique role of the electron-rich Au centers in facilitating the fixation and activation of N2 was also investigated via theoretical simulation methods and then confirmed by experimental results. The highly coupled Au and Ni nanoparticles supported on nitrogen-doped carbon are stable for reuse and long-term performance of the NRR, making the electrochemical process more sustainable for practical application. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|