Te-Doped Pd Nanocrystal for Electrochemical Urea Production by Efficiently Coupling Carbon Dioxide Reduction with Nitrite Reduction
| Autor: | Xiaoqing Huang, Tao Cheng, Hao Yang, Yonggang Feng, Qi Shao, Ying Zhang, Leigang Li |
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| Rok vydání: | 2020 |
| Předmět: |
Chemistry
Mechanical Engineering Bioengineering 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry Carbon utilization chemistry.chemical_compound Adsorption Urea Reversible hydrogen electrode General Materials Science Nitrite 0210 nano-technology Faraday efficiency Electrochemical reduction of carbon dioxide Nuclear chemistry |
| Zdroj: | Nano Letters. 20:8282-8289 |
| ISSN: | 1530-6992 1530-6984 |
| Popis: | The renewable electricity-driven reduction of carbon dioxide (CO2RR) is a promising technology for carbon utilization. However, it is still a challenge to broaden the application of CO2RR. Herein, we report a Te-doped Pd nanocrystals (Te-Pd NCs) for promoting urea synthesis by coupling CO2RR with electrochemical reduction of nitrite. The electrochemical synthesis of urea has been achieved with nearly 12.2% Faraday efficiency (FE) and 88.7% N atom efficiency (NE) at -1.1 V versus reversible hydrogen electrode (vs RHE), much higher than those of pure Pd NCs (4.2% FE and 21.8% NE). Significantly, an FE of ∼10.2% and an NE of ∼82.3% for urea solution production via an optimized flow cell system have been realized, where a solution with up to 0.95 wt % of urea has been obtained. Mechanistic insights show that Te-doping not only optimizes the CO2/CO adsorption but also promotes NH3 production, fully meeting the requirements of urea synthesis. |
| Databáze: | OpenAIRE |
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