التفاصيل البيبلوغرافية
| العنوان: |
Stabilizing Cu0-Cu+ sites by Pb-doping for highly efficient CO2 electroreduction to C2 products. |
| المؤلفون: |
Xiaodong Ma, Xinning Song, Libing Zhang, Limin Wu, Jiaqi Feng, Shunhan Jia, Xingxing Tan, Liang Xu, Xiaofu Sun, Buxing Han |
| المصدر: |
Green Chemistry; 10/7/2023, Vol. 25 Issue 19, p7635-7641, 7p |
| مصطلحات موضوعية: |
COUPLING reactions (Chemistry), ACTIVATION energy, RAMAN spectroscopy, CARBON cycle, X-ray absorption, ELECTROLYTIC reduction |
| مستخلص: |
The electrochemical CO2 reduction reaction (CO2RR) can convert CO2 to C2 hydrocarbons and oxygenate over Cu-based catalysts, and has great potential to store renewable energy and close the carbon cycle. Developing a facile method to modify the local electronic structure of Cu is a useful way to design efficient catalysts. Herein, we design a Pb-doping Cu2O catalyst with controllable Cu0-Cu+ sites. The catalyst generated a high C2 faradaic efficiency (FE) of 83.9% with a current density of 203.8 mA cm-2 at -1.1 V vs. RHE in a flow cell. In situ X-ray absorption spectroscopy and Raman spectroscopy revealed that the Pb doping in Cu2O could stabilize the Cu0-Cu+ structure and enhance the CO adsorption and C-C coupling, leading to high activity for C2 product formation. Theoretical calculations also show that Pb doping could reduce the energy barrier for both CO2 activation and C-C coupling processes. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
