| Autor: |
Zhu, Yan, Zhang, Nan, Zhang, Wenyu, Zhao, Ling, Gong, Yansheng, Wang, Rui, Wang, Huanwen, Jin, Jun, He, Beibei |
| Zdroj: |
ACS Applied Materials & Interfaces; 20240101, Issue: Preprints |
| Abstrakt: |
Solid oxide electrolysis cells (SOECs) show significant promise in converting CO2to valuable fuels and chemicals, yet exploiting efficient electrode materials poses a great challenge. Perovskite oxides, known for their stability as SOEC electrodes, require improvements in electrocatalytic activity and conductivity. Herein, vanadium(V) cation is newly introduced into the B-site of Sr2Fe1.5Mo0.5O6-δperovskite to promote its electrochemical performance. The substitution of variable valence V5+for Mo6+along with the creation of oxygen vacancies contribute to improved electronic conductivity and enhanced electrocatalytic activity for CO2reduction. Notably, the Sr2Fe1.5Mo0.4V0.1O6-δbased symmetrical SOEC achieves a current density of 1.56 A cm–2at 1.5 V and 800 °C, maintaining outstanding durability over 300 h. Theoretical analysis unveils that V-doping facilitates the formation of oxygen vacancies, resulting in high intrinsic electrocatalytic activity for CO2reduction. These findings present a viable and facile strategy for advancing electrocatalysts in CO2conversion technologies. |
| Databáze: |
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