التفاصيل البيبلوغرافية
| العنوان: |
Cobalt vanadate nano/microrods as high-efficiency dual-functional electrocatalyst for hydrogen evolution and urea-assisted alkaline oxygen evolution reaction. |
| المؤلفون: |
Wang, Xuejiao1,2 (AUTHOR), Huang, Yu1 (AUTHOR), Zhu, Jikui1,2 (AUTHOR), Zhao, Zhuyi1 (AUTHOR), Zhao, Jianbo1,2 (AUTHOR) zjb1102@outlook.com, Zhang, Jingjing1,2 (AUTHOR) jjzhang@taru.edu.cn |
| المصدر: |
International Journal of Hydrogen Energy. Oct2024, Vol. 88, p78-85. 8p. |
| مصطلحات موضوعية: |
*CATALYTIC activity, *SOL-gel processes, *COBALT, *ELECTROCATALYSTS, *ELECTROLYSIS |
| مستخلص: |
It is vital to develop non-precious metal materials as dual-functional hydrogen evolution reaction (HER) and urea oxidation reaction (UOR) catalysts for water splitting. Herein, cobalt vanadate (CVO) nano/microrods electrocatalysts have been successfully synthesized by combining the sol-gel and pyrolysis method for HER and UOR. CVO-500 with the pyrolysis temperature at 500 °C shows optimal catalytic activity toward HER and UOR, which just needs overpotentials of 91.4 and 53.6 mV at 10 mA/cm2, respectively. In addition, it displays surpassing stability for uninterrupted HER and UOR. The CVO-500 catalyst as the anode and cathode for overall urea electrolysis only requires the voltage of 1.51 V to deliver 10 mA/cm2 with excellent stability in 1.0 M KOH with 0.33 M urea solution. The results suggest that cobalt vanadate nano/microrods with considerable catalytic performance as high-efficiency dual-functional electrocatalyst is believed as promising candidate to replace precious materials. [Display omitted] • Cobalt vanadate electrocatalysts have been successfully synthesized by combining the sol-gel and pyrolysis method. • Cobalt vanadate with the pyrolysis temperature at 500 °C (CVO-500) presents even and regular nano/microrods morphology. • The optimal CVO-500 shows overpotentials of 91.4 and 119.6 mV at 10 mA/cm2 for HER and UOR, respectively. • CVO-500 possesses conspicuous durability during sustaining HER and UOR. • CVO-500 catalyst for overall urea electrolysis requires the voltage of 1.51 V to deliver 10 mA/cm2 with excellent stability. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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