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Rapid fabrication of FexNi2−xP4O12 and graphene hybrids as electrocatalyst for highly efficient oxygen evolution reaction
Applied Catalysis B: Environment and Energy ( IF 20.2 ) Pub Date : 2023-05-02 , DOI: 10.1016/j.apcatb.2023.122834
Lu Lin , Yufeng Wang , Qing Ye , Yanxia Zhao , Yongliang Cheng

Transition metal phosphates have been considered as a kind of promising electrocatalysts towards oxygen evolution reaction (OER), however, the unsatisfactory OER activity and tedious preparation process greatly restrict their further application. Herein, we report a novel microwave assistant strategy to fabricate graphene supported FexNi2−xP4O12 (FexNi2−xP4O12/RGO) hybrids as OER electrocatalyst. In alkaline solution, the optimized FexNi2−xP4O12/RGO merely needs low overpotential of 277, 340 and 380 mV to achieve 100, 500 and 1000 mA cm−2, respectively. Moreover, the electrolytic cell assembled by FexNi2−xP4O12/RGO and Pt/C only requires voltage of 1.549, 1.678 and 1.773 V to generate 100, 500 and 1000 mA cm−2, respectively, outperforming the electrolytic cell assembled by IrO2 and Pt/C. Durability test at 100 mA cm−2 for 100 h displays no obvious degradation of activity, confirming its outstanding stability. The strategy presented in this work affords a new avenue to fabricate high performance electrocatalysts.



中文翻译:

快速制备 FexNi2−xP4O12 和石墨烯杂化物作为高效析氧反应的电催化剂

过渡金属磷酸盐被认为是一种很有前途的析氧反应(OER)电催化剂,然而,不理想的OER活性和繁琐的制备过程极大地限制了它们的进一步应用。在此,我们报告了一种新型微波辅助策略来制备石墨烯负载的 Fe x Ni 2−x P 4 O 12 (Fe x Ni 2−x P 4 O 12 /RGO) 杂化物作为 OER 电催化剂。在碱性溶液中,优化的 Fe x Ni 2−x P 4 O 12/RGO 仅需要 277、340 和 380 mV 的低过电势即可分别达到 100、500 和 1000 mA cm -2此外,由 Fe x Ni 2−x P 4 O 12 /RGO 和 Pt/C组装的电解池仅需要 1.549、1.678 和 1.773 V 的电压即可分别产生 100、500 和 1000 mA cm -2,优于电解池由 IrO 2和 Pt/C 组装而成的电池。在 100 mA cm -2下持续 100 小时的耐久性测试显示活性没有明显下降,证实了其出色的稳定性。这项工作中提出的策略为制造高性能电催化剂提供了一条新途径。

更新日期:2023-05-05
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