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Prussian blue analogue derived Pd-Co composite bifunctional electrocatalyst for Zn–air battery
Journal of Alloys and Compounds ( IF 6.2 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.jallcom.2020.154896
Xianyi Liu , Juan Han , Jie Deng , Sarah Imhanria , Zongli Ren , Wei Wang

Abstract The development of economical and efficient bifunctional electrocatalyst is quite important for rechargeable zinc-air batteries (ZABs). Herein, a prussian blue analogue (Co3[Co(CN)6]2, PBA) derived PBA-Pd-Co/C composite electrocatalyst with good oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) electrocatalytic properties was developed via using bits of PdCl2 to modify carbonized Co3[Co(CN)6]2. The results show that as-prepared PBA-Pd-Co/C possesses good positive ORR half-wave potential (0.82 V), feasible OER potential (1.73 V) of 10 mA cm−2, minor ORR and OER Tafel slopes (53.61 and 57.07 mV dec−1), as well as high ZAB power density (138.8 mW cm−2) and good galvanostatic charge-discharge cycling stability. These good performances of PBA-Pd-Co/C are mainly ascribed to the good synergistic effect of Co and Pd nanoparticles (NPs) composited in PBA-derived nitrogen-enriched graphite carbon. This work would be supportive of expanding other low-cost and high-efficiency PBA-derived electrocatalysts in the future.

中文翻译:

普鲁士蓝类似物衍生的Pd-Co复合双功能锌空气电池电催化剂

摘要 开发经济高效的双功能电催化剂对于可充电锌空气电池(ZABs)具有重要意义。在此,通过使用普鲁士蓝类似物(Co3[Co(CN)6]2,PBA)衍生的PBA-Pd-Co/C复合电催化剂,具有良好的氧还原反应(ORR)和析氧反应(OER)电催化性能。少量 PdCl2 来修饰碳化的 Co3[Co(CN)6]2。结果表明,所制备的 PBA-Pd-Co/C 具有良好的正 ORR 半波电位(0.82 V),可行的 OER 电位(1.73 V)为 10 mA cm−2,较小的 ORR 和 OER Tafel 斜率(53.61 和57.07 mV dec-1),以及高 ZAB 功率密度 (138.8 mW cm-2) 和良好的恒电流充放电循环稳定性。PBA-Pd-Co/C 的这些良好性能主要归功于复合在 PBA 衍生的富氮石墨碳中的 Co 和 Pd 纳米粒子(NPs)的良好协同效应。这项工作将支持未来扩展其他低成本、高效的 PBA 衍生电催化剂。
更新日期:2020-08-01
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