With the combination of the advantages of both Zn–Ag and Zn–air batteries, hybrid Zn–Ag/Zn–air batteries nevertheless suffer greatly from structural instability and activity degradation of the catalysts at the air electrodes. Herein, we introduce a scalable chemical dealloying procedure to synthesize mutually interacting and stable bifunctional catalysts, consisting of imbedded Ag nanoparticles for the oxygen reduction reaction (ORR) and quantitatively designed multicomponent high-entropy oxides (HEOs) for the oxygen evolution reaction (OER). The ORR performance and the Zn–Ag battery capacity can be precisely controlled by the content of Ag nanoparticles. Impressively, with a significantly low Ag content (∼9.13 wt%) in the bifunctional (AlNiCoFeCr)₃O₄/Ag, our hybrid Zn–Ag/Zn–air batteries using such catalysts are able to be continuously charged/discharged for more than 450 h and deliver a high energy density of 810 W h kg⁻¹. We expect that these stabilized noble metals in HEO nanocomposites may work as multifunctional electrocatalysts in many other energy conversion devices.

中文翻译：

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Ag纳米颗粒与高熵氧化物原位偶联作为可穿戴Zn-Ag/Zn-空气混合电池的高度稳定双功能催化剂

结合锌-银和锌-空气电池的优点，混合锌-银/锌-空气电池仍然存在结构不稳定性和空气电极催化剂活性降低的问题。在此，我们引入了一种可扩展的化学脱合金程序来合成相互作用和稳定的双功能催化剂，包括用于氧还原反应 (ORR) 的嵌入银纳米粒子和用于析氧反应 (OER) 的定量设计的多组分高熵氧化物 (HEO) . ORR性能和Zn-Ag电池容量可以通过Ag纳米颗粒的含量来精确控制。令人印象深刻的是，双功能 (AlNiCoFeCr) ₃ O _{4 中的}Ag 含量非常低（~9.13 wt%）/Ag，我们使用这种催化剂的混合锌-银/锌-空气电池能够连续充电/放电超过 450 小时，并提供 810 W h kg ^-1的高能量密度。我们预计 HEO 纳米复合材料中的这些稳定的贵金属可以在许多其他能量转换装置中用作多功能电催化剂。