Developing highly efficient noble metal-free electrocatalysts for hydrogen oxidation reaction (HOR) and oxygen reduction reaction (ORR) in alkaline exchange membrane fuel cells (AEMFCs) is of great importance for the large-scale applications, which, however, still remains a great challenge. Here we present the synthesis of SnO₂ and CeO₂ nanoparticle-decorated mesoporous ZSM-5 (denoted as SnCe-ZSM) via electrostatic interaction, which, surprisingly, not only exhibits excellent catalytic activity towards HOR, but also largely enhance ORR performance. The strong electronic interaction between SnO₂ and CeO₂ nanoparticles synergistically leads to the electron-enrichment on SnO₂ and oxygen vacancy accumulation on CeO₂, which respectively enable the hydrogen and oxygen adsorption/activation concurrently, finally resulting in the significant enhancements of the electrocatalytic activity towards both HOR and ORR. Additionally, the SnCe-ZSM based zinc-air battery exhibits a remarkably high power density of 98 mW/cm² and excellent stability during discharging/charging cyclic tests for 60 h. The SnCe-ZSM electrocatalyst provides a significant paradigm for designing bifunctional composite catalysts for applications in clean energy devices.

开发用于碱性交换膜燃料电池（AEMFC）中的氢氧化反应（HOR）和氧还原反应（ORR）的高效无贵金属电催化剂对于大规模应用非常重要，然而，这仍然是一个很大的应用挑战。在这里，我们介绍了通过静电相互作用合成SnO ₂和CeO ₂纳米粒子修饰的介孔ZSM-5（表示为SnCe-ZSM），令人惊讶的是，它不仅表现出对HOR的优异催化活性，而且还大大增强了ORR性能。SnO ₂和CeO ₂纳米颗粒之间的强电子相互作用协同作用导致SnO ₂上的电子富集CeO ₂上的氧空位积累和氧空位积累，分别使氢和氧同时吸附/活化，最终导致对HOR和ORR的电催化活性显着增强。此外，基于SnCe-ZSM的锌空气电池还具有98 mW / cm ^2的极高功率密度，并且在60小时的充放电循环测试中具有出色的稳定性。SnCe-ZSM电催化剂为设计用于清洁能源设备的双功能复合催化剂提供了重要的范例。