The direct formate fuel cells (DFFCs) are energy conversion devices that use formate as fuel. However, CO_ads generated from formate dehydration accumulate on the Pd surface and cause catalyst poisoning and deactivation. Here, we constructed a hydrogen intercalated palladium-copper metallene (PdCuH metallene) to enhance the anti-CO poisoning ability. For formate oxidation, the mass and specific activities of PdCuH metallene/C were 3.4 and 3.2 times those of Pd/C. While in ORR, the mass and specific activities of PdCuH metallene reached 12.4 and 13.9 times that of Pt/C. When we assembled PdCuH metallene/C as an electrode material for DFFC, the peak power and limiting current density of PdCuH metallene/C || PdCuH metallene/C were 79.5% and 159.7% higher than that of Pt/C || Pd/C, respectively. This study provides a new resolution to address the CO poisoning deactivation of direct formate fuel cell catalysts.

直接甲酸盐燃料电池（DFFC）是使用甲酸盐作为燃料的能量转换装置。然而，CO_广告甲酸盐脱水产生的残留物积聚在Pd表面，导致催化剂中毒和失活。在这里，我们构建了一种氢插层钯铜金属烯（PdCuH金属烯）来增强抗CO中毒能力。对于甲酸盐氧化，PdCuH金属烯/C的质量和比活度分别是Pd/C的3.4和3.2倍。而在ORR中，PdCuH金属烯的质量和比活度分别达到Pt/C的12.4和13.9倍。当我们组装PdCuH金属烯/C作为DFFC的电极材料时，PdCuH金属烯/C的峰值功率和极限电流密度|| PdCuH metalene/C 分别比 Pt/C 高 79.5% 和 159.7% || 分别为 Pd/C。这项研究为解决直接甲酸盐燃料电池催化剂的CO中毒失活问题提供了新的解决方案。