Developing highly active and durable anodic catalysts with low noble-metal content for ethanol electrooxidation is important for boosting the performance of direct room-temperature ethanol fuel cells. Herein, we use a general and scalable dealloying method to prepare a series of nanoporous multicomponent alloys with different alloy compositions. It is found that the subsurface alloy composition play an important role on the catalytic activity of the surface noble metals due to the surface strain and electronic effect. By screening, we find that the AlNiCuPtPdCo senary combination exhibits the highest electrocatalytic activity for ethanol oxidation in alkaline media. On the cathode electrode, a highly ORR active, durable, and ethanol-tolerant Co@N–C catalyst derived from MOF is used. Impressively, the designed solid-state room-temperature ethanol fuel cell using such anodic and cathodic catalysts can work immediately with the addition of pure ethanol, delivering a high power density of ~9.20 mW cm⁻² with 1 mL ethanol. The flexible fuel cell can also work repeatedly when the added ethanol is consumed.

开发用于乙醇电氧化的贵金属含量低的高活性和耐用阳极催化剂对于提高直接室温乙醇燃料电池的性能非常重要。在此，我们使用通用且可扩展的脱合金方法来制备一系列具有不同合金成分的纳米多孔多组分合金。研究发现，由于表面应变和电子效应，次表面合金成分对表面贵金属的催化活性起着重要作用。通过筛选，我们发现 AlNiCuPtPdCo 三元组合在碱性介质中对乙醇氧化表现出最高的电催化活性。在阴极电极上，使用源自 MOF 的高 ORR 活性、耐用且耐乙醇的 Co@N-C 催化剂。令人印象深刻的是，^-2用 1 mL 乙醇。当添加的乙醇被消耗时，柔性燃料电池还可以重复工作。