We, for the first time, report the successful synthesis of self‐assembled AuCu aerogels by a one‐pot kinetically controlled approach. A startling electronic modulation effect of Cu on Au was observed across the entire alloy composition range, for which the optimal upshift of the d‐band center for the highest activities was 0.24 eV. Owing to the combination of a nanoporous architecture and a robust electronic effect, the Au₅₂Cu₄₈ aerogels exhibited better catalytic performance for the oxygen reduction reaction (ORR) and the direct borohydride oxidation reaction (BOR) than commercial Pt/C catalysts. The specific and mass ORR activities were 4.5 and 6.3 times higher, respectively, on the Au₅₂Cu₄₈ aerogels than on Pt/C with negligible activity decay even after 10 000 cycles and a duration of 40 000 s. For the BOR, the Au₅₂Cu₄₈ aerogels also exhibited far better selectivity and activity than Pt/C. The new AuCu aerogels show great potential as a promising alternative for Pt‐based catalysts in fuel cells.

中文翻译：

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具有吸引力的表面电子调制的金铜气凝胶，是用于氧还原和硼氢化物氧化的高活性和稳定的电催化剂

我们首次报告了通过单锅动力学控制方法成功合成自组装AuCu气凝胶。在整个合金成分范围内，观察到了铜对金的惊人电子调制效应，为此，最高活性的d波段中心的最佳上移为0.24 eV。由于纳米多孔结构和强大的电子效应的结合，Au ₅₂ Cu ₄₈气凝胶对氧还原反应（ORR）和直接硼氢化物氧化反应（BOR）的催化性能优于市售Pt / C催化剂。Au ₅₂ Cu ₄₈的比和质量ORR活性分别高4.5和6.3倍即使在10 000次循环和持续40000 s的时间后，活性比Pt / C更高的气凝胶的衰减也可以忽略不计。对于BOR，Au ₅₂ Cu ₄₈气凝胶还显示出比Pt / C更好的选择性和活性。新型AuCu气凝胶具有巨大的潜力，可作为燃料电池中基于Pt的催化剂的有前途的替代品。