Abstract In this work, we fabricated copper-1, 3, 5-benzenetricarboxylate framework nanocrystals on polyaniline (nano-Cu-BTCs/PANI) composites via a Layer-by-Layer (LbL) method. By increasing the number of LbL cycles, size and amount of the nano-Cu-BTCs in the composites were increased. The composite with more amounts of nano-Cu-BTCs exhibited larger surface areas and more increased electrical resistivity. The composites were investigated as electrocatalysts for oxygen reduction reaction (ORR) in 0.1 M KOH. Among the nano-Cu-BTCs(x wt%)/PANI (x = 8.2, 12, 20, and 37) composites, the composite with 12 wt% of Cu-BTC nanocrystals showed the best electrocatalytic activity for ORR, which would be mainly associated with destabilization of a OH2− intermediate, resulting in a further reduction reaction of the intermediate to OH− in the alkaline solution.

中文翻译：

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聚苯胺上的铜-1, 3, 5-苯三羧酸骨架纳米晶体：氧还原反应的制备、特性和电化学应用

摘要 在这项工作中，我们通过逐层 (LbL) 方法在聚苯胺 (nano-Cu-BTCs/PANI) 复合材料上制备了 1, 3, 5-苯三羧酸铜骨架纳米晶体。通过增加 LbL 循环次数，复合材料中纳米 Cu-BTC 的尺寸和数量增加。具有更多纳米 Cu-BTC 的复合材料表现出更大的表面积和更高的电阻率。研究了该复合材料作为 0.1 M KOH 中氧还原反应 (ORR) 的电催化剂。在纳米-Cu-BTCs(x wt%)/PANI (x = 8.2, 12, 20, and 37) 复合材料中，含有 12 wt% Cu-BTC 纳米晶的复合材料对 ORR 表现出最好的电催化活性，这将是主要与 OH2- 中间体的不稳定有关，导致中间体在碱性溶液中进一步还原为 OH-。