Direct ethanol fuel cells have garnered considerable attention owing to their minimal pollution, high energy density and diverse fuel sources. However, the slow anodic ethanol oxidation reaction has limited its large-scale application. In this work, the green self-reduction method of Co(CO) as precursor and reducing agent is used to design PdCo bimetallene for ethanol oxidation reaction. The ultra-thin porous nanosheet structure of PdCo bimetallene leads to its abundant defects, facilitating increased active sites and enhanced electrical conductivity. The findings demonstrate substantial enhancements in both the activity and stability of the catalyst. The mass activity of PdCo bimetallene reached 1.58 A mg, marking a 2.8-fold increase compared to Pd black. Moreover, the catalyst maintained no less than 98% of the initial current over five consecutive 4000 s chronoamperometric tests, highlighting its remarkable stability. This work provides a green self-reduction synthesis strategy for the preparation of defect-rich bimetallene for ethanol electrocatalytic applications.

中文翻译：

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自还原策略构建的富缺陷PdCo双金属烯用于增强乙醇氧化反应

直接乙醇燃料电池由于其污染小、能量密度高和燃料来源多样化而受到广泛关注。然而，乙醇阳极氧化反应缓慢，限制了其大规模应用。本工作采用Co(CO)作为前驱体和还原剂的绿色自还原方法设计了用于乙醇氧化反应的PdCo双金属烯。 PdCo双金属烯的超薄多孔纳米片结构导致其丰富的缺陷，有利于增加活性位点并增强导电性。研究结果表明催化剂的活性和稳定性均得到显着增强。 PdCo双金属烯的质量活性达到1.58 A mg，比钯黑提高了2.8倍。此外，该催化剂在连续五次4000秒计时电流测试中仍保持不低于初始电流的98%，凸显了其卓越的稳定性。这项工作为制备用于乙醇电催化应用的富含缺陷的双金属烯提供了一种绿色自还原合成策略。