Abstract Noble metal-based nanosheets are demonstrated as promising electrodes for energy electrocatalysis due to their remarkable advantages such as large surface area to volume ratio and high utilization efficiency of noble metals. In this work, three-dimensional layered palladium tungsten nanosheet assemblies (L-PdW NAs) have been successfully synthesized using a facile carbon monoxide (CO) confinement strategy, exhibiting much higher catalytic activity and stability toward both ethanol oxidation reaction (EOR) and methanol oxidation reaction (MOR) compared to palladium nanosheets (Pd NSs) and commercial Pd/C (Com Pd/C). It is discovered that the tungsten hexacarbonyl (W(CO)6) in the synthetic system displays a decisive key in forming the layered nanosheet structure. The catalytic enhancement mechanism should result the synergetic effects between the introduced W and novel architecture of layered nanosheet assembles. This work offers a low Pd loading, highly active and stable anode catalyst for direct alcohol fuel cells, while highlighting the beauty of the architecture with introduced W to significantly enhance the catalytic activity.

中文翻译：

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用于醇电氧化的分层 PdW 纳米片组件

摘要 贵金属基纳米片由于具有比表面积大、贵金属利用率高等显着优点，被证明是一种很有前景的能量电催化电极。在这项工作中，使用简便的一氧化碳 (CO) 限制策略成功合成了三维层状钯钨纳米片组件 (L-PdW NAs)，对乙醇氧化反应 (EOR) 和甲醇表现出更高的催化活性和稳定性氧化反应 (MOR) 与钯纳米片 (Pd NSs) 和商业 Pd/C (Com Pd/C) 相比。发现合成系统中的六羰基钨 (W(CO)6) 在形成层状纳米片结构中显示出决定性的关键。催化增强机制应导致引入的 W 与层状纳米片组装的新型结构之间的协同效应。这项工作为直接醇燃料电池提供了一种低 Pd 负载、高活性和稳定的阳极催化剂，同时突出了引入 W 以显着提高催化活性的结构之美。