Efficient ethanol oxidation reaction (EOR) catalysts with anti‐poisoning ability and high selectivity are in high demand for the widespread application of direct ethanol fuel cells (DEFCs). Here, the PdSnW ternary alloy nanoparticles are synthesized by a facile solvothermal method and exhibit an enhanced EOR catalytic performance. CO stripping experiment, X‐ray photoelectron spectroscopy and in situ Fourier transform infrared are employed to study the correlation between catalyst structure and EOR catalytic performance. The oxyphilic Sn and W not only provide dangling O‐H bond, accelerating the subsequent oxidation of adsorbed intermediate CO species, but also moderate the electron state of Pd, enhancing the adsorption of CH3CH2OH, thus resulting in the promotion of C‐C bond cleavage and an increased C1 selectivity. As a consequence, PdSnW alloy nanoparticle catalyst exhibit a better stability and a higher mass activity than those of Pd/C, PdSn and PdW, respectively. This work not only offers novel insights to strategically design highly efficient electrocatalysts for ethanol oxidation, but also further clarifies the inherent structure‐activity relationship.

中文翻译：

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PdSnW三元合金纳米粒子具有优异的抗CO中毒活性，可促进碱性乙醇氧化反应

直接乙醇燃料电池（DEFC）的广泛应用迫切需要具有抗中毒能力和高选择性的高效乙醇氧化反应（EOR）催化剂。在这里，PdSnW 三元合金纳米颗粒是通过简单的溶剂热方法合成的，并表现出增强的 EOR 催化性能。采用CO剥离实验、X射线光电子能谱和原位傅里叶变换红外研究了催化剂结构与EOR催化性能之间的相关性。亲氧性的Sn和W不仅提供悬挂的O-H键，加速吸附中间CO物种的后续氧化，而且调节Pd的电子态，增强CH3CH2OH的吸附，从而促进C-C键断裂和增加的 C1 选择性。因此，PdSnW合金纳米粒子催化剂分别比Pd/C、PdSn和PdW表现出更好的稳定性和更高的质量活性。这项工作不仅为战略性设计用于乙醇氧化的高效电催化剂提供了新颖的见解，而且还进一步阐明了固有的构效关系。