To obtain highly efficient and robust electrocatalysts for formic acid oxidation, Pd_xCu_y/C binary catalysts with porous structures were successfully prepared via electrochemical dealloying. Catalysts with different Pd/Cu atomic ratios were characterized through transmission electron microscopy, inductively coupled plasma atomic emission spectroscopy, and X-ray diffraction. The optimized dealloyed Pd₁Cu₄/C catalyst with a porous structure displayed a catalytic activity of 2611 A g⁻¹ and high stability (30.5% activity retention under repeated cyclic voltammetric (CV) patrol), whereas a commercial Pd/C-Aldrich benchmark showed a catalytic activity of 785 A g⁻¹ and retained 16.5% activity. A detailed mechanistic study of electrochemical dealloying was performed. Under repeated CV patrol, Pd-enriched porous architectures evolved from Pd-poor surfaces, accompanied by successive Cu dissolution.

Graphical abstract

中文翻译：

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鲁棒高效的具有多孔结构的Pd-Cu双金属催化剂用于甲酸氧化和电化学脱合金机理的研究

为获得高效，强健的甲酸氧化电催化剂，通过电化学脱合金法成功制备了具有多孔结构的Pd _x Cu _y / C二元催化剂。通过透射电子显微镜，电感耦合等离子体原子发射光谱和X射线衍射对具有不同Pd / Cu原子比的催化剂进行了表征。具有多孔结构的优化脱合金Pd ₁ Cu ₄ / C催化剂表现出2611 A g ^-1的催化活性和高稳定性（在重复循环伏安法（CV）巡逻下保持30.5％的活性），而市售Pd / C-Aldrich基准显示出785 A g ^-1的催化活性并保留16.5％的活性。进行了电化学脱合金的详细机理研究。在反复的CV巡逻下，富含Pd的多孔结构从贫Pd的表面演变而来，并伴随有连续的Cu溶解。

图形概要