The direct formic acid fuel cell (DFAFC), with its high energy conversion efficiency, high energy density, rapid startup at room temperature, and other excellent features, is considered one of the most promising sources of green energy. Here, coral-like PdCu bimetallic nanoparticles with large surface areas were successfully designed and fabricated via a simple approach and were used as an efficient electrocatalyst for formic acid oxidation (FAO). Introduction of Cu atoms into coral-like PdCu bimetallic nanoparticles not only affects the d-band centers of active sites by enhancing the catalytic performance but can also adjust the morphology to provide increased specific surface area. In addition, the electrocatalytic activity of the obtained PdCu/C was well optimized in FAO by tuning the composition of the metallic elements and the ratio of catalyst supports. The optimal electrocatalyst has an electrochemically active area of 36.34 m² g^–1 and a mass activity of 1.05 A g_Pd^–1, which are approximately 2 and 3.5 times higher than the values from commercial Pd/C, respectively. Most importantly, the chronoamperometry curve remained above 60% after 400 s, which is dramatically increased compared with Pd/C (<2.5%), illustrating the high stability of the PdCu bimetallic nanoparticle catalyst.

中文翻译：

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珊瑚状PdCu合金纳米颗粒可作为高效甲酸氧化的稳定电催化剂

直接甲酸燃料电池（DFAFC）具有高的能量转换效率，高的能量密度，在室温下快速启动以及其他出色的功能，被认为是最有前途的绿色能源之一。在这里，通过简单的方法成功设计和制造了具有大表面积的珊瑚状PdCu双金属纳米颗粒，并被用作甲酸氧化（FAO）的有效电催化剂。将铜原子引入珊瑚状PdCu双金属纳米颗粒中，不仅可以通过增强催化性能来影响活性位点的d带中心，还可以调节形态以提供增加的比表面积。此外，在粮农组织中，通过调节金属元素的组成和催化剂载体的比例，可以很好地优化所获得的PdCu / C的电催化活性。最佳的电催化剂具有36.34 m的电化学活性面积² g ^–1和1.05 A g _Pd ^–1的质量活度，分别比商业Pd / C值高2到3.5倍。最重要的是，计时电流法曲线在400 s后仍保持在60％以上，这与Pd / C（<2.5％）相比显着增加，说明了PdCu双金属纳米颗粒催化剂的高稳定性。