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首页> 外文期刊>Chemistry: A European journal >Pt-Pd-Co Trimetallic Alloy Network Nanostructures with Superior Electrocatalytic Activity towards the Oxygen Reduction Reaction
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Pt-Pd-Co Trimetallic Alloy Network Nanostructures with Superior Electrocatalytic Activity towards the Oxygen Reduction Reaction

机译：Pt-Pd-Co三金属合金网络纳米结构对氧还原反应具有优异的电催化活性

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摘要

Pt alloy nanostructures show great promise as electrocatalysts for the oxygen reduction reaction (ORR) in fuel cell cathodes. Herein, three-dimensional (3D) Pt-Pd-Co trimetallic network nanostructures (TNNs) with a high degree of alloying are synthesized through a room temperature wet chemical synthetic method by using K_2PtCl_4/ K_3Co(CN)_6–K_2PdCl_4/K_3Co(CN)_6 mixed cyanogels as the reaction precursor in the absence of surfactants and templates. The size, morphology, and surface composition of the Pt-Pd- Co TNNs are investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected-area electron diffraction (SAED), energy dispersive spectroscopy (EDS), EDS mapping, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The 3D backbone structure, solid nature, and trimetallic properties of the mixed cyanogels are responsible for the 3D structure and high degree of alloying of the as-prepared products. Compared with commercially available Pt black, the Pt-Pd-Co TNNs exhibit superior electrocatalytic activity and stability towards the ORR, which is ascribed to their unique 3D structure, low hydroxyl surface coverage and alloy properties.
机译：铂合金纳米结构作为燃料电池阴极中氧还原反应（ORR）的电催化剂具有广阔的前景。在此，使用K_2PtCl_4 / K_3Co（CN）_6-K_2PdCl_4 / K_3Co（CN ）_6在没有表面活性剂和模板的情况下，混合氰基凝胶作为反应前体。通过扫描电子显微镜（SEM），透射电子显微镜（TEM），选择区域电子衍射（SAED），能量色散光谱（EDS）和EDS对Pt-Pd-Co TNN的尺寸，形态和表面组成进行了研究测绘，X射线衍射（XRD）和X射线光电子能谱（XPS）。混合氰化物的3D主链结构，固体性质和三金属性质是所制备产品的3D结构和高度合金化的原因。与市售Pt黑相比，Pt-Pd-Co TNN具有优异的电催化活性和对ORR的稳定性，这归因于其独特的3D结构，低羟基表面覆盖率和合金性能。

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