Three-dimensional catalyst electrodes based on PtPd nanodendrites for oxygen reduction reaction in PEFC applications
Three-dimensional catalyst electrodes based on PtPd nanodendrites for oxygen reduction reaction in PEFC applications
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DOI：
10.1016/j.apcatb.2016.01.019
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发表时间：
2016-06-15
影响因子：
22.1
通讯作者：
Steinberger-Wilckens, Robert
中科院分区：
文献类型：
--
作者：
Lu, Yaxiang;Du, Shangfeng;Steinberger-Wilckens, Robert
PtPd双金属纳米枝晶（NDs）具有PtPd比元素Pt更强的活性和独特的各向异性形态，在燃料电池中具有潜在的催化剂应用前景。然而，研究仅限于纯材料，从PtPd nd中构建实用的燃料电池催化剂电极仍然是一个挑战。在本文中，我们首次展示了PtPd NDs用于聚合物电解质燃料电池（PEFC）的催化剂电极。PtPd NDs在大面积碳纸气体扩散层（gdl）上原位生长，并直接用作H-2/空气中的阴极。pefc。与纯Pt纳米线和Pt/C纳米颗粒电催化剂相比，具有PtPd纳米枝晶的薄催化剂层显著降低了传质阻力，并且具有更高的功率性能。基于时间相关实验和Pd含量，详细分析了这种先进纳米结构在大面积载体上的晶体生长机制。(C) 2016 Elsevier B.V.版权所有
PtPd bimetallic nanodendrites (NDs), with enhanced activities from PtPd over element Pt and unique anisotropic morphology, show potential as catalysts in fuel cell applications. However, the research has been limited to pure materials, and constructing a practical fuel cell catalyst electrode from PtPd NDs still remains as a challenge. In this paper, we demonstrated, for the first time, catalyst electrodes from PtPd NDs for polymer electrolyte fuel cell (PEFC) applications. PtPd NDs are in-situ grown on large-area carbon paper gas diffusion layers (GDLs) and directly employed as cathodes in H-2/air. PEFCs. The thin catalyst layer with PtPd nanodendrites significantly reduces mass transfer resistance and a higher power performance is achieved than those based on pure Pt nanowires and Pt/C nanoparticle electrocatalysts. The crystal growth mechanisms of this advanced nanostructure on large-area support are also detailed based on the time-dependent experiments and Pd content. (C) 2016 Elsevier B.V. All rights reserved.