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首页> 外文期刊>Journal of power sources >Novel composite anode with CO 'Filter' layers for PEFC
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Novel composite anode with CO 'Filter' layers for PEFC

机译：用于PEFC的带有CO“过滤”层的新型复合阳极

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摘要

This study proposes a novel anode catalyst layer structure to improve the CO tolerance and cell performance. A layered structure is composed of an outer and an inner catalyst layer. The outer catalyst layer acts as a CO barrier and consists of a nano Ru/Pt layer (0.06 mg cm~(-2)) deposited by magnetron sputtering and a Pt_(50)-Ru_(50) layer (0.10mg cm~(-2)) applied by screen-printing to the GDL. The inner catalyst layer is a pure Pt layer (0.07 mg cm~(-2)) produced by a direct-printing method onto the PEM. The roles of outer and inner catalyst layers which improve the CO tolerance and cell performance are investigated in this paper. SEM, X-ray, EDS and EPMA analyses were used to characterize microstructures, phases, chemical composition and distributions of the obtained electrocatalyst layers. Hydrogen containing 50ppm CO is continuously fed to the anode side to investigate the relationships. The MEAs consist of a Nafion 117 membrane and a commercial electrocatalyst (20 percent Pt/C from E-TEK) on the cathode side. The results demonstrate that this proposed anode catalyst layer structure exhibits a superior performance and CO tolerance capability in pure hydrogen and CO containing hydrogen fuels. The improved CO tolerance capability is attributed to the filtering effect of the outer catalyst layer.
机译：这项研究提出了一种新型的阳极催化剂层结构，以提高CO耐受性和电池性能。层状结构由外催化剂层和内催化剂层组成。外部催化剂层用作CO阻挡层，由磁控溅射沉积的纳米Ru / Pt层（0.06 mg cm〜（-2））和Pt_（50）-Ru_（50）层（0.10mg cm〜（ -2））通过丝网印刷应用于GDL。内催化剂层是通过直接印刷到PEM上的纯Pt层（0.07mg cm-（-2））。本文研究了内外催化剂层在提高CO耐受性和电池性能方面的作用。 SEM，X射线，EDS和EPMA分析被用来表征所获得的电催化剂层的微观结构，相，化学组成和分布。将含50ppm CO的氢连续供入阳极侧以研究其关系。 MEAs由Nafion 117膜和在阴极侧的商用电催化剂（来自E-TEK的20％Pt / C）组成。结果表明，该提出的阳极催化剂层结构在纯氢和含CO的氢燃料中表现出优异的性能和CO耐受能力。改善的CO耐受能力归因于外部催化剂层的过滤效果。

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