Abstract

A Ni–Cr anode, dip coated with Ce oxide for increasing the resistance to sulfur poisoning of high-temperature molten carbonate fuel cell, has been investigated by neutron diffraction. Crystallographic characterization of the phases present in this anode has been obtained by Rietveld refinement. In the substrate Ni–Cr is detected, with Fm\(\bar {3}\)m structure and weight volume fraction of 68.50(46) wt %. Additionally, due to oxidation during coating also NiO is present (space group Fm\(\bar {3}\)m), with weight volume fraction of 25.28(18) wt %. The thin protective layer consists of nanostructured CeO₂ (Fm\(\bar {3}\)m), with an estimated massive volume fraction of 6.3(5) wt %. These results support the effectiveness of the adopted CeO₂ deposition procedure and show the usefulness of neutron diffraction also for investigating thin protective layers.

中文翻译：

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熔融碳酸盐燃料电池镍铬阳极上沉积的CeO 2保护层的晶体学表征

摘要

通过中子衍射研究了一种Ni-Cr阳极，浸涂了Ce氧化物以增加其对高温熔融碳酸盐燃料电池的硫中毒的能力。存在于该阳极中的相的晶体学表征已经通过Rietveld精制获得。在基材中检测到Ni-Cr，Fm \（\ bar {3} \）m结构，重量体积分数为68.50（46）wt％。另外，由于在涂覆期间的氧化，还存在NiO（空间群Fm \（\ bar {3} \）m），其重量体积分数为25.28（18）wt％。薄保护层由纳米结构的CeO ₂（Fm \（\ bar {3} \）m），估计的总体积分数为6.3（5）wt％。这些结果证明了所采用的CeO ₂沉积程序的有效性，并表明中子衍射也可用于研究薄保护层。