1] HeteroFoaM Center, a DOE Energy Frontier Research Center [2] Department of Mechanical Engineering, University of Connecticut.
Advanced Photon Source, Argonne National Laboratory.
Sci Rep. 2014 Jun 10;4:5246. doi: 10.1038/srep05246.
Following exposure to ppm-level hydrogen sulfide at elevated temperatures, a section of a solid oxide fuel cell (SOFC) Ni-YSZ anode was examined using a combination of synchrotron-based x-ray nanotomography and x-ray fluorescence techniques. While fluorescence measurements provided elemental identification and coarse spatial mapping, x-ray nanotomography was used to map the detailed 3-D spatial distribution of Ni, YSZ, and a nickel-sulfur poisoning phase. The nickel-sulfur layer was found to form a scale covering most of the exposed nickel surface, blocking most fuel reformation and hydrogen oxidation reaction sites. Although the exposure conditions precluded the ability to develop a detailed kinetic description of the nickel-sulfur phase formation, the results provide strong evidence of the detrimental effects of 100 ppm hydrogen sulfide on typical Ni-YSZ anode materials.
在高温下接触 ppm 级别的硫化氢后，使用同步加速器基 X 射线纳米断层扫描和 X 射线荧光技术组合检查了固体氧化物燃料电池 (SOFC) Ni-YSZ 阳极的一部分。荧光测量提供了元素识别和粗略的空间映射，而 X 射线纳米断层扫描则用于映射 Ni、YSZ 和镍-硫中毒相的详细 3D 空间分布。发现镍-硫层形成了一个覆盖大部分暴露镍表面的层，阻止了大多数燃料重整和氢气氧化反应的发生。尽管暴露条件排除了对镍-硫相形成的详细动力学描述的能力，但结果提供了 100ppm 硫化氢对典型 Ni-YSZ 阳极材料的有害影响的有力证据。
