2012•Unpublished venueRequires access
The Role of Sulfur in the Porous Cermet Solid Oxide Fuel Cell Anode Microstructure
Jeffrey J. Lombardo, Barry Lai, William M. Harris, George J. Nelson, Steve Wang, Mingfei Liu, Meilin Liu, Wilson K. S. Chiu
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Abstract
Sulfur poisoning can deactivate nickel catalysts in solid oxide fuel cells (SOFCs), resulting in a significant drop in fuel cell performance. In this paper, a Ni/YSZ SOFC anode exposed to 100 ppm H2S was examined using x-ray absorption contrast imaging for its microstructure and x-ray fluorescence (XRF) spectroscopy to probe and map Ni, S, and YSZ phases. It was observed that S was frequently found to be collocated with Ni, with higher concentrations being located on or near the surface of the Ni particles exposed to gas, while little S was found near the YSZ phase.Copyright © 2012 by ASME