, Volume 71, Issue 1, pp 124–130 | Cite as

Low-Cost Getters for Gaseous Chromium Removal in High-Temperature Electrochemical Systems

  • Ashish Aphale
  • Boxun Hu
  • Prabhakar Singh
Advancement in Solid Oxide Fuel Cell Research


Electrochemical performance degradation of the air electrode due to the presence of trace levels of gaseous chromium impurities, a critical issue in high-temperature electrochemical systems, contributes to long-term irreversible performance instabilities. We report a low-cost getter comprised of SrO and NiO to capture extrinsic chromium impurities present in ambient air. Ceramic honeycomb-supported getters have been tested for 500 h under SOFC cathode exposure conditions and characterized by scanning electron microscopy–energy dispersive X-ray spectrometry and focused ion beam–transmission electron microscopy. Chemical and structural analyses show that gaseous chromium predominantly concentrates within ~ 4–5 mm at the air inlet, leaving only the remainder of the getter free of chromium. Chromium capture mechanisms are proposed and discussed based on experimental findings and thermodynamic calculations.



The authors acknowledge the financial support from the US Department of Energy and National Energy Technological Laboratory under federal Grant DE-FE 0023385. Technical discussion with Dr. Patcharin Burke (NETL) is gratefully acknowledged. The authors also acknowledge Dr. Lichun Zhang and Ms. Chiying Liang for their help with SEM–EDS and FIB-TEM experiments.


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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  1. 1.Department of Materials Science and Engineering, Center for Clean Energy EngineeringUniversity of ConnecticutStorrsUSA

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