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Polarization-Induced Interfacial Reactions between Nickel and Sulfur in Fuel Cell Electrodes and Mitigation of Sulfur Poisoning via Ni Surface Modification


EMSL Project ID
46402

Abstract

The purpose of this project is 1) to gain understanding how the electrode chemistry is affected by exposure to fuel gas impurities under polarization, and 2) how to efficiently minimize the negative effects of sulfur on the performance of fuel cell electrodes. Morphological and compositional changes induced by impurity interactions and changes in the adsorptive properties will be correlated with the electrochemical performance of affected electrodes. This research will lead to understanding of poisoning mechanisms, whether competitive adsorption effects are present, preferred adsorptive sites, or whether secondary phases are formed. Eventually, this research will lead to the development of electrode compositions and structures with improved tolerance to sulfur. This proposal will support the current effort on the development of the sulfur tolerant SOFC anodes and can have a positive impact on other nickel-based catalysts and electrocatalysts.

Project Details

Project type
Exploratory Research
Start Date
2011-12-02
End Date
2012-12-02
Status
Closed

Team

Principal Investigator

Olga Marina
Institution
Pacific Northwest National Laboratory

Team Members

Jared Templeton
Institution
Pacific Northwest National Laboratory

Jeffry Stevenson
Institution
Pacific Northwest National Laboratory

Chris Coyle
Institution
Pacific Northwest National Laboratory