@article{NeidhardtBessler2019,
  author    = {Jonathan Philipp Neidhardt and Wolfgang G. Bessler},
  title     = {Microkinetic Modeling of Nickel Oxidation in Solid Oxide Cells: Prediction of Safe Operating Conditions},
  series   = {Chemie Ingenieur Technik},
  volume    = {91},
  number    = {6},
  publisher = {Wiley Online Library},
  issn      = {1522-2640 E-ISSN},
  doi       = {10.1002/cite.201800197},
  pages     = {843 -- 855},
  year      = {2019},
  abstract  = {Oxidation of the nickel electrode is a severe aging mechanism of solid oxide fuel cells (SOFC) and solid oxide electrolyzer cells (SOEC). This work presents a modeling study of safe operating conditions with respect to nickel oxide formation. Microkinetic reaction mechanisms for thermochemical and electrochemical nickel oxidation are integrated into a 2D multiphase model of an anode‐supported solid oxide cell. Local oxidation propensity can be separated into four regimes. Simulations show that the thermochemical pathway generally dominates the electrochemical pathway. As a consequence, as long as fuel utilization is low, cell operation considerably below electrochemical oxidation limit of 0.704 V is possible without the risk of reoxidation.},
  language  = {en}
}