Measuring individual overpotentials in an operating solid-oxide electrochemical cell.

  title={Measuring individual overpotentials in an operating solid-oxide electrochemical cell.},
  author={Farid El Gabaly and Michael E. Grass and Anthony H. McDaniel and Roger L. Farrow and Mark A Linne and Zahid I. Hussain and Hendrik Bluhm and Zhi Liu and Kevin F. McCarty},
  journal={Physical chemistry chemical physics : PCCP},
  volume={12 38},
We use photo-electrons as a non-contact probe to measure local electrical potentials in a solid-oxide electrochemical cell. We characterize the cell in operando at near-ambient pressure using spatially-resolved X-ray photoemission spectroscopy. The overpotentials at the interfaces between the Ni and Pt electrodes and the yttria-stabilized zirconia (YSZ) electrolyte are directly measured. The method is validated using electrochemical impedance spectroscopy. Using the overpotentials, which… CONTINUE READING

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