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O2-reduction at high temperature: MCFC

Electrocatalysis

The oxygen reduction/evolution reaction

  1. K. Hemmes1,
  2. J. R. Selman2

Published Online: 15 DEC 2010

DOI: 10.1002/9780470974001.f205044

Handbook of Fuel Cells

Handbook of Fuel Cells

How to Cite

Hemmes, K. and Selman, J. R. 2010. O2-reduction at high temperature: MCFC. Handbook of Fuel Cells. .

Author Information

  1. 1

    Delft University of Technology, Delft, The Netherlands

  2. 2

    Illinois Institute of Technology, Chicago, IL, USA

Publication History

  1. Published Online: 15 DEC 2010

Abstract

Oxygen reduction in molten carbonate is discussed in relation to the molten carbonate fuel cell. The melt chemistry of molten carbonate is found to be crucial in understanding the possible reaction mechanism and the dissolution problems of the cathode. Using concepts form linear algebra a complete set of equilibria describing the melt is constructed, which is used to derive the relative concentrations of species in the melt and possible reaction mechanisms. Experimental results are critically reviewed in the light of the theoretical predictions. Based on the obtained insight in the fundamental processes, research directions are indicated for minimizing cathode dissolution and cathode polarization, including a radical new concept of a MCFC with a separate CO2 channel.

Keywords:

  • oxygen reduction;
  • molten carbonate;
  • MCFC;
  • melt chemistry;
  • reaction mechanism;
  • carbon dioxide;
  • gas dissolution;
  • NiO dissolution;
  • MCFC with separate CO2 supply