Cobalt tetramethoxyphenyl porphyrin-emission Mossbauer spectroscopy and O2 reduction electrochemical studies

Daniel Alberto Scherson, S. L. Gupta, C. Fierro, E. B. Yeager, M. E. Kordesch, J. Eldridge, R. W. Hoffman, J. Blue

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Abstract

Cobalt tetramethoxyphenyl porphyrin (Co-TMPP) on a high area carbon support after thermal treatment at 450-900°C has been found to be an effective catalyst for O2 reduction in alkaline electrolytes. The effect of the heat treatment at 850°C on this catalyst has been examine with emission Mössbauer spectroscopy using Co-57 enriched Co-TMPP. The spectra indicate the presence of cobaltous oxides with no evidence of Co-N4 centers or any other form of cobalt. The metal-free complex H2TMPP, given similar thermal treatment on a mineral-free carbon support does not show catalytic activity beyond that of the carbon support, thus confirming the importance of the transition metal to the catalysis.

Original languageEnglish
Pages (from-to)1205-1209
Number of pages5
JournalElectrochimica Acta
Volume28
Issue number9
DOIs
Publication statusPublished - 1983 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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    Scherson, D. A., Gupta, S. L., Fierro, C., Yeager, E. B., Kordesch, M. E., Eldridge, J., Hoffman, R. W., & Blue, J. (1983). Cobalt tetramethoxyphenyl porphyrin-emission Mossbauer spectroscopy and O2 reduction electrochemical studies. Electrochimica Acta, 28(9), 1205-1209. https://doi.org/10.1016/0013-4686(83)85006-3