Fe local structure in Pt-free nitrogen-modified carbon based electrocatalysts: XAFS study

Agnieszka Witkowska; Gabriele Giuli; Marco Renzi; Francesco Nobili; Mariangela Longhi

doi:10.1088/1742-6596/712/1/012131

Fe local structure in Pt-free nitrogen-modified carbon based electrocatalysts: XAFS study

Abstract

The paper presents a new results on the bonding environment (coordination number and geometry) and on oxidation states of Fe in nitrogen-modified Fe/C composites used as Pt-free catalysts for oxygen reduction in Direct Hydrogen Fuel Cells. Starting from glucose or fructose, two catalysts displaying different electrochemical performance were prepared and studied in the form of pristine powder and thin catalytic layer of electrode by Fe K-edge XAFS spectroscopy. The results show how the Fe local structure varies as a function of different synthesis conditions and how changes in the structural properties of the catalysts are related to fuel cell electrochemical performance increase during a cell activation period.

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Authors (5)

Agnieszka Witkowska dr hab. inż.
Gabriele Giuli dr
- University of Camerino Geology Division
Marco Renzi mgr
- University of Camerino Chemistry Division
Francesco Nobili dr
- University of Camerino Chemistry Division
Mariangela Longhi dr
- University of Milano Chemistry Department

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DOI:: Digital Object Identifier (open in new tab) 10.1088/1742-6596/712/1/012131
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Details

Category:: Articles
Type:: publikacja w in. zagranicznym czasopiśmie naukowym (tylko język obcy)
Published in:: Journal of Physics : Conference Series no. 712, pages 1 - 4,
ISSN: 1742-6588
Language:: English
Publication year:: 2016
Bibliographic description:: Witkowska A., Giuli G., Renzi M., Nobili F., Longhi M.. Fe local structure in Pt-free nitrogen-modified carbon based electrocatalysts: XAFS study. Journal of Physics : Conference Series, 2016, Vol. 712, nr. 1, s.1-4
DOI:: Digital Object Identifier (open in new tab) 10.1088/1742-6596/712/1/012131
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