The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
Catalysts for the Oxygen Reduction from Heat-Treated Iron(III) Tetramethoxyphenylporphyrin Chloride: Structure and Stability of Active Sites
Abstract
Structure and stability of an iron-based catalyst for the oxygen reduction reaction, prepared by heat treatment of carbon-supported iron(III) tetramethoxyphenylporphyrin chloride (FeTMPP−Cl), were investigated. The oxygen reduction in acid electrolyte was examined with the rotating (ring) disk electrode. The measurements confirmed that H 2 O 2 is generated as a byproduct of the oxygen reduction. The structural elucidation of the catalyst showed that the porphyrin decomposes during heat treatment. Nitrogen atoms of the heat-treated porphyrin become bonded at the edge of graphene layers as pyridine- and pyrrole-type nitrogen. Two Fe 3+ components as well as metallic, carbidic and oxidic iron were detected by Mössbauer spectroscopy. An electrochemical longevity test and two degradation experiments with sulfuric acid and H 2 O 2 showed that H 2 O 2 causes the degradation of active sites. A 6-fold coordinated Fe 3+ compound seems to be responsible for the catalytic activity. Only 8% of the primary iron content is present in the active iron component.
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Citations
Cites
Evolution of nitrogen functionalities in carbonaceous materials during pyrolysis
Pels, J. R., Kapteijn, F., Moulijn, J. A., Zhu, Q., & Thomas, K. M. (1995) · Carbon · doi:10.1016/0008-6223(95)00154-6 · Cited by 2,041
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Recent advancements in Pt and Pt-free catalysts for oxygen reduction reaction
Nie, Y., Li, L., & Wei, Z. (2015) · Chemical Society Reviews · doi:10.1039/c4cs00484a · Cited by 2,156
Recent advances in catalysts for direct methanol fuel cells
Zhao, X., Yin, M., Ma, L., Liang, L., Liu, C., Liao, J., Lu, T., & Xing, W. (2011) · Energy & Environmental Science · doi:10.1039/c1ee01307f · Cited by 939
Fernández, J. L., Walsh, D. A., & Bard, A. J. (2005) · Journal of the American Chemical Society · doi:10.1021/ja0449729 · Cited by 623
PGM‐Free Cathode Catalysts for PEM Fuel Cells: A Mini‐Review on Stability Challenges
Shao, Y., Dodelet, J., Wu, G., & Zelenay, P. (2019) · Advanced Materials · doi:10.1002/adma.201807615 · Cited by 553
Stability of Fe‐N‐C Catalysts in Acidic Medium Studied by Operando Spectroscopy
Choi, C. H., Baldizzone, C., Grote, J., Schuppert, A. K., Jaouen, F., & Mayrhofer, K. J. J. (2015) · Angewandte Chemie International Edition · doi:10.1002/anie.201504903 · Cited by 438
Metadata
- Authors
- Schulenburg, H., Stankov, S., Schünemann, V., Radnik, J., Dorbandt, I., Fiechter, S., Bogdanoff, P., & Tributsch, H.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2003-07-19
- Volume
- 107
- Issue
- 34
- Pages
- 9034-9041
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2049249422
- Cited by
- 341
- References
- 1
- FWCI
- 5.34
- Type
- journal article
- Language
- en
- Open access
- closed
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