Oxygen binding to cobalt and iron phthalocyanines as determined from in situ X-ray absorption spectroscopy

Piter S. Miedema; Matti M. Van Schooneveld; René Bogerd; Tulio C.R. Rocha; Michael Hävecker; Axel Knop-Gericke; Frank M.F. De Groot

doi:10.1021/jp209295f

Oxygen binding to cobalt and iron phthalocyanines as determined from in situ X-ray absorption spectroscopy

Piter S. Miedema, Matti M. Van Schooneveld, René Bogerd, Tulio C.R. Rocha, Michael Hävecker, Axel Knop-Gericke, Frank M.F. De Groot^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Cobalt phthalocyanine (CoPc) and iron phthalocyanine (FePc) are possible oxygen reduction catalysts in fuel cells, but the exact functioning and deactivation of these catalysts is unknown. The electronic structure of the CoPc and FePc has been studied in situ under hydrogen and oxygen atmospheres by a combination of ambient-pressure X-ray photoelectron spectroscopy and X-ray absorption spectroscopy. The results show that when oxygen is introduced, the iron changes oxidation state while the cobalt does not. The data show that oxygen binds in an end-on configuration in CoPc, while for FePc side-on binding is most likely.

Original language	English
Pages (from-to)	25422-25428
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	115
Issue number	51
DOIs	https://doi.org/10.1021/jp209295f
Publication status	Published - 29 Dec 2011

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title = "Oxygen binding to cobalt and iron phthalocyanines as determined from in situ X-ray absorption spectroscopy",

abstract = "Cobalt phthalocyanine (CoPc) and iron phthalocyanine (FePc) are possible oxygen reduction catalysts in fuel cells, but the exact functioning and deactivation of these catalysts is unknown. The electronic structure of the CoPc and FePc has been studied in situ under hydrogen and oxygen atmospheres by a combination of ambient-pressure X-ray photoelectron spectroscopy and X-ray absorption spectroscopy. The results show that when oxygen is introduced, the iron changes oxidation state while the cobalt does not. The data show that oxygen binds in an end-on configuration in CoPc, while for FePc side-on binding is most likely.",

author = "Miedema, {Piter S.} and {Van Schooneveld}, {Matti M.} and Ren{\'e} Bogerd and Rocha, {Tulio C.R.} and Michael H{\"a}vecker and Axel Knop-Gericke and {De Groot}, {Frank M.F.}",

year = "2011",

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day = "29",

doi = "10.1021/jp209295f",

language = "English",

volume = "115",

pages = "25422--25428",

journal = "Journal of Physical Chemistry C",

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TY - JOUR

T1 - Oxygen binding to cobalt and iron phthalocyanines as determined from in situ X-ray absorption spectroscopy

AU - Miedema, Piter S.

AU - Van Schooneveld, Matti M.

AU - Bogerd, René

AU - Rocha, Tulio C.R.

AU - Hävecker, Michael

AU - Knop-Gericke, Axel

AU - De Groot, Frank M.F.

PY - 2011/12/29

Y1 - 2011/12/29

N2 - Cobalt phthalocyanine (CoPc) and iron phthalocyanine (FePc) are possible oxygen reduction catalysts in fuel cells, but the exact functioning and deactivation of these catalysts is unknown. The electronic structure of the CoPc and FePc has been studied in situ under hydrogen and oxygen atmospheres by a combination of ambient-pressure X-ray photoelectron spectroscopy and X-ray absorption spectroscopy. The results show that when oxygen is introduced, the iron changes oxidation state while the cobalt does not. The data show that oxygen binds in an end-on configuration in CoPc, while for FePc side-on binding is most likely.

AB - Cobalt phthalocyanine (CoPc) and iron phthalocyanine (FePc) are possible oxygen reduction catalysts in fuel cells, but the exact functioning and deactivation of these catalysts is unknown. The electronic structure of the CoPc and FePc has been studied in situ under hydrogen and oxygen atmospheres by a combination of ambient-pressure X-ray photoelectron spectroscopy and X-ray absorption spectroscopy. The results show that when oxygen is introduced, the iron changes oxidation state while the cobalt does not. The data show that oxygen binds in an end-on configuration in CoPc, while for FePc side-on binding is most likely.

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U2 - 10.1021/jp209295f

DO - 10.1021/jp209295f

M3 - Article

AN - SCOPUS:84255173350

SN - 1932-7447

VL - 115

SP - 25422

EP - 25428

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 51

ER -

Oxygen binding to cobalt and iron phthalocyanines as determined from in situ X-ray absorption spectroscopy

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