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Palladium versus Platinum: The Metal in the Catalytic Center of a Molecular Photocatalyst Determines the Mechanism of the Hydrogen Production with Visible Light
Abstract
To develop highly efficient molecular photocatalysts for visible light-driven hydrogen production, a thorough understanding of the photophysical and chemical processes in the photocatalyst is of vital importance. In this context, in situ X-ray absorption spectroscopic (XAS) investigations show that the nature of the catalytically active metal center in a (N^N)MCl2 (M=Pd or Pt) coordination sphere has a significant impact on the mechanism of the hydrogen formation. Pd as the catalytic center showed a substantially altered chemical environment and a formation of metal colloids during catalysis, whereas no changes of the coordination sphere were observed for Pt as catalytic center. The high stability of the Pt center was confirmed by chloride addition and mercury poisoning experiments. Thus, for Pt a fundamentally different catalytic mechanism without the involvement of colloids is confirmed.
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Authors (11)
-
M. Pfeffer
- Ulm University Institute of Inorganic Chemistry Materials and
-
Bernard Schaefer
- Karlsruher Institut fur Technologie Institut fur Nanotechnologie
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Grigory Smolentsev
- Lund University Department of Chemical Physics
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Jens Uhlig
- Lund University Department of Chemical Physics
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Elena Nazarenko
- Gothenburg University Department of Chemistry
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Christian Kuhnt
- University in Jena Institute of Physical Chemistry
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Maria Wachtler
- Leibnitz Institute of Photonic Technology .
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Benjamin Dietzek
- Leibnitz Institute of Photonic Technology .
-
Villy Sundstrom
- Lund University Department of Chemical Physics
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Sven Rau
- Ulm University Institute of Inorganic Chemistry Materials and
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
no. 54,
edition 17,
pages 5044 - 5048,
ISSN: 1433-7851 - Language:
- English
- Publication year:
- 2015
- Bibliographic description:
- Pfeffer M., Schaefer B., Smolentsev G., Uhlig J., Nazarenko E., Guthmuller J., Kuhnt C., Wachtler M., Dietzek B., Sundstrom V., Rau S.: Palladium versus Platinum: The Metal in the Catalytic Center of a Molecular Photocatalyst Determines the Mechanism of the Hydrogen Production with Visible Light// ANGEWANDTE CHEMIE-INTERNATIONAL EDITION. -Vol. 54, iss. 17 (2015), s.5044-5048
- DOI:
- Digital Object Identifier (open in new tab) 10.1002/anie.201581761
- Verified by:
- Gdańsk University of Technology
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