Reversible formation of a PdCx phase in Pd nanoparticles upon CO and O-2 exposure
(2012) In Physical Chemistry Chemical Physics 14(14). p.4796-4801- Abstract
- The structure and chemical composition of Pd nanoparticles exposed to pure CO and mixtures of CO and O-2 at elevated temperatures have been studied in situ by a combination of X-ray Diffraction and X-ray Photoelectron Spectroscopy in pressures ranging from ultra high vacuum to 10 mbar and from room temperature to a few hundred degrees celsius. Our investigation shows that under CO exposure, above a certain temperature, carbon dissolves into the Pd particles forming a carbide phase. Upon exposure to CO and O-2 mixtures, the carbide phase forms and disappears reversibly, switching at the stoichiometric ratio for CO oxidation. This finding opens new scenarios for the understanding of catalytic oxidation of C-based molecules.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2594698
- author
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Chemistry Chemical Physics
- volume
- 14
- issue
- 14
- pages
- 4796 - 4801
- publisher
- Royal Society of Chemistry
- external identifiers
-
- wos:000301494400015
- scopus:84858626058
- pmid:22361687
- ISSN
- 1463-9084
- DOI
- 10.1039/c2cp22873d
- language
- English
- LU publication?
- yes
- id
- ce3baf11-8808-4094-abab-fc5faca86e21 (old id 2594698)
- date added to LUP
- 2016-04-01 13:59:09
- date last changed
- 2023-11-13 00:48:07
@article{ce3baf11-8808-4094-abab-fc5faca86e21, abstract = {{The structure and chemical composition of Pd nanoparticles exposed to pure CO and mixtures of CO and O-2 at elevated temperatures have been studied in situ by a combination of X-ray Diffraction and X-ray Photoelectron Spectroscopy in pressures ranging from ultra high vacuum to 10 mbar and from room temperature to a few hundred degrees celsius. Our investigation shows that under CO exposure, above a certain temperature, carbon dissolves into the Pd particles forming a carbide phase. Upon exposure to CO and O-2 mixtures, the carbide phase forms and disappears reversibly, switching at the stoichiometric ratio for CO oxidation. This finding opens new scenarios for the understanding of catalytic oxidation of C-based molecules.}}, author = {{Balmes, Olivier and Resta, Andrea and Wermeille, Didier and Felici, Roberto and Messing, Maria and Deppert, Knut and Liu, Zhi and Grass, Michael E. and Bluhm, Hendrik and van Rijn, Richard and Frenken, Joost W. M. and Westerstroem, Rasmus and Blomberg, Sara and Gustafson, Johan and Andersen, Jesper N and Lundgren, Edvin}}, issn = {{1463-9084}}, language = {{eng}}, number = {{14}}, pages = {{4796--4801}}, publisher = {{Royal Society of Chemistry}}, series = {{Physical Chemistry Chemical Physics}}, title = {{Reversible formation of a PdCx phase in Pd nanoparticles upon CO and O-2 exposure}}, url = {{http://dx.doi.org/10.1039/c2cp22873d}}, doi = {{10.1039/c2cp22873d}}, volume = {{14}}, year = {{2012}}, }