Propene oxidation and hydrogenation on a porous platinum electrode in acidic solution
Authors:
- Maria Bełtowska-Brzezinska,
- Teresa Renata Łuczak,
- Helmut Baltruschat,
- Ulrich Müller
Abstract
The electrochemical reactivity of propene at the polycrystalline Pt/acidic solution interface was studied by on line differential electrochemical mass spectrometry (DEMS). It was shown that a relatively fast adsorption of hydrocarbon molecules on the electrode surface preceded their electroreduction and electrooxidation at E < 0.2 V and E > 0.6 V, respectively. The adsorbate consisted of associatively bonded propene, partially dehydrogenated C3-hydrocarbon residues, as well as C3-, C2- and/or C1-oxygen-containing species in relative amounts dependent on the adsorption potential and the subsequent potential sequence. The maximum electrode coverage of 0.58 nmol cm-2 was achieved in the potential range 0.3-0.5 V, where the major part of the surface species was propene itself, oriented with the carbon chain almost parallel relative to the electrode/solution interface. The oxygenated C3-species were formed favorably in the presence of coadsorbed water and/or OH species, at 0.5 V < E < 0.8 V. Propane was identified as the main volatile product of the cathodic hydrogenation of the adsorbate. Additionally, the reductive decomposition of the oxygenated C3-species yielded methane along with the C2-oxygen-containing moieties remaining on the Pt surface and/or undergoing further fragmentation to the C1-oxygen-containing residues. The only final volatile oxidation product of all the adsorbates was CO2.
- Record ID
- UAMc2f8cd6b663047e6bfae3637e59d52e6
- Author
- Journal series
- Journal of Physical Chemistry B, ISSN 1520-6106
- Issue year
- 2003
- Vol
- 107
- Pages
- 4793-4800
- ASJC Classification
- ; ;
- Language
- (en) English
- Score (nominal)
- 0
- Score source
- journalList
- Publication indicators
- = 17; = 20; : 2003 = 1.491; : 2006 (2 years) = 4.115 - 2007 (5 years) =4.475
- Uniform Resource Identifier
- https://researchportal.amu.edu.pl/info/article/UAMc2f8cd6b663047e6bfae3637e59d52e6/
- URN
urn:amu-prod:UAMc2f8cd6b663047e6bfae3637e59d52e6
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