Hydrogen content and graphitization of carbonaceous deposits on noble metals and alloys studied with secondary ion mass spectrometry

J.W. Niemantsverdriet, Dick van Langeveld

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Abstract

Carbonaceous deposits formed from ethylene at 325, 525 and 775 K on Pt, Ir, Rh, PtRh and PtIr have been investigated with SIMS and AES. Negative SIMS spectra are very sensitive for the state of the deposit. It is argued that the intense negative hydrocarbon ions in SIMS are formed by reactions between ions and neutral species. Carbonaceous deposits formed between 500 and 800 K are relatively hydrogen—rich on Ir, graphitic on Pt and depleted in hydrogen on Rh. Alloying of Pt with Ir increases the hydrogen content and decreases the graphitization of the carbon, alloying of Pt with Rh has less effect.
Original languageEnglish
Title of host publicationCatalysis 1987 : Proceedings of the 10th North American Meeting of the Catalysis Society San Diego, CA
EditorsJ.W. Ward
Place of PublicationAmsterdam
PublisherElsevier
Pages769-781
ISBN (Print)0-444-42955-7
DOIs
Publication statusPublished - 1988
Event10th North American Catalysis Society Meeting (NAM10), May 17-22, 1987, San Diego, CA, USA - San Diego, CA, United States
Duration: 17 May 198722 May 1987

Publication series

NameStudies in Surface Science and Catalysis
Volume38
ISSN (Print)0167-2991

Conference

Conference10th North American Catalysis Society Meeting (NAM10), May 17-22, 1987, San Diego, CA, USA
Abbreviated titleNAM10
CountryUnited States
CitySan Diego, CA
Period17/05/8722/05/87

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Niemantsverdriet, J. W., & van Langeveld, D. (1988). Hydrogen content and graphitization of carbonaceous deposits on noble metals and alloys studied with secondary ion mass spectrometry. In J. W. Ward (Ed.), Catalysis 1987 : Proceedings of the 10th North American Meeting of the Catalysis Society San Diego, CA (pp. 769-781). (Studies in Surface Science and Catalysis; Vol. 38). Amsterdam: Elsevier. https://doi.org/10.1016/S0167-2991(09)60705-9