Infra-red determination of the isotherm of hydrogen adsorption on a Pt/Al2O3 catalyst

Michel Primet, Jean-Marie Maurice Basset, Michel Vital Mathieu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


Of the various forms of hydrogen adsorbed on platinum only hydrogen weakly and reversibly adsorbed is detected by an infra-red band at 2120 cm -1. The preparation of a well dispersed sample of Pt/Al 2O3 catalyst containing 10% platinum allows us to determine accurately the hydrogen adsorption isotherm of this weakly adsorbed species. Only a dissociative Langmuir model fits the experimental results in the pressure range of 10-1 to 700 Torr and temperature range of 27 to 95°C. The heat of adsorption (-5 × 104 J mol-1) and the isosteric heat of adsorption are in good agreement with previous calorimetric data.

Original languageEnglish (US)
Pages (from-to)293-298
Number of pages6
JournalJournal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
StatePublished - Dec 1 1974

ASJC Scopus subject areas

  • Chemistry(all)


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