Chemisorption at 360 °C of hydrogen labeled with tritium has been studied on unsupported platinum black catalysts, thus avoiding complications from spillover. Catalysts in a microcatalytic reactor were exposed to pulses or to static treatment with H2 HT. After helium flow over these catalysts tritium could be detected by radiochromatography in subsequent pulses of ethylene, cyclohexene and n-hex-1-ene, or H2 which passed over the catalysts. From the time-dependence of the phenomena and other evidence, it was deduced that H2 HT in the catalysts was present in positions in the matrix which were accessible or inaccessible to hydrocarbons and hydrogen. Scintillation counting was used to confirm the retention and possible absorption of tritium by the catalysts.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry