Dynamics of Sintering of Platinum Black: An X-Ray Diffraction Study

I. Manninger, Z. Paál, P. Tétényi

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Sintering of platinum black in hydrogen (crystallite size and lattice strain) has been monitored by in situ X-ray diffractometry. The process was finished within 20-50 min after the temperature jump from 300 to 470…670Kwas completed, its initial rate depending on the final temperature. The effect ot hydrogen exposure was also studied. Sintering was attributed to diffusion of hydrogen into subsurface layers. A hydrogen-rich surface layer consisting mainly of interstitial hydrogen being most stable at around 570 K facilitated this process. Lattice strain relaxation may be due to the removal of subsurface oxygen.

Original languageEnglish
Pages (from-to)193-200
Number of pages8
JournalZeitschrift fur Physikalische Chemie
Volume132
Issue number2
DOIs
Publication statusPublished - Jan 1 1982

Keywords

  • Catalyst sintering
  • Pt-black
  • X-ray diffraction

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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