BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:In situ determination of the active phase in palladium nanocatalys
 t by X-ray absorption spectroscopy and X-ray diffraction
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20260610T155836Z
UID:indico-contribution-1294@indico.inp.nsk.su
DESCRIPTION:Speakers: Aram Bugaev (Southern Federal University)\nHydrogena
 tion of alkynes and alkenes over palladium catalyst is associated with for
 mation of palladium hydrides and carbides phases\, which affects the selec
 tivity and catalytic performance of the catalyst. The aim of this study is
  to investigate the effect of the structural changes on the catalytic prop
 erties of the material. We investigated the structural evolution of the in
 dustrial palladium-based nanocatalyst in operando conditions during the ca
 talytic hydrogenation of ethylene. The structure of the catalyst was follo
 wed by X-ray absorption spectroscopy and X-ray powder diffraction\, while 
 the conversion level of ethylene to ethane was controlled by mass spectrom
 eter. We observed that phase transitions occurring in palladium nanopartic
 les lead to dramatic changes of the catalytic activity. In addition to sta
 ndard Fourier-analysis of X-ray absorption data and Rietveld refinement of
  diffraction patterns\, analysis of X-ray absorption near-edge structure (
 XANES) allowed to discriminate between PdH and PdC species having similar 
 fcc structure. The PdC phase and pure Pd phase demonstrated extremely high
  catalytic activity in ethylene to ethane hydrogenation\, while β-PdH sho
 wed unexpectedly low activity.\n\nhttps://indico.inp.nsk.su/event/3/contri
 butions/1294/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1294/
END:VEVENT
END:VCALENDAR