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SUMMARY:Structural study of bimetallic catalytic nanosystems containing pr
 ecious metals by XAFS spectroscopy
DTSTART;VALUE=DATE-TIME:20200713T142200Z
DTEND;VALUE=DATE-TIME:20200713T142300Z
DTSTAMP;VALUE=DATE-TIME:20260608T045124Z
UID:indico-contribution-1900@indico.inp.nsk.su
DESCRIPTION:Speakers: Vladimir Kriventsov ()\nThis work presents the resul
 ts of a study of the local structure of the active component of mono-\, bi
 -metallic low-percentage (~1%) catalysts (containing Pt\, Au\, Pd\, Ru) st
 abilized on oxide carriers using XAFS method (XANES/EXAFS). Studying the n
 ature of nano-forms of noble metal stabilization is promising for creating
  effective catalysts for various applications\, including catalytic system
 s for alternative energy applications. The development of synthesis method
 s can lead to a significant economic gain\, due to the reduction of the me
 tal content and optimization of the catalytic properties of the system. Mo
 del catalysts were prepared from mono-and bimetallic complexes\, with vary
 ing synthesis methods: sol-gel\, ion exchange\, impregnation\, reducing mo
 des\, and the nature of carriers. XAFS (XANES/EXAFS) spectra (Pt-L3\, Au-L
 3\, Pd-K\, Ru-K) of studied samples were recorded at SSTRC\, Novosibirsk. 
 Genesis of the local structure of the active component was studied\, inclu
 ding the study of oxidized precursors and catalysts after reducing and act
 ivation. It is established that depending on the background\, it is possib
 le to form various nanoscale forms of noble metals localized on the surfac
 e of the oxide carrier. Additionally\, the samples were studied by XRD\, X
 PS\, XRFA\, HRTEM. Variants of possible structural models are considered i
 n detail.\nThe work was carried out in the framework of the RFBR projects 
 no. 19-05-50046\, 18-03-01251. The work was done at the shared research ce
 nter SSTRC on the basis of the Novosibirsk FEL/VEPP-4-VEPP-2000 complex at
  BINP SB RAS\, using equipment supported by project RFMEFI62119X0022.\n\nh
 ttps://indico.inp.nsk.su/event/24/contributions/1900/
LOCATION:
URL:https://indico.inp.nsk.su/event/24/contributions/1900/
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