TY - JOUR

T1 - Deep insight into CO adsorption on Ni-USY zeolite catalyst by FTIR spectroscopy. Evidence for isotopic isomerism

AU - Belykh, R.

AU - Maugé, F.

AU - Tsyganenko, A.

PY - 2019/8/5

Y1 - 2019/8/5

N2 - FTIR spectra of CO adsorbed on reduced Ni-containing USY zeolites with Si/Al = 30 besides weak H-bond with bridged hydroxyls and silanol groups and bonding to Ni2+ cations reveal formation of mono-, di- and tricarbonyls with Ni+ sites. The bands of adsorbed CO species are very narrow, with FWMH˜1–1.5 cm−1. The spectra of isotopically mixed nickel dicarbonyl species reveal the splitting, which shows that two CO molecules occupy non-equivalent positions, so that the species exist in two isomeric forms, despite the similarity of sites, following from the spectra of monocarbonyls. Possible explanations of this phenomenon are discussed.

AB - FTIR spectra of CO adsorbed on reduced Ni-containing USY zeolites with Si/Al = 30 besides weak H-bond with bridged hydroxyls and silanol groups and bonding to Ni2+ cations reveal formation of mono-, di- and tricarbonyls with Ni+ sites. The bands of adsorbed CO species are very narrow, with FWMH˜1–1.5 cm−1. The spectra of isotopically mixed nickel dicarbonyl species reveal the splitting, which shows that two CO molecules occupy non-equivalent positions, so that the species exist in two isomeric forms, despite the similarity of sites, following from the spectra of monocarbonyls. Possible explanations of this phenomenon are discussed.

KW - Adsorption

KW - Carbon monoxide

KW - FTIR spectroscopy

KW - Nickel

KW - Zeolite

UR - http://www.scopus.com/inward/record.url?scp=85068522945&partnerID=8YFLogxK

U2 - 10.1016/j.apcata.2019.117140

DO - 10.1016/j.apcata.2019.117140

M3 - Article

AN - SCOPUS:85068522945

VL - 583

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

SN - 0926-860X

M1 - 117140

ER -