NDLI: DRIFT Studies of Adsorbed CO Over Sulfided K–Rh–Mo/Al2O3 Catalysts: Detection of Rh–Mo

Content Provider	Springer Nature Link
Author	Eswaramoorthi, I. Dalai, Ajay K.
Copyright Year	2009
Abstract	Diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy was used to study the nature of active species in K–Rh–Co–MoS2/Al2O3 catalyst by means of probing with CO molecule. The effects of K addition to Rh and interaction between Mo and Rh were studied with varying K and Mo loadings over 1 wt% Rh/Al2O3 catalyst. In sulfided Rh–Mo/Al2O3, the formation of Rh–Mo–S phase was evidenced first time by a band at 2,095 cm−1. The introduction of Co to K–Rh–MoS2/Al2O3 catalyst showed the existence of both Rh and Co promoted MoS2 sites, but the CO absorption frequencies in DRIFT spectra are significantly at lower side compared to Co free Rh–Mo catalyst. The stabilities of CO band from Rh and Co promoted and unpromoted MoS2 sites are studied at different temperatures. When activated carbon used as support, bands for both promoted and unpromoted MoS2 sites were appeared, but the intensity of these bands were decreased largely compared to alumina based catalyst, resulted from the coverage of added K not only on the support surface but also on the active metal components due to the neutral nature of activated carbon.
Starting Page	203
Ending Page	212
Page Count	10
File Format	PDF
ISSN	1011372X
Journal	Catalysis Letters
Volume Number	131
Issue Number	1-2
e-ISSN	1572879X
Language	English
Publisher	Springer US
Publisher Date	2009-06-11
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Rh–Mo–S phase Rh–Mo interaction K–Rh interaction Modified MoS2 catalyst CO adsorption Pharmacy Industrial Chemistry/Chemical Engineering Physical Chemistry Catalysis
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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