Research output: Contribution to journal › Article › peer-review
Effect of metal-metal and metal-support interaction on activity and stability of Pd-Rh/alumina in CO oxidation. / Vedyagin, Aleksey A.; Volodin, Alexander M.; Kenzhin, Roman M. et al.
In: Catalysis Today, Vol. 293-294, 15.09.2017, p. 73-81.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Effect of metal-metal and metal-support interaction on activity and stability of Pd-Rh/alumina in CO oxidation
AU - Vedyagin, Aleksey A.
AU - Volodin, Alexander M.
AU - Kenzhin, Roman M.
AU - Stoyanovskii, Vladimir O.
AU - Shubin, Yury V.
AU - Plyusnin, Pavel E.
AU - Mishakov, Ilya V.
PY - 2017/9/15
Y1 - 2017/9/15
N2 - A series of Pd-Rh/alumina catalysts with total precious metals loading of 0.2 wt.% was prepared by means of mechanical mixing of monometallic precursors and incipient wetness impregnation of the support with dual complex salt. Gamma and delta alumina supports were obtained from commercial aluminum hydroxide by calcinations at 720 and 1000 °C respectively. Supports were examined by electron paramagnetic resonance spectroscopy, low-temperature nitrogen adsorption, X-ray diffraction analysis and photoluminescence spectroscopy. It was shown that concentration of donor sites of the supports differs according to distinctions between values of their specific surface areas. Finally, the strength of metal-support interaction is getting much weaker in the case of δ-Al2O3. Bimetallic Pd-Rh species with strong metal-metal interaction supported on γ-Al2O3 were found to be characterized by superior high-temperature stability. Pd/Rh ratios of 3:2 and 7:3 were shown to be the most appropriate for this purpose.
AB - A series of Pd-Rh/alumina catalysts with total precious metals loading of 0.2 wt.% was prepared by means of mechanical mixing of monometallic precursors and incipient wetness impregnation of the support with dual complex salt. Gamma and delta alumina supports were obtained from commercial aluminum hydroxide by calcinations at 720 and 1000 °C respectively. Supports were examined by electron paramagnetic resonance spectroscopy, low-temperature nitrogen adsorption, X-ray diffraction analysis and photoluminescence spectroscopy. It was shown that concentration of donor sites of the supports differs according to distinctions between values of their specific surface areas. Finally, the strength of metal-support interaction is getting much weaker in the case of δ-Al2O3. Bimetallic Pd-Rh species with strong metal-metal interaction supported on γ-Al2O3 were found to be characterized by superior high-temperature stability. Pd/Rh ratios of 3:2 and 7:3 were shown to be the most appropriate for this purpose.
KW - Alumina
KW - Bimetallic Pd-Rh catalysts
KW - CO oxidation
KW - Phase transformation
KW - Stability
KW - PALLADIUM
KW - CONVERSION
KW - 3-WAY CATALYSTS
KW - PERFORMANCE
KW - DISPERSION
KW - MODEL
KW - ALUMINA
KW - SURFACE
KW - PD/AL2O3 CATALYSTS
KW - GAMMA-AL2O3
UR - http://www.scopus.com/inward/record.url?scp=85001698826&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2016.10.010
DO - 10.1016/j.cattod.2016.10.010
M3 - Article
AN - SCOPUS:85001698826
VL - 293-294
SP - 73
EP - 81
JO - Catalysis Today
JF - Catalysis Today
SN - 0920-5861
ER -
ID: 10318353