The role of chemisorbed water in formation and stabilization of active sites on Pd/Alumina oxidation catalysts

Aleksey A. Vedyagin; Alexander M. Volodin; Roman M. Kenzhin; Vladimir O. Stoyanovskii; Vladimir A. Rogov; Vladimir V. Kriventsov; Ilya V. Mishakov

doi:10.1016/j.cattod.2017.01.033

The role of chemisorbed water in formation and stabilization of active sites on Pd/Alumina oxidation catalysts

Aleksey A. Vedyagin, Alexander M. Volodin, Roman M. Kenzhin, Vladimir O. Stoyanovskii, Vladimir A. Rogov, Vladimir V. Kriventsov, Ilya V. Mishakov

Physical Chemistry Section

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

A series of Pd/Al₂O₃ catalysts with different palladium loading was prepared by incipient wetness impregnation method. As it was shown by various physicochemical methods, palladium at concentrations not exceeding 0.5 wt.% favors to stabilize in an atomic dispersed ionic state. Appearance of PdO phase has been firmly detected by TPR, DR UV–vis and EXAFS starting from Pd concentration of 1 wt.%. It was found that low-content Pd/Al₂O₃ catalysts are characterized by high activity in CO oxidation due to atomically dispersed palladium species tailored to the donor sites of the support. The presence of chemisorbed water allows one to stabilize Pd in highly disperse state thus preventing the catalyst deactivation.

Original language	English
Pages (from-to)	102-110
Number of pages	9
Journal	Catalysis Today
Volume	307
DOIs	https://doi.org/10.1016/j.cattod.2017.01.033
Publication status	Published - 1 Jun 2018

Keywords

Alumina
Chemisorbed water
CO oxidation
Palladium catalysts
Stability
HYDROXYL-GROUPS
ELECTRON-DONOR
3-WAY CATALYSTS
SUPPORTED PALLADIUM
GAMMA-ALUMINA
CO OXIDATION
VENTILATION AIR METHANE
CARBON-MONOXIDE OXIDATION
PD/AL2O3 CATALYSTS
PALLADIUM-ALUMINA CATALYSTS

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10.1016/j.cattod.2017.01.033

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title = "The role of chemisorbed water in formation and stabilization of active sites on Pd/Alumina oxidation catalysts",

abstract = "A series of Pd/Al2O3 catalysts with different palladium loading was prepared by incipient wetness impregnation method. As it was shown by various physicochemical methods, palladium at concentrations not exceeding 0.5 wt.% favors to stabilize in an atomic dispersed ionic state. Appearance of PdO phase has been firmly detected by TPR, DR UV–vis and EXAFS starting from Pd concentration of 1 wt.%. It was found that low-content Pd/Al2O3 catalysts are characterized by high activity in CO oxidation due to atomically dispersed palladium species tailored to the donor sites of the support. The presence of chemisorbed water allows one to stabilize Pd in highly disperse state thus preventing the catalyst deactivation.",

keywords = "Alumina, Chemisorbed water, CO oxidation, Palladium catalysts, Stability, HYDROXYL-GROUPS, ELECTRON-DONOR, 3-WAY CATALYSTS, SUPPORTED PALLADIUM, GAMMA-ALUMINA, CO OXIDATION, VENTILATION AIR METHANE, CARBON-MONOXIDE OXIDATION, PD/AL2O3 CATALYSTS, PALLADIUM-ALUMINA CATALYSTS",

author = "Vedyagin, {Aleksey A.} and Volodin, {Alexander M.} and Kenzhin, {Roman M.} and Stoyanovskii, {Vladimir O.} and Rogov, {Vladimir A.} and Kriventsov, {Vladimir V.} and Mishakov, {Ilya V.}",

year = "2018",

month = jun,

day = "1",

doi = "10.1016/j.cattod.2017.01.033",

language = "English",

volume = "307",

pages = "102--110",

journal = "Catalysis Today",

issn = "0920-5861",

publisher = "Elsevier",

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The role of chemisorbed water in formation and stabilization of active sites on Pd/Alumina oxidation catalysts. / Vedyagin, Aleksey A.; Volodin, Alexander M.; Kenzhin, Roman M.; Stoyanovskii, Vladimir O.; Rogov, Vladimir A.; Kriventsov, Vladimir V.; Mishakov, Ilya V.

In: Catalysis Today, Vol. 307, 01.06.2018, p. 102-110.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - The role of chemisorbed water in formation and stabilization of active sites on Pd/Alumina oxidation catalysts

AU - Vedyagin, Aleksey A.

AU - Volodin, Alexander M.

AU - Kenzhin, Roman M.

AU - Stoyanovskii, Vladimir O.

AU - Rogov, Vladimir A.

AU - Kriventsov, Vladimir V.

AU - Mishakov, Ilya V.

PY - 2018/6/1

Y1 - 2018/6/1

N2 - A series of Pd/Al2O3 catalysts with different palladium loading was prepared by incipient wetness impregnation method. As it was shown by various physicochemical methods, palladium at concentrations not exceeding 0.5 wt.% favors to stabilize in an atomic dispersed ionic state. Appearance of PdO phase has been firmly detected by TPR, DR UV–vis and EXAFS starting from Pd concentration of 1 wt.%. It was found that low-content Pd/Al2O3 catalysts are characterized by high activity in CO oxidation due to atomically dispersed palladium species tailored to the donor sites of the support. The presence of chemisorbed water allows one to stabilize Pd in highly disperse state thus preventing the catalyst deactivation.

AB - A series of Pd/Al2O3 catalysts with different palladium loading was prepared by incipient wetness impregnation method. As it was shown by various physicochemical methods, palladium at concentrations not exceeding 0.5 wt.% favors to stabilize in an atomic dispersed ionic state. Appearance of PdO phase has been firmly detected by TPR, DR UV–vis and EXAFS starting from Pd concentration of 1 wt.%. It was found that low-content Pd/Al2O3 catalysts are characterized by high activity in CO oxidation due to atomically dispersed palladium species tailored to the donor sites of the support. The presence of chemisorbed water allows one to stabilize Pd in highly disperse state thus preventing the catalyst deactivation.

KW - Alumina

KW - Chemisorbed water

KW - CO oxidation

KW - Palladium catalysts

KW - Stability

KW - HYDROXYL-GROUPS

KW - ELECTRON-DONOR

KW - 3-WAY CATALYSTS

KW - SUPPORTED PALLADIUM

KW - GAMMA-ALUMINA

KW - CO OXIDATION

KW - VENTILATION AIR METHANE

KW - CARBON-MONOXIDE OXIDATION

KW - PD/AL2O3 CATALYSTS

KW - PALLADIUM-ALUMINA CATALYSTS

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DO - 10.1016/j.cattod.2017.01.033

M3 - Article

AN - SCOPUS:85009982280

VL - 307

SP - 102

EP - 110

JO - Catalysis Today

JF - Catalysis Today

SN - 0920-5861

ER -

The role of chemisorbed water in formation and stabilization of active sites on Pd/Alumina oxidation catalysts

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