Silver and manganese oxide catalysts supported on mesoporous ZrO2 nanofiber mats for catalytic removal of benzene and diesel soot

Chanmin Lee; Yong Gun Shul; Hisahiro Einaga

doi:10.1016/j.cattod.2016.05.050

Silver and manganese oxide catalysts supported on mesoporous ZrO₂ nanofiber mats for catalytic removal of benzene and diesel soot

Chanmin Lee, Yong Gun Shul, Hisahiro Einaga

Department of Chemical and Biomolecular Engineering

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

39 Citations (Scopus)

Abstract

Mesoporous zirconia (ZrO₂) nanofibers were synthesized by an electrospinning method and calcination at 600 °C. Ag and Mn oxides were separately or simultaneously deposited on the ZrO₂ nanofibers by impregnation methods. The structure of the ZrO₂ supported nanofiber materials were examined by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). Ag and Mn oxides were homogeneously deposited on the surface of ZrO₂ nanofibers. Metallic Ag species and Mn₂O₃ were formed on the ZrO₂ nanofibers when they were separately deposited, whereas the codeposition of Ag and Mn changed the oxidation state of Mn oxides on the catalyst surface. The supported catalysts were evaluated for their soot and benzene oxidation performance. The co-deposition of Ag and Mn lowered the light-off temperature for benzene oxidation. The soot oxidation performance was comparable for the Ag/ZrO₂, Mn/ZrO₂ and Ag-Mn/ZrO₂ catalysts under tight contact mode, whereas Ag/ZrO₂ exhibited the highest activity and the activity decreased with decreasing the Ag content under loose contact mode.

Original language	English
Pages (from-to)	460-466
Number of pages	7
Journal	Catalysis Today
Volume	281
DOIs	https://doi.org/10.1016/j.cattod.2016.05.050
Publication status	Published - 2017 Mar 1

Bibliographical note

Funding Information:
This work was supported by the Industrial Technology Innovation Program funded by the Ministry of Trade, Industry and Energy (MOTIE) , Republic of Korea (grant number 10052076 ).

Publisher Copyright:
© 2016 Elsevier B.V.

All Science Journal Classification (ASJC) codes

Catalysis
Chemistry(all)

Access to Document

10.1016/j.cattod.2016.05.050

Cite this

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title = "Silver and manganese oxide catalysts supported on mesoporous ZrO2 nanofiber mats for catalytic removal of benzene and diesel soot",

abstract = "Mesoporous zirconia (ZrO2) nanofibers were synthesized by an electrospinning method and calcination at 600 °C. Ag and Mn oxides were separately or simultaneously deposited on the ZrO2 nanofibers by impregnation methods. The structure of the ZrO2 supported nanofiber materials were examined by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). Ag and Mn oxides were homogeneously deposited on the surface of ZrO2 nanofibers. Metallic Ag species and Mn2O3 were formed on the ZrO2 nanofibers when they were separately deposited, whereas the codeposition of Ag and Mn changed the oxidation state of Mn oxides on the catalyst surface. The supported catalysts were evaluated for their soot and benzene oxidation performance. The co-deposition of Ag and Mn lowered the light-off temperature for benzene oxidation. The soot oxidation performance was comparable for the Ag/ZrO2, Mn/ZrO2 and Ag-Mn/ZrO2 catalysts under tight contact mode, whereas Ag/ZrO2 exhibited the highest activity and the activity decreased with decreasing the Ag content under loose contact mode.",

author = "Chanmin Lee and Shul, {Yong Gun} and Hisahiro Einaga",

note = "Funding Information: This work was supported by the Industrial Technology Innovation Program funded by the Ministry of Trade, Industry and Energy (MOTIE) , Republic of Korea (grant number 10052076 ). Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

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AU - Lee, Chanmin

AU - Shul, Yong Gun

AU - Einaga, Hisahiro

N1 - Funding Information: This work was supported by the Industrial Technology Innovation Program funded by the Ministry of Trade, Industry and Energy (MOTIE) , Republic of Korea (grant number 10052076 ). Publisher Copyright: © 2016 Elsevier B.V.

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N2 - Mesoporous zirconia (ZrO2) nanofibers were synthesized by an electrospinning method and calcination at 600 °C. Ag and Mn oxides were separately or simultaneously deposited on the ZrO2 nanofibers by impregnation methods. The structure of the ZrO2 supported nanofiber materials were examined by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). Ag and Mn oxides were homogeneously deposited on the surface of ZrO2 nanofibers. Metallic Ag species and Mn2O3 were formed on the ZrO2 nanofibers when they were separately deposited, whereas the codeposition of Ag and Mn changed the oxidation state of Mn oxides on the catalyst surface. The supported catalysts were evaluated for their soot and benzene oxidation performance. The co-deposition of Ag and Mn lowered the light-off temperature for benzene oxidation. The soot oxidation performance was comparable for the Ag/ZrO2, Mn/ZrO2 and Ag-Mn/ZrO2 catalysts under tight contact mode, whereas Ag/ZrO2 exhibited the highest activity and the activity decreased with decreasing the Ag content under loose contact mode.

AB - Mesoporous zirconia (ZrO2) nanofibers were synthesized by an electrospinning method and calcination at 600 °C. Ag and Mn oxides were separately or simultaneously deposited on the ZrO2 nanofibers by impregnation methods. The structure of the ZrO2 supported nanofiber materials were examined by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). Ag and Mn oxides were homogeneously deposited on the surface of ZrO2 nanofibers. Metallic Ag species and Mn2O3 were formed on the ZrO2 nanofibers when they were separately deposited, whereas the codeposition of Ag and Mn changed the oxidation state of Mn oxides on the catalyst surface. The supported catalysts were evaluated for their soot and benzene oxidation performance. The co-deposition of Ag and Mn lowered the light-off temperature for benzene oxidation. The soot oxidation performance was comparable for the Ag/ZrO2, Mn/ZrO2 and Ag-Mn/ZrO2 catalysts under tight contact mode, whereas Ag/ZrO2 exhibited the highest activity and the activity decreased with decreasing the Ag content under loose contact mode.

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