Catalytic reduction of nitrate in water over Pd-Cu/TiO2 catalyst: Effect of the strong metal-support interaction (SMSI) on the catalytic activity

Min Sung Kim; Sang Ho Chung; Chun Jae Yoo; Myung Suk Lee; Il Hyoung Cho; Dae Won Lee; Kwan Young Lee

doi:10.1016/j.apcatb.2013.05.033

Catalytic reduction of nitrate in water over Pd-Cu/TiO₂ catalyst: Effect of the strong metal-support interaction (SMSI) on the catalytic activity

Min Sung Kim, Sang Ho Chung, Chun Jae Yoo, Myung Suk Lee, Il Hyoung Cho, Dae Won Lee, Kwan Young Lee

Department of Chemical and Biological Engineering

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

119 Citations (Scopus)

Abstract

In this study, we prepared TiO₂-supported Pd-Cu catalysts of different anatase/rutile phase compositions, which were used in a nitrate reduction in water. It was shown that the catalysts containing a greater anatase phase composition had higher catalytic performance. Through characterization studies using H₂-temperature programmed reduction (H₂-TPR) and X-ray photoelectron spectroscopy (XPS), the observed trend of the catalytic activity was correlated to the degree of the strong metal-support interaction (SMSI) over the catalysts. The SMSI occurred through pre-treatment of the catalysts by H₂ reduction (at 200°C), which resulted in increased partially reduced TiO_2-x and electron-rich active metal (Pd and Cu) states at the catalyst of higher composition of anatase phase. The relationships between the changes in the properties and activities of the catalysts as a result of the anatase phase composition are discussed.

Original language	English
Pages (from-to)	354-361
Number of pages	8
Journal	Applied Catalysis B: Environmental
Volume	142-143
DOIs	https://doi.org/10.1016/j.apcatb.2013.05.033
Publication status	Published - 2013 Oct

Keywords

H-TPR
Nitrate reduction
Pd-Cu/TiO
SMSI
XPS

ASJC Scopus subject areas

Catalysis
Environmental Science(all)
Process Chemistry and Technology

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10.1016/j.apcatb.2013.05.033

Cite this

@article{c0fb675480034c2c9c00dfcdb59d5bd8,

title = "Catalytic reduction of nitrate in water over Pd-Cu/TiO2 catalyst: Effect of the strong metal-support interaction (SMSI) on the catalytic activity",

abstract = "In this study, we prepared TiO2-supported Pd-Cu catalysts of different anatase/rutile phase compositions, which were used in a nitrate reduction in water. It was shown that the catalysts containing a greater anatase phase composition had higher catalytic performance. Through characterization studies using H2-temperature programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS), the observed trend of the catalytic activity was correlated to the degree of the strong metal-support interaction (SMSI) over the catalysts. The SMSI occurred through pre-treatment of the catalysts by H2 reduction (at 200°C), which resulted in increased partially reduced TiO2-x and electron-rich active metal (Pd and Cu) states at the catalyst of higher composition of anatase phase. The relationships between the changes in the properties and activities of the catalysts as a result of the anatase phase composition are discussed.",

keywords = "H-TPR, Nitrate reduction, Pd-Cu/TiO, SMSI, XPS",

author = "Kim, {Min Sung} and Chung, {Sang Ho} and Yoo, {Chun Jae} and Lee, {Myung Suk} and Cho, {Il Hyoung} and Lee, {Dae Won} and Lee, {Kwan Young}",

note = "Funding Information: This work is supported by Korea Ministry of Environment as “Global Top Project” (Project No.: GT-11-B-01-007-0).",

year = "2013",

month = oct,

doi = "10.1016/j.apcatb.2013.05.033",

language = "English",

volume = "142-143",

pages = "354--361",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

publisher = "Elsevier",

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T1 - Catalytic reduction of nitrate in water over Pd-Cu/TiO2 catalyst

T2 - Effect of the strong metal-support interaction (SMSI) on the catalytic activity

AU - Kim, Min Sung

AU - Chung, Sang Ho

AU - Yoo, Chun Jae

AU - Lee, Myung Suk

AU - Cho, Il Hyoung

AU - Lee, Dae Won

AU - Lee, Kwan Young

N1 - Funding Information: This work is supported by Korea Ministry of Environment as “Global Top Project” (Project No.: GT-11-B-01-007-0).

PY - 2013/10

Y1 - 2013/10

N2 - In this study, we prepared TiO2-supported Pd-Cu catalysts of different anatase/rutile phase compositions, which were used in a nitrate reduction in water. It was shown that the catalysts containing a greater anatase phase composition had higher catalytic performance. Through characterization studies using H2-temperature programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS), the observed trend of the catalytic activity was correlated to the degree of the strong metal-support interaction (SMSI) over the catalysts. The SMSI occurred through pre-treatment of the catalysts by H2 reduction (at 200°C), which resulted in increased partially reduced TiO2-x and electron-rich active metal (Pd and Cu) states at the catalyst of higher composition of anatase phase. The relationships between the changes in the properties and activities of the catalysts as a result of the anatase phase composition are discussed.

AB - In this study, we prepared TiO2-supported Pd-Cu catalysts of different anatase/rutile phase compositions, which were used in a nitrate reduction in water. It was shown that the catalysts containing a greater anatase phase composition had higher catalytic performance. Through characterization studies using H2-temperature programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS), the observed trend of the catalytic activity was correlated to the degree of the strong metal-support interaction (SMSI) over the catalysts. The SMSI occurred through pre-treatment of the catalysts by H2 reduction (at 200°C), which resulted in increased partially reduced TiO2-x and electron-rich active metal (Pd and Cu) states at the catalyst of higher composition of anatase phase. The relationships between the changes in the properties and activities of the catalysts as a result of the anatase phase composition are discussed.

KW - H-TPR

KW - Nitrate reduction

KW - Pd-Cu/TiO

KW - SMSI

KW - XPS

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DO - 10.1016/j.apcatb.2013.05.033

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