Pd-Cu bimetallic catalysts supported on TiO2-CeO2 mixed oxides for aqueous nitrate reduction by hydrogen

Min Sung Kim; Dae Won Lee; Sang Ho Chung; Ji Tae Kim; Il Hyoung Cho; Kwan Young Lee

doi:10.1016/j.molcata.2014.05.034

Pd-Cu bimetallic catalysts supported on TiO₂-CeO₂ mixed oxides for aqueous nitrate reduction by hydrogen

Min Sung Kim, Dae Won Lee, Sang Ho Chung, Ji Tae Kim, Il Hyoung Cho, Kwan Young Lee

Department of Chemical and Biological Engineering

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

26 Citations (Scopus)

Abstract

Pd-Cu supported on TiO₂-CeO₂ mixed oxides (Pd-Cu/TiO₂-CeO₂) were tested for the reduction of nitrate ions in water. Compared with a Pd-Cu catalyst with TiO₂ only as support (Pd-Cu/TiO₂), which was proved to be active for this reaction in our previous study, Pd-Cu/TiO₂-CeO₂ showed improved activity if TiO₂-CeO₂ contained an appropriate amount of ceria (Ti:Ce = 18:1). Especially, the Pd-Cu/TiO₂-CeO₂ (Ti:Ce = 18:1) showed the initial nitrate reduction rate of 3.20 mmol/min/g _cat, eight times higher than that of Pd-Cu/TiO₂ (0.41 mmol/min/g_cat). It was supposed that the improved activity of the catalyst was attributable to the reduced surface (oxygen vacancies) of the support and zero-valence states of the active metals (including the Pd-Cu alloy) in the catalyst.

Original language	English
Pages (from-to)	308-314
Number of pages	7
Journal	Journal of Molecular Catalysis A: Chemical
Volume	392
DOIs	https://doi.org/10.1016/j.molcata.2014.05.034
Publication status	Published - 2014 Oct

Keywords

Bimetallic catalyst
Nitrate reduction
Pd-Cu
Water treatment

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology
Physical and Theoretical Chemistry

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10.1016/j.molcata.2014.05.034

Cite this

@article{c7d776aa7e2445a4a02c86639ffd4cde,

title = "Pd-Cu bimetallic catalysts supported on TiO2-CeO2 mixed oxides for aqueous nitrate reduction by hydrogen",

abstract = "Pd-Cu supported on TiO2-CeO2 mixed oxides (Pd-Cu/TiO2-CeO2) were tested for the reduction of nitrate ions in water. Compared with a Pd-Cu catalyst with TiO2 only as support (Pd-Cu/TiO2), which was proved to be active for this reaction in our previous study, Pd-Cu/TiO2-CeO2 showed improved activity if TiO2-CeO2 contained an appropriate amount of ceria (Ti:Ce = 18:1). Especially, the Pd-Cu/TiO2-CeO2 (Ti:Ce = 18:1) showed the initial nitrate reduction rate of 3.20 mmol/min/g cat, eight times higher than that of Pd-Cu/TiO2 (0.41 mmol/min/gcat). It was supposed that the improved activity of the catalyst was attributable to the reduced surface (oxygen vacancies) of the support and zero-valence states of the active metals (including the Pd-Cu alloy) in the catalyst.",

keywords = "Bimetallic catalyst, Nitrate reduction, Pd-Cu, Water treatment",

author = "Kim, {Min Sung} and Lee, {Dae Won} and Chung, {Sang Ho} and Kim, {Ji Tae} and Cho, {Il Hyoung} 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 = "2014",

month = oct,

doi = "10.1016/j.molcata.2014.05.034",

language = "English",

volume = "392",

pages = "308--314",

journal = "Journal of Molecular Catalysis A: Chemical",

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TY - JOUR

T1 - Pd-Cu bimetallic catalysts supported on TiO2-CeO2 mixed oxides for aqueous nitrate reduction by hydrogen

AU - Kim, Min Sung

AU - Lee, Dae Won

AU - Chung, Sang Ho

AU - Kim, Ji Tae

AU - Cho, Il Hyoung

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 - 2014/10

Y1 - 2014/10

N2 - Pd-Cu supported on TiO2-CeO2 mixed oxides (Pd-Cu/TiO2-CeO2) were tested for the reduction of nitrate ions in water. Compared with a Pd-Cu catalyst with TiO2 only as support (Pd-Cu/TiO2), which was proved to be active for this reaction in our previous study, Pd-Cu/TiO2-CeO2 showed improved activity if TiO2-CeO2 contained an appropriate amount of ceria (Ti:Ce = 18:1). Especially, the Pd-Cu/TiO2-CeO2 (Ti:Ce = 18:1) showed the initial nitrate reduction rate of 3.20 mmol/min/g cat, eight times higher than that of Pd-Cu/TiO2 (0.41 mmol/min/gcat). It was supposed that the improved activity of the catalyst was attributable to the reduced surface (oxygen vacancies) of the support and zero-valence states of the active metals (including the Pd-Cu alloy) in the catalyst.

AB - Pd-Cu supported on TiO2-CeO2 mixed oxides (Pd-Cu/TiO2-CeO2) were tested for the reduction of nitrate ions in water. Compared with a Pd-Cu catalyst with TiO2 only as support (Pd-Cu/TiO2), which was proved to be active for this reaction in our previous study, Pd-Cu/TiO2-CeO2 showed improved activity if TiO2-CeO2 contained an appropriate amount of ceria (Ti:Ce = 18:1). Especially, the Pd-Cu/TiO2-CeO2 (Ti:Ce = 18:1) showed the initial nitrate reduction rate of 3.20 mmol/min/g cat, eight times higher than that of Pd-Cu/TiO2 (0.41 mmol/min/gcat). It was supposed that the improved activity of the catalyst was attributable to the reduced surface (oxygen vacancies) of the support and zero-valence states of the active metals (including the Pd-Cu alloy) in the catalyst.

KW - Bimetallic catalyst

KW - Nitrate reduction

KW - Pd-Cu

KW - Water treatment

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