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

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

30 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

Bibliographical note

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

Keywords

Bimetallic catalyst
Nitrate reduction
Pd-Cu
Water treatment

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology
Physical and Theoretical Chemistry

Access to Document

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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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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