Effect of Ti 3+ on TiO 2-supported Cu catalysts used for CO oxidation

Ching S. Chen; Tse C. Chen; Chen C. Chen; Yuan T. Lai; Jiann H. You; Te M. Chou; Ching H. Chen; Jyh Fu Lee

doi:10.1021/la301684h

Effect of Ti ³⁺ on TiO ₂-supported Cu catalysts used for CO oxidation

Ching S. Chen^*
, Tse C. Chen
, Chen C. Chen
, Yuan T. Lai
, Jiann H. You
, Te M. Chou
, Ching H. Chen
, Jyh Fu Lee

^*Corresponding author for this work

Division of Natural Science

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

115 Scopus citations

Abstract

In this paper, we have shown that Cu/TiO ₂ catalysts are highly active in CO oxidation. For instance, a 3.4% Cu/TiO ₂ catalyst exhibits a higher turnover rate for the effective removal of CO in air than 3-5% Pt/TiO ₂ and 20% Cu/ZnO/Al ₂O ₃ catalysts. A small amount of Cu ⁺ species is formed during the calcination treatment at 225 °C, which is the main active phase for the CO oxidation. However, it is proposed that some highly dispersed CuO can also form in the TiO ₂ lattice during the calcination treatment. Furthermore, a strong electron interaction between Cu ²⁺ in highly dispersed CuO and Ti ³⁺ on rutile TiO ₂ (Cu ²⁺+Ti ³⁺→ Cu ⁺+Ti ⁴⁺) has been shown to occur. Overall, the reduction of Cu ⁺ is a major factor that contributes to the reaction rate of the CO oxidation.

Original language	English
Pages (from-to)	9996-10006
Number of pages	11
Journal	Langmuir
Volume	28
Issue number	26
DOIs	https://doi.org/10.1021/la301684h
State	Published - 03 07 2012

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@article{06f8fb72bbd74b67b58bdc3754a510da,

title = "Effect of Ti 3+ on TiO 2-supported Cu catalysts used for CO oxidation",

abstract = "In this paper, we have shown that Cu/TiO 2 catalysts are highly active in CO oxidation. For instance, a 3.4\% Cu/TiO 2 catalyst exhibits a higher turnover rate for the effective removal of CO in air than 3-5\% Pt/TiO 2 and 20\% Cu/ZnO/Al 2O 3 catalysts. A small amount of Cu + species is formed during the calcination treatment at 225 °C, which is the main active phase for the CO oxidation. However, it is proposed that some highly dispersed CuO can also form in the TiO 2 lattice during the calcination treatment. Furthermore, a strong electron interaction between Cu 2+ in highly dispersed CuO and Ti 3+ on rutile TiO 2 (Cu 2++Ti 3+→ Cu ++Ti 4+) has been shown to occur. Overall, the reduction of Cu + is a major factor that contributes to the reaction rate of the CO oxidation.",

author = "Chen, \{Ching S.\} and Chen, \{Tse C.\} and Chen, \{Chen C.\} and Lai, \{Yuan T.\} and You, \{Jiann H.\} and Chou, \{Te M.\} and Chen, \{Ching H.\} and Lee, \{Jyh Fu\}",

year = "2012",

month = jul,

day = "3",

doi = "10.1021/la301684h",

language = "英语",

volume = "28",

pages = "9996--10006",

journal = "Langmuir",

issn = "0743-7463",

publisher = "American Chemical Society",

number = "26",

}

TY - JOUR

T1 - Effect of Ti 3+ on TiO 2-supported Cu catalysts used for CO oxidation

AU - Chen, Ching S.

AU - Chen, Tse C.

AU - Chen, Chen C.

AU - Lai, Yuan T.

AU - You, Jiann H.

AU - Chou, Te M.

AU - Chen, Ching H.

AU - Lee, Jyh Fu

PY - 2012/7/3

Y1 - 2012/7/3

N2 - In this paper, we have shown that Cu/TiO 2 catalysts are highly active in CO oxidation. For instance, a 3.4% Cu/TiO 2 catalyst exhibits a higher turnover rate for the effective removal of CO in air than 3-5% Pt/TiO 2 and 20% Cu/ZnO/Al 2O 3 catalysts. A small amount of Cu + species is formed during the calcination treatment at 225 °C, which is the main active phase for the CO oxidation. However, it is proposed that some highly dispersed CuO can also form in the TiO 2 lattice during the calcination treatment. Furthermore, a strong electron interaction between Cu 2+ in highly dispersed CuO and Ti 3+ on rutile TiO 2 (Cu 2++Ti 3+→ Cu ++Ti 4+) has been shown to occur. Overall, the reduction of Cu + is a major factor that contributes to the reaction rate of the CO oxidation.

AB - In this paper, we have shown that Cu/TiO 2 catalysts are highly active in CO oxidation. For instance, a 3.4% Cu/TiO 2 catalyst exhibits a higher turnover rate for the effective removal of CO in air than 3-5% Pt/TiO 2 and 20% Cu/ZnO/Al 2O 3 catalysts. A small amount of Cu + species is formed during the calcination treatment at 225 °C, which is the main active phase for the CO oxidation. However, it is proposed that some highly dispersed CuO can also form in the TiO 2 lattice during the calcination treatment. Furthermore, a strong electron interaction between Cu 2+ in highly dispersed CuO and Ti 3+ on rutile TiO 2 (Cu 2++Ti 3+→ Cu ++Ti 4+) has been shown to occur. Overall, the reduction of Cu + is a major factor that contributes to the reaction rate of the CO oxidation.

UR - https://www.scopus.com/pages/publications/84863442360

U2 - 10.1021/la301684h

DO - 10.1021/la301684h

M3 - 文章

C2 - 22676402

AN - SCOPUS:84863442360

SN - 0743-7463

VL - 28

SP - 9996

EP - 10006

JO - Langmuir

JF - Langmuir

IS - 26

ER -

Effect of Ti ³⁺ on TiO ₂-supported Cu catalysts used for CO oxidation

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