In situ IR studies of Co and Ce doped Mn/TiO                         2                          catalyst for low-temperature selective catalytic reduction of NO with NH                         3

Lu Qiu; Dandan Pang; Changliang Zhang; Jiaojiao Meng; Rongshu Zhu; Feng Ouyang

doi:10.1016/j.apsusc.2015.08.259

In situ IR studies of Co and Ce doped Mn/TiO ₂ catalyst for low-temperature selective catalytic reduction of NO with NH ₃

Lu Qiu
, Dandan Pang
, Changliang Zhang
, Jiaojiao Meng
, Rongshu Zhu
, Feng Ouyang^*

^*Corresponding author for this work

Harbin Institute of Technology Shenzhen

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

105 Scopus citations

Abstract

The Mn-Co-Ce/TiO ₂ catalyst was prepared by wet co-impregnation method for selective catalytic reduction of NO by NH ₃ in the presence of oxygen. The adsorption and co-adsorption of NH ₃ , NO and O ₂ on catalysts were investigated by in situ FTIR spectroscopy. The results suggested that addition of cobalt and cerium oxides increased the numbers of acid and redox sites. Especially, the cobalt oxide produced lots of Brønsted acid sites, which favor to the adsorption of coordinated NH ₃ through NH ₃ migration. Ce addition improved amide ions formation to reach best NO reduction selectivity. A mechanistic pathway over Mn-Co-Ce/TiO ₂ was proposed. At low-temperature SCR reaction, coordinated NH ₃ reacted with NO ₂ ^- , and amide reacted with NO (ad) or NO (g) to form N ₂ . NO ₂ was related to the formation of nitrite on Co-contained catalysts and the generation of -NH ₂ ^- on Ce-contained catalysts. At high temperature, the other branch reaction also occurred between the coordinated NH ₃ and nitrate species, resulting in N ₂ O yield increase.

Original language	English
Pages (from-to)	189-196
Number of pages	8
Journal	Applied Surface Science
Volume	357
DOIs	https://doi.org/10.1016/j.apsusc.2015.08.259
State	Published - 1 Dec 2015
Externally published	Yes

Keywords

Adsorption
IR
Mechanism
NO reduction
SCR

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10.1016/j.apsusc.2015.08.259

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Qiu, L., Pang, D., Zhang, C., Meng, J., Zhu, R., & Ouyang, F. (2015). In situ IR studies of Co and Ce doped Mn/TiO ₂ catalyst for low-temperature selective catalytic reduction of NO with NH ₃ Applied Surface Science, 357, 189-196. https://doi.org/10.1016/j.apsusc.2015.08.259

@article{d4baf9109e01477aa9bd25c87b5b6ca6,

title = " In situ IR studies of Co and Ce doped Mn/TiO 2 catalyst for low-temperature selective catalytic reduction of NO with NH 3 ",

abstract = " The Mn-Co-Ce/TiO 2 catalyst was prepared by wet co-impregnation method for selective catalytic reduction of NO by NH 3 in the presence of oxygen. The adsorption and co-adsorption of NH 3 , NO and O 2 on catalysts were investigated by in situ FTIR spectroscopy. The results suggested that addition of cobalt and cerium oxides increased the numbers of acid and redox sites. Especially, the cobalt oxide produced lots of Br{\o}nsted acid sites, which favor to the adsorption of coordinated NH 3 through NH 3 migration. Ce addition improved amide ions formation to reach best NO reduction selectivity. A mechanistic pathway over Mn-Co-Ce/TiO 2 was proposed. At low-temperature SCR reaction, coordinated NH 3 reacted with NO 2 - , and amide reacted with NO (ad) or NO (g) to form N 2 . NO 2 was related to the formation of nitrite on Co-contained catalysts and the generation of -NH 2 - on Ce-contained catalysts. At high temperature, the other branch reaction also occurred between the coordinated NH 3 and nitrate species, resulting in N 2 O yield increase.",

keywords = "Adsorption, IR, Mechanism, NO reduction, SCR",

author = "Lu Qiu and Dandan Pang and Changliang Zhang and Jiaojiao Meng and Rongshu Zhu and Feng Ouyang",

year = "2015",

month = dec,

day = "1",

doi = "10.1016/j.apsusc.2015.08.259",

language = "英语",

volume = "357",

pages = "189--196",

journal = "Applied Surface Science",

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publisher = "Elsevier B.V.",

}

Qiu, L, Pang, D, Zhang, C, Meng, J, Zhu, R & Ouyang, F 2015, ' In situ IR studies of Co and Ce doped Mn/TiO ₂ catalyst for low-temperature selective catalytic reduction of NO with NH ₃ ', Applied Surface Science, vol. 357, pp. 189-196. https://doi.org/10.1016/j.apsusc.2015.08.259

In situ IR studies of Co and Ce doped Mn/TiO ₂ catalyst for low-temperature selective catalytic reduction of NO with NH ₃ . / Qiu, Lu; Pang, Dandan; Zhang, Changliang et al.
In: Applied Surface Science, Vol. 357, 01.12.2015, p. 189-196.

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

TY - JOUR

T1 - In situ IR studies of Co and Ce doped Mn/TiO 2 catalyst for low-temperature selective catalytic reduction of NO with NH 3

AU - Qiu, Lu

AU - Pang, Dandan

AU - Zhang, Changliang

AU - Meng, Jiaojiao

AU - Zhu, Rongshu

AU - Ouyang, Feng

PY - 2015/12/1

Y1 - 2015/12/1

N2 - The Mn-Co-Ce/TiO 2 catalyst was prepared by wet co-impregnation method for selective catalytic reduction of NO by NH 3 in the presence of oxygen. The adsorption and co-adsorption of NH 3 , NO and O 2 on catalysts were investigated by in situ FTIR spectroscopy. The results suggested that addition of cobalt and cerium oxides increased the numbers of acid and redox sites. Especially, the cobalt oxide produced lots of Brønsted acid sites, which favor to the adsorption of coordinated NH 3 through NH 3 migration. Ce addition improved amide ions formation to reach best NO reduction selectivity. A mechanistic pathway over Mn-Co-Ce/TiO 2 was proposed. At low-temperature SCR reaction, coordinated NH 3 reacted with NO 2 - , and amide reacted with NO (ad) or NO (g) to form N 2 . NO 2 was related to the formation of nitrite on Co-contained catalysts and the generation of -NH 2 - on Ce-contained catalysts. At high temperature, the other branch reaction also occurred between the coordinated NH 3 and nitrate species, resulting in N 2 O yield increase.

AB - The Mn-Co-Ce/TiO 2 catalyst was prepared by wet co-impregnation method for selective catalytic reduction of NO by NH 3 in the presence of oxygen. The adsorption and co-adsorption of NH 3 , NO and O 2 on catalysts were investigated by in situ FTIR spectroscopy. The results suggested that addition of cobalt and cerium oxides increased the numbers of acid and redox sites. Especially, the cobalt oxide produced lots of Brønsted acid sites, which favor to the adsorption of coordinated NH 3 through NH 3 migration. Ce addition improved amide ions formation to reach best NO reduction selectivity. A mechanistic pathway over Mn-Co-Ce/TiO 2 was proposed. At low-temperature SCR reaction, coordinated NH 3 reacted with NO 2 - , and amide reacted with NO (ad) or NO (g) to form N 2 . NO 2 was related to the formation of nitrite on Co-contained catalysts and the generation of -NH 2 - on Ce-contained catalysts. At high temperature, the other branch reaction also occurred between the coordinated NH 3 and nitrate species, resulting in N 2 O yield increase.

KW - Adsorption

KW - IR

KW - Mechanism

KW - NO reduction

KW - SCR

UR - https://www.scopus.com/pages/publications/84949765980

U2 - 10.1016/j.apsusc.2015.08.259

DO - 10.1016/j.apsusc.2015.08.259

M3 - 文章

AN - SCOPUS:84949765980

SN - 0169-4332

VL - 357

SP - 189

EP - 196

JO - Applied Surface Science

JF - Applied Surface Science

ER -

Qiu L, Pang D, Zhang C, Meng J, Zhu R, Ouyang F. In situ IR studies of Co and Ce doped Mn/TiO ₂ catalyst for low-temperature selective catalytic reduction of NO with NH ₃ Applied Surface Science. 2015 Dec 1;357:189-196. doi: 10.1016/j.apsusc.2015.08.259

In situ IR studies of Co and Ce doped Mn/TiO ₂ catalyst for low-temperature selective catalytic reduction of NO with NH ₃

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Keywords

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