Water-promoted low-concentration NO removal at room temperature by Mg-doped manganese oxides OMS-2

Weimin Huang; Jianlin Shi

doi:10.1016/j.apcata.2015.09.015

Water-promoted low-concentration NO removal at room temperature by Mg-doped manganese oxides OMS-2

Weimin Huang^*
, Jianlin Shi

^*Corresponding author for this work

CAS - Shanghai Institute of Ceramics

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

22 Scopus citations

Abstract

Nanostructured magnesium doped manganese oxides (Mg-SC-OMS-2) was prepared through doping Mg into OMS-2 using an ultrasound-assisted approach. This Mg-SC-OMS-2 material showed low crystallinity with a large surface area and extensive defects which are totally different from those synthesized by conventional method. Extraordinarily high NO removal performance was obtained. It retained 99% NO removal ratio for as long as 8 h under extremely high space velocity of 120,000 mL/g/h. More attractively, when water vapor was introduced, above 50% removal ratio of catalyst was maintained for as long as 250 h. The high catalytic activity of Mg-SC-OMS-2 is associated with presence of redox pair Mn³⁺/Mn⁴⁺ and activated oxygen species at oxygen vacancies occurring via the pathway of Mars-van Krevelen mechanism.

Original language	English
Article number	15547
Pages (from-to)	65-74
Number of pages	10
Journal	Applied Catalysis A: General
Volume	507
DOIs	https://doi.org/10.1016/j.apcata.2015.09.015
State	Published - 25 Oct 2015
Externally published	Yes

Keywords

Catalytic oxidation
Magnesium
Manganese oxide OMS
NOx

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10.1016/j.apcata.2015.09.015

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title = "Water-promoted low-concentration NO removal at room temperature by Mg-doped manganese oxides OMS-2",

abstract = "Nanostructured magnesium doped manganese oxides (Mg-SC-OMS-2) was prepared through doping Mg into OMS-2 using an ultrasound-assisted approach. This Mg-SC-OMS-2 material showed low crystallinity with a large surface area and extensive defects which are totally different from those synthesized by conventional method. Extraordinarily high NO removal performance was obtained. It retained 99\% NO removal ratio for as long as 8 h under extremely high space velocity of 120,000 mL/g/h. More attractively, when water vapor was introduced, above 50\% removal ratio of catalyst was maintained for as long as 250 h. The high catalytic activity of Mg-SC-OMS-2 is associated with presence of redox pair Mn3+/Mn4+ and activated oxygen species at oxygen vacancies occurring via the pathway of Mars-van Krevelen mechanism.",

keywords = "Catalytic oxidation, Magnesium, Manganese oxide OMS, NOx",

author = "Weimin Huang and Jianlin Shi",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier B.V.",

year = "2015",

month = oct,

day = "25",

doi = "10.1016/j.apcata.2015.09.015",

language = "英语",

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pages = "65--74",

journal = "Applied Catalysis A: General",

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TY - JOUR

T1 - Water-promoted low-concentration NO removal at room temperature by Mg-doped manganese oxides OMS-2

AU - Huang, Weimin

AU - Shi, Jianlin

PY - 2015/10/25

Y1 - 2015/10/25

N2 - Nanostructured magnesium doped manganese oxides (Mg-SC-OMS-2) was prepared through doping Mg into OMS-2 using an ultrasound-assisted approach. This Mg-SC-OMS-2 material showed low crystallinity with a large surface area and extensive defects which are totally different from those synthesized by conventional method. Extraordinarily high NO removal performance was obtained. It retained 99% NO removal ratio for as long as 8 h under extremely high space velocity of 120,000 mL/g/h. More attractively, when water vapor was introduced, above 50% removal ratio of catalyst was maintained for as long as 250 h. The high catalytic activity of Mg-SC-OMS-2 is associated with presence of redox pair Mn3+/Mn4+ and activated oxygen species at oxygen vacancies occurring via the pathway of Mars-van Krevelen mechanism.

AB - Nanostructured magnesium doped manganese oxides (Mg-SC-OMS-2) was prepared through doping Mg into OMS-2 using an ultrasound-assisted approach. This Mg-SC-OMS-2 material showed low crystallinity with a large surface area and extensive defects which are totally different from those synthesized by conventional method. Extraordinarily high NO removal performance was obtained. It retained 99% NO removal ratio for as long as 8 h under extremely high space velocity of 120,000 mL/g/h. More attractively, when water vapor was introduced, above 50% removal ratio of catalyst was maintained for as long as 250 h. The high catalytic activity of Mg-SC-OMS-2 is associated with presence of redox pair Mn3+/Mn4+ and activated oxygen species at oxygen vacancies occurring via the pathway of Mars-van Krevelen mechanism.

KW - Catalytic oxidation

KW - Magnesium

KW - Manganese oxide OMS

KW - NOx

UR - https://www.scopus.com/pages/publications/84943252323

U2 - 10.1016/j.apcata.2015.09.015

DO - 10.1016/j.apcata.2015.09.015

M3 - 文章

AN - SCOPUS:84943252323

SN - 0926-860X

VL - 507

SP - 65

EP - 74

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

M1 - 15547

ER -

Water-promoted low-concentration NO removal at room temperature by Mg-doped manganese oxides OMS-2

Abstract

Keywords

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