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In situ DRIFTS investigation on the NOx storage mechanisms over Pt/K/TiO2–ZrO2 catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
51613 46848 2008 5 PDF Available
Title
In situ DRIFTS investigation on the NOx storage mechanisms over Pt/K/TiO2–ZrO2 catalyst
Abstract

The NSR catalyst Pt/K/TiO2–ZrO2 was prepared by successive impregnation. In situ DRIFTS technique was employed to investigate the NOx storage mechanisms. The results show that no adsorbed NOx species were detected over TiO2–ZrO2, while nitrite and nitrate species could be identified simultaneously over K/TiO2–ZrO2. After Pt deposition, only nitrates species, such as free nitrate ions and monodentate or bidentate nitrates, were observed. The main NOx storage route is via the potassium sites (I) adjacent to Pt, the potassium sites (II) away from Pt trap NOx only after the saturation of potassium sites (I).

Keywords
NOx storage; Mechanism; TiO2–ZrO2; Potassium
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In situ DRIFTS investigation on the NOx storage mechanisms over Pt/K/TiO2–ZrO2 catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 10, Issue 2, 15 November 2008, Pages 173–177
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
Online Support
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