Colorimetric assay for a fast parallel screening of NOx storage

被引：5

作者：

Park, Joo-Hyoung

Han, Min Su

Park, Sang Jun

Kim, Dong H.

Nam, In-Sik ^{[1
]}

Yeo, Gwon Koo

Kil, Jeong Ki

Youn, Young Kee

机构：

[1] Pohang Univ Sci & Technol, POSTECH, Sch Environm Sci & Engn, Dept Chem Engn, Pohang, South Korea

[2] Pohang Univ Sci & Technol, POSTECH, Dept Chem, Pohang, South Korea

[3] Hyundai Motors Co, Div Res & Dev, Whasung Si, South Korea

[4] Kia Motors Corp, Whasung Si, South Korea

来源：

JOURNAL OF CATALYSIS | 2006年 / 241卷 / 02期

关键词：

colorimetric assay; NOx storage-reduction catalyst; naked eye sensing; nitrite sensor;

D O I：

10.1016/j.jcat.2006.04.037

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A fast parallel method for determining the capacity of an automotive catalyst to trap and especially store NOx has been established. A three-step approach, including parallel adsorption of NO onto the catalyst samples, water extraction of trapped NOx in the form of NO2- and NO3- in an aqueous solution, and colorimetric assay based on the sensitive and dramatic color change from colorless to deep red of the organic dye through the Griess diazotation reaction has been performed sequentially to give a fast parallel and quantitative evaluation of the amount of NOx trapped over promising automotive catalysts. The results correlate well with those obtained by means of traditional, time-consuming techniques, such as temperature-programmed desorption. (c) 2006 Elsevier Inc. All rights reserved.

引用

页码：470 / 474

页数：5

共 21 条

[1] Removal of nitrogen oxides from the exhaust of a lean-tune gasoline engine [J].