Noble Metal Free NOx Storage Catalysts Using Cobalt Discovered Via High-Throughput Experimentation

Author(s)

Rohit Vijay
Reed J. Hendershot
Sindia M. Rivera-Jiménez
W. Benjamin Rogers
Benjamin J. Feist
Christopher M. Snively
Jochen A. Lauterbach, University of South Carolina - ColumbiaFollow

Document Type

Article

Subject Area(s)

Engineering, Chemical Engineering, Catalysis and Reaction Engineering

Abstract

The addition of manganese, iron, and cobalt to NO_x storage and reduction (NSR) catalysts containing 1% w/w platinum and 15% w/w barium (1Pt/15Ba) on γ-Al2O3 has been studied. Under fuel lean conditions, the addition of Mn or Fe slightly improved the NOx storage, while the addition of Co more than doubled the NO_x storage. In addition, a noble metal free 5Co/15Ba catalyst was found to store NO_x as efficiently as a 1Pt/15Ba NSR catalyst. This increase in efficiency is associated with the strong oxidizing effect of Co, providing nitric oxide oxidation sites and contact area for NO₂ spillover to the Ba NO_x storage sites. By utilizing Co as an oxidizing metal instead of Pt, the storage capacity of NSR catalysts can be improved without the need for an expensive noble metal oxidizing catalyst.

Digital Object Identifier (DOI)

https://doi.org/10.1016/j.catcom.2004.12.004

Publication Info

Published in Catalysis Communications, Volume 6, Issue 2, 2005, pages 167-171.

© Catalysis Communications, 2005, Elsevier

APA Citation

Vijay, R., Hendershot, J.R., Rivera-Jiménez, M.S., Rogers, B.W., Feist, J.B., Snively, M.C., Lauterbach, A.J. (2005). Noble Metal Free NO_x Storage Catalysts Using Cobalt Discovered via High-throughput Experimentation. Catalysis Communications, 6(2), 167-171.

http://dx.doi.org/10.1016/j.catcom.2004.12.004

Rights

© Catalysis Communications, 2005, Elsevier