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Pd-doped LaCoO3 regenerative catalyst for automotive emissions control

Paper ID Volume ID Publish Year Pages File Format Full-Text
48154 46495 2008 7 PDF Available
Title
Pd-doped LaCoO3 regenerative catalyst for automotive emissions control
Abstract

The effect of partial substitution of Co by Pd in LaCoO3 perovskite structure (i.e., LaCo0.95Pd0.05O3) and the reductive diffusion of Pd from the bulk of perovskite to its surface, thus forming Pd nanoparticles, on CO and C3H8 oxidation present in air (simulated exhaust gas) are reported. X-ray powder diffraction (XRD) analyses confirm the perovskite structure for the catalysts. Scanning electron microscopy (SEM) and BET surface area measurements show that partial substitution of Co by Pd decreases the crystallite size of the perovskite and therefore increases its surface area. H2-temperature programmed reduction (TPR) experiments reveal that Pd reduces at 135 °C and facilitates the reduction of Co in the perovskite structure. By partial reduction of the Pd containing catalyst at 180 °C for 30 min, the complete oxidation temperatures of CO and C3H8 decrease by about 70 and 50 °C, respectively.The reduction duration of the Pd containing catalyst strongly affects the T50 and T90 temperatures (temperatures at which 50 and 90% conversion occurs, respectively) and has an optimum, where it decreases by increasing the reduction temperature of the catalyst.

Keywords
Pollution; Perovskite; Palladium; Regenerative; Reduction
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Pd-doped LaCoO3 regenerative catalyst for automotive emissions control
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 83, Issues 3–4, 23 September 2008, Pages 214–220
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
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us