Catalytic decomposition of N2O on supported Pd catalysts: Support and thermal ageing effects on the catalytic performances

✍ Scribed by J.P. Dacquin; C. Dujardin; P. Granger

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 534 KB
• Volume: 137
• Category: Article
• ISSN: 0920-5861
• DOI: 10.1016/j.cattod.2008.01.016

✦ Synopsis

This study is devoted to the catalytic decomposition of N 2 O over noble metal-based catalysts under lean conditions in the presence of O 2 , NO and water. A particular attention has been paid toward the influence of the support and the thermal ageing-induced effects on the catalytic properties of palladium species. In those operating conditions, the deposition of palladium on reducible supports, such as LaCoO 3 , leads to higher activity in comparison with conventional supports such as alumina. Surface reconstructions take place during thermal ageing under reactive conditions on pre-reduced perovskite-based catalysts which lead to a significant rate enhancement in the decomposition of N 2 O. On the other hand, it was found that oxygen and water strongly inhibit the surface reconstructions associated with changes in the selectivity towards the production of NO 2 .