Mechanism understanding of NOx storage, release and reduction on Pt/Doped ceria catalysts

Abstract

This doctoral thesis addresses the pressing need for advanced emission control technologies in diesel engines to meet stringent governmental regulations targeting harmful pollutants, especially nitrogen oxides (NOx).

Catalysis, particularly involving ceria doped with rare earth metals, is a promising avenue for enhancing NOx reduction in diesel exhausts. The study explores the substantial impact of rare earth metal doping, specifically utilising samarium (Sm), on the low-temperature NOx storage capabilities of ceria-based catalysts, including platinum* ceria catalysts with varied platinum loadings.

Through diverse characterisation techniques, the research investigates the complexities between RE metal addition, especially Sm, surface chemistry modifications, and resulting behaviours related to NOx storage and reduction.

Date of Award	Jul 2024
Original language	English
Awarding Institution	Queen's University Belfast
Sponsors	Johnson Matthey PLC
Supervisor	Danai Poulidi (Supervisor) & Nancy Artioli (Supervisor)