Fanny Colinot, Frédéric Meunier and Marco Daturi
Laboratoire Catalyse et Spectrochimie, ENSICAEN, Université de Caen, CNRS, 6 Bd Maréchal Juin, F-14050 Caen, France

Introduction

Forthcoming regulations dealing with the protection of the environment together with rocketing fossil fuel prices are pushing for better engine efficiencies. In this respect, Low Temperature Combustion (LTC) systems are currently receiving a lot of interest. However, these systems require new exhaust gas treatment catalysts able to oxidise relatively high concentrations of CO and residual hydrocarbons at low temperatures, while the NO present should preferably not be oxidised to NO2. The new catalytic materials must be durable under the severe post-combustion conditions (e.g. high temperature spikes, high steam concentration) and should contain the lowest possible amount of expensive noble metals.

In the present study, operando infrared (IR) spectroscopy was used to investigate under realistic conditions the oxidation activity of Pt and Pd supported on different oxides, with the aim of generating mechanistic information that will be used for the design of improved formulations.

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