This work addresses the low-temperature NO, abatement under oxygen-rich conditions using H-2 as reductant. For this purpose Pt/ZrO2 and Pt/WO3/ZrO2 catalysts are developed and characterised by temperature-programmed desorption of H-2 (H-2-TPD), N-2 physisorption (BET) and powder X-ray diffraction (PXRD). The most active catalyst is a Pt/WO3/ZrO2 pattern with a Pt load of 0.3 wt.% and a W content of 11 wt.%. This material reveals high deNO(x) activity below 200 degrees C and high overall N-2 selectivity of about 90%. Additionally, the catalyst exhibits outstanding hydrothermal stability as well as resistance against SOx. Furthermore, the transfer from the powder level to real honeycomb systems leads to promising performance as well. Diffuse reflectance Fourier transform infrared spectroscopic studies, kinetic modelling of temperature-programmed desorption of O-2 (O-2-TPD) and NOx-TPD examinations indicate that the pronounced H-2-deNO(x) performance of the Pt/WO3/ZrO2 catalyst is related to the electronic interaction of WO3 with the precious metal. The tungsten promoter increases the electron density on the Pt thus activating the sample for H-2-deNO(x) and N-2 formation, respectively. Contrary, NOx surface species formed on the WO3/ZrO2 support are not supposed to be involved in the H-2-deNO(x) reaction. (C) 2008 Elsevier B.V. All rights reserved.