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Aspects of the Role of Hydrogen in H2-Assisted HC–SCR Over Ag–Al2O3

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Abstract

The role of hydrogen in H2-assisted HC–SCR of NO x over Ag–Al2O3 is investigated by XPS and in situ DRIFT spectroscopy. Hydrogen does not reduce the surface silver species to metallic silver, however direct reduction of surface nitrates by hydrogen is observed. It is proposed that one important role of hydrogen is the removal of nitrates from the Ag–Al2O3 surface.

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Acknowledgements

This work is financially supported by MISTRA (The Foundation for Strategic Environmental Research) and the Swedish Road Administration and has been performed as part of the MISTRA programme E4 (Energy Efficient Reduction of Exhaust Emissions from Vehicles), within the Competence Centre for Catalysis (KCK). KCK is financially supported by Chalmers University of Technology, the Swedish Energy Agency and the member companies: AB Volvo, Volvo Car Corporation, Scania CV AB, GM Powertrain Sweden AB, Haldor Topsøe A/S and The Swedish Space Corporation. Financial support from Knut and Alice Wallenberg Foundation, Dnr KAW 2005.0055, is gratefully acknowledged.

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Authors and Affiliations

  1. Competence Centre for Catalysis, Chalmers University of Technology, 412 96, Göteborg, Sweden

    Hannes Kannisto, Hanna Härelind Ingelsten & Magnus Skoglundh

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  1. Hannes Kannisto
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  2. Hanna Härelind Ingelsten
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  3. Magnus Skoglundh
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Correspondence to Hannes Kannisto.

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Kannisto, H., Ingelsten, H.H. & Skoglundh, M. Aspects of the Role of Hydrogen in H2-Assisted HC–SCR Over Ag–Al2O3 . Top Catal 52, 1817–1820 (2009). https://doi.org/10.1007/s11244-009-9359-1

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  • DOI: https://doi.org/10.1007/s11244-009-9359-1

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