Berlin 2018 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 65: Focus Session: Structure and Chemistry of Metal-Oxide Surfaces III

O 65.4: Vortrag

Mittwoch, 14. März 2018, 16:00–16:15, MA 005

On the role of strong metal-support interactions in the activity of Metal/CeO₂ catalysts — •M. Veronica Ganduglia-Pirovano¹ and Pablo G. Lustemberg² — ¹ICP-CSIC, Madrid, Spain — ²IFIR-CONICET-UNR, Rosario, Argentina

Ceria (CeO₂) is the most significant of the oxides of rare-earth elements in catalysis. Specifically, the role of ceria in the catalytic activity of metal-ceria systems is still not fully understood. The non-innocent role of ceria as catalyst support will be analyzed using ceria-supported metal nanoparticles as experimental and theoretical model catalysts [1-4]. Co-, Ni- and Cu-ceria systems will be used for methane dry reforming (CH₄+CO₂→ 2H₂+2CO), a relevant process from the environmental standpoint [1-3]. Ni-ceria will also be considered for hydrogen production [4]. The ability of ceria to stabilize oxidized species (Co²⁺ and Ni²⁺) on the stoichiometric CeO₂ surfaces, by relocalizing electrons on localized f-states, and metallic ones (Co⁰, Ni⁰) on the reduced CeO_2−x support, is essential for catalytic activity.
[1] Z. Liu et al., Angew. Chem. Int. Ed. 55, 7455 (2016).
[2] P. G. Lustemberg et al., ACS Catal. 6, 8184 (2016).
[3] Z. Liu et al., Angew. Chem. Int. Ed. 56, 13041 (2017).
[4] J. Carrasco et al., Angew. Chem. Int. Ed. 54, 3917 (2015).