Palladium-ceria nanocatalyst for hydrogen oxidation in alkaline media: Optimization of the Pd–CeO2 interface

Haoran Yu , Elena Davydova , Uri Ash , Hamish R Miller (1) , Leonard Bonville , Dario G Dekel (2) , Radenka Maric

1 ICCOM - Istituto di Chimica dei Composti Organometallici
2 Technion - Israel Institute of Technology [Haifa]

The development of Pt-free catalyst for anion exchange membrane fuel cells is limited by the sluggish hydrogen oxidation reaction (HOR) at the anode. Previously, the use of CeO2 as a catalyst promoter facilitated drastic ennoblement of Pd for the HOR kinetics in base media. However, further optimization and understanding of the Pd-CeO2 interaction, surface properties, and its influence on HOR are still needed. In this work, three types of Pd-CeO2/C catalysts are synthesized by a flame-based process, where the Pd-CeO2 interface and HOR activity are improved as compared to catalysts prepared by wet-chemistry processes. The correlation between the Pd-CeO2 interaction and HOR activity is established through comparisons with the three types of Pd-CeO2/C synthesized catalysts using electrochemical techniques and X-ray photoelectron spectroscopy.

Mots clés: hydrogen oxidation reaction; anion exchange membrane fuel cell; palladium; ceria; reactive spray deposition technology

Domaines: Catalyse

Haoran Yu, Elena Davydova, Uri Ash, Hamish R Miller, Leonard Bonville, et al.. Palladium-ceria nanocatalyst for hydrogen oxidation in alkaline media: Optimization of the Pd–CeO2 interface. Nano Energy, 2019, 57, pp.820-826. ⟨10.1016/j.nanoen.2018.12.098⟩. ⟨hal-02003779⟩