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

Abstract : 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.
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Submitted on : Tuesday, February 12, 2019 - 6:14:46 PM
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Haoran Yu, Elena Davydova, Uri Ash, Hamish Miller, Leonard Bonville, et al.. Palladium-ceria nanocatalyst for hydrogen oxidation in alkaline media: Optimization of the Pd–CeO2 interface. Nano Energy, Elsevier, 2019, 57, pp.820-826. ⟨10.1016/j.nanoen.2018.12.098⟩. ⟨hal-02003779⟩

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