<br/>The spatial distribution of Ce3+ and Ce4+ in each particle of Pt-Ce2Zr2Ox was successufully visualized by scanning nano-XAFS imaging at Ce LIII-edge. Oxygen diffusion inside Pt-Ce2Zr2Ox particles were clearly imaged during oxygen storage and release processes. Oxygen diffusion proceeded from the interface of Pt and Ce2Zr2Ox for oxygen release process, while oxygen storage proceeded independently to the Pt catalyst at the surface of Ce2Zr2Ox. The mode of oxygen diffusion and active parts in individual catalyst particles are discussed.

Nano-XAFS imaging of oxygen diffusion in Pt-Ce2Zr2Ox particles during oxygen storage/release

253rd National Meeting (2017)

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