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Updated: May 28, 2026
On the Preparation and Testing of Fuel Cell Catalysts Using the Thin Film Rotating Disk Electrode Method
Published on: March 16, 2018
Self-regeneration of Pd-LaFeO3 catalysts: new insight from atomic-resolution electron microscopy
Michael B Katz1, George W Graham, Yingwen Duan
1Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States.
Abstract:
Aberration-corrected transmission electron microscopy was used to study atomic-scale processes in Pd-LaFeO(3) catalysts. Clear evidence for diffusion of Pd into LaFeO(3) and out of LaFe(0.95)Pd(0.05)O(3-δ) under high-temperature oxidizing and reducing conditions, respectively, was found, but the extent to which these processes occurred was quite limited. These observations cast doubt that such phenomena play a significant role in a postulated mechanism of self-regeneration of this system as an automotive exhaust-gas catalyst.
