Generation of Nano-Catalyst Particles by Spinodal Nano-Decomposition in Perovskite

Hidetoshi Kizaki; Koichi Kusakabe; Soichiro Nogami; Hiroshi Katayama-Yoshida

doi:10.1143/APEX.1.104001

Generation of Nano-Catalyst Particles by Spinodal Nano-Decomposition in Perovskite

Materials Science 2015-05-13 v1

Authors: Hidetoshi Kizaki , Koichi Kusakabe , Soichiro Nogami , Hiroshi Katayama-Yoshida

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Abstract

A new mechanism of nano-catalyst generation based on the spinodal nano-decomposition in self-regenerating perovskite catalysts for automotive-emissions control is proposed. To demonstrate existence of the spinodal nano-decomposition in real perovskite catalysts, we performed first-principles calculations to evaluate the free energy of La(Fe $_{1-x}$ Pd $_x$ )O $_3$ and La(Fe $_{1-x}$ Rh $_x$ )O $_3$ . The result indicates appearance of a spinodal region in the phase diagram of each material. Formation of nano-catalyst particles in the perovskite host matrix is crucial for the self-regeneration of perovskite catalyst. Based on the spinodal nano-decomposition model, possible materials are designed for new three-way catalyst with no contents of precious metal.

Keywords

spinodal nano-decomposition nano-catalyst perovskite self-regeneration first-principles calculation three-way catalyst

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@article{arxiv.0809.4827,
  title  = {Generation of Nano-Catalyst Particles by Spinodal Nano-Decomposition in Perovskite},
  author = {Hidetoshi Kizaki and Koichi Kusakabe and Soichiro Nogami and Hiroshi Katayama-Yoshida},
  journal= {arXiv preprint arXiv:0809.4827},
  year   = {2015}
}

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10 pages, 4 figures

Generation of Nano-Catalyst Particles by Spinodal Nano-Decomposition in Perovskite

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