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arXiv · 0809.4827

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

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.

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Hidetoshi Kizaki, Koichi Kusakabe, Soichiro Nogami, Hiroshi Katayama-Yoshida. 2008-09-28. Generation of Nano-Catalyst Particles by Spinodal Nano-Decomposition in Perovskite. https://doi.org/10.1143/apex.1.104001

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