Multi-scale theoretical study of support effect on sintering dynamics of Pt

Ai Suzuki, Katsuyoshi Nakamura, Ryo Sato, Kotaro Okushi, Hideyuki Tsuboi, Nozomu Hatakeyama, Akira Endou, Hiromitsu Takaba, Momoji Kubo, Mark C. Williams, Akira Miyamoto

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The capability of theoretical durability studies to offer an efficient alternative methodology for predicting the potential performance of catalysts has improved in recent years. In this regard, multi-scale theoretical methods for predicting sintering behavior of Pt on various catalyst supports are being developed. Various types of Pt diffusions depending on support were confirmed by the micro-scale ultra accelerated quantum chemical molecular dynamics (UA-QCMD) method. Moreover, macro-scale sintering behavior of Pt/γ-Al2O3, Pt/ZrO2 and Pt/CeO2 catalysts were studied using a developed 3D sintering simulator. Experimental results were well reproduced. While Pt on γ-Al2O3 sintered significantly, Pt on ZrO2 sintered slightly and Pt on CeO2 demonstrated the highest stability against sintering.

Original languageEnglish
Pages (from-to)3049-3056
Number of pages8
JournalSurface Science
Volume603
Issue number20
DOIs
Publication statusPublished - 2009 Oct 15

Keywords

  • CeO
  • Diffusion
  • Pt
  • Sintering
  • ZrO
  • γ-AlO

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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    Suzuki, A., Nakamura, K., Sato, R., Okushi, K., Tsuboi, H., Hatakeyama, N., Endou, A., Takaba, H., Kubo, M., Williams, M. C., & Miyamoto, A. (2009). Multi-scale theoretical study of support effect on sintering dynamics of Pt. Surface Science, 603(20), 3049-3056. https://doi.org/10.1016/j.susc.2009.08.017