In Situ Observation of Rh-CaTiO3 Catalysts during Reduction and Oxidation Treatments by Transmission Electron Microscopy

被引：51

作者：

Dai, Sheng ^{[1
]}

Zhang, Shuyi ^{[1
,2
]}

Katz, Michael B. ^{[2
,3
]}

Graham, George W. ^{[1
,2
]}

Pan, Xiaoqing ^{[1
,4
]}

机构：

[1] Univ Calif Irvine, Dept Chem Engn & Mat Sci, Irvine, CA 92697 USA

[2] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

[3] NIST, Mat Sci & Engn Div, Gaithersburg, MD 20899 USA

[4] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

来源：

ACS CATALYSIS | 2017年 / 7卷 / 03期

基金：

美国国家科学基金会;

关键词：

catalyst self-regeneration; CaTiO3; Rh; in situ STEM; embedded nanoparticles; AUTOMOTIVE-EMISSIONS CONTROL; RH; PD;

D O I：

10.1021/acscatal.6b03604

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Scanning transmission electron microscopy of high-surface-area Rh-doped CaTiO3 powder, conducted near atmospheric pressure at elevated temperature (250-700 degrees C) by means of an electron-transparent gas cell with a sample heater, provides evidence for both cyclical precipitation dissolution of Rh nanoparticles in response to redox cycling of the ambient gas and sintering of the powder.

引用

页码：1579 / 1582

页数：4

共 11 条

[1] Novel MEMS-Based Gas-Cell/Heating Specimen Holder Provides Advanced Imaging Capabilities for In Situ Reaction Studies [J].

Allard, Lawrence F. ;

Overbury, Steven H. ;

Bigelow, Wilbur C. ;

Katz, Michael B. ;

Nackashi, David P. ;

Damiano, John .

MICROSCOPY AND MICROANALYSIS, 2012, 18 (04) :656-666

[2]

[Anonymous], UNPUB

[3]

Cai W., 2014, COMMUNICATION

[4] Reversible precipitation/dissolution of precious-metal clusters in perovskite-based catalyst materials: Bulk versus surface re-dispersion [J].

Katz, Michael B. ;

Zhang, Shuyi ;

Duan, Yingwen ;

Wang, Hongjie ;

Fang, Minghao ;

Zhang, Kui ;

Li, Baihai ;

Graham, George W. ;

Pan, Xiaoqing .

JOURNAL OF CATALYSIS, 2012, 293 :145-148

[5] Comparison of precious metal doped and impregnated perovskite oxides for TWC application [J].

Malamis, Sotirios A. ;

Harrington, Rachael J. ;

Katz, Michael B. ;

Koerschner, David S. ;

Zhang, Shuyi ;

Cheng, Yisun ;

Xu, Lifeng ;

Jen, Hung-Wen ;

McCabe, Robert W. ;

Graham, George W. ;

Pan, Xiaoqing .

CATALYSIS TODAY, 2015, 258 :535-542

[6] Self-regeneration of a Pd-perovskite catalyst for automotive emissions control [J].

Nishihata, Y ;

Mizuki, J ;

Akao, T ;

Tanaka, H ;

Uenishi, M ;

Kimura, M ;

Okamoto, T ;

Hamada, N .

NATURE, 2002, 418 (6894) :164-167

[7] Evidence and Model for Strain-Driven Release of Metal Nanocatalysts from Perovskites during Exsolution [J].

Oh, Tae-Sik ;

Rahani, Ehsan K. ;

Neagu, Dragos ;

Irvine, John T. S. ;

Shenoy, Vivek B. ;

Gorte, Raymond J. ;

Vohs, John M. .

JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2015, 6 (24) :5106-5110

[8] Intelligent catalyst having the self-regenerative function of Pd, Rh and Pt for automotive emissions control [J].

Tanaka, Hirohisa ;

Uenishi, Mari ;

Taniguchi, Masashi ;

Tan, Isao ;

Narita, Keiichi ;

Kimura, Mareo ;

Kaneko, Kimiyoshi ;

Nishihata, Yasuo ;

Mizuki, Jun'ichiro .

CATALYSIS TODAY, 2006, 117 (1-3) :321-328

[9] Self-regenerating Rh- and Pt-based perovskite catalysts for automotive-emissions control [J].

Tanaka, Hirohisa ;

Taniguchi, Masashi ;

Uenishi, Mari ;

Kajita, Nobuhiko ;

Tan, Isao ;

Nishihata, Yasuo ;

Mizuki, Jun'ichiro ;

Narita, Keiichi ;

Kimura, Mareo ;

Kaneko, Kimiyoshi .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2006, 45 (36) :5998-6002

[10] Revealing particle growth mechanisms by combining high-surface-area catalysts made with monodisperse particles and electron microscopy conducted at atmospheric pressure [J].

Zhang, Shuyi ;

Cargnello, Matteo ;

Cai, Wei ;

Murray, Christopher B. ;

Graham, George W. ;

Pan, Xiaoqing .

JOURNAL OF CATALYSIS, 2016, 337 :240-247

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