Skip to main content
×
Home
    • Aa
    • Aa
  • Get access
    Check if you have access via personal or institutional login
  • Cited by 13
  • Cited by
    This article has been cited by the following publications. This list is generated based on data provided by CrossRef.

    Kotolevich, Yulia Kolobova, Ekaterina Khramov, Evgeniy Cabrera Ortega, Jesús Farías, Mario Zubavichus, Yan Zanella, Rodolfo Mota-Morales, Josué Pestryakov, Alexey Bogdanchikova, Nina and Cortés Corberán, Vicente 2016. Identification of Subnanometric Ag Species, Their Interaction with Supports and Role in Catalytic CO Oxidation. Molecules, Vol. 21, Issue. 4, p. 532.


    Baishya, Subhi and Deka, Ramesh Ch. 2015. Activity of faujasite supported gold monomer towards water gas shift reaction: hybrid density functional theory/molecular mechanics approach. RSC Adv., Vol. 5, Issue. 96, p. 78864.


    Guan, Yejun Song, Weiyu and Hensen, Emiel J.M. 2015. Catalysis by Materials with Well-Defined Structures.


    Sohlberg, Karl Pennycook, Timothy J. Zhou, Wu and Pennycook, Stephen J. 2015. Insights into the physical chemistry of materials from advances in HAADF-STEM. Phys. Chem. Chem. Phys., Vol. 17, Issue. 6, p. 3982.


    Howe, Jane Y Allard, Lawrence F Bigelow, Wilbur C Demers, Hendrix and Overbury, Steven H 2014. Understanding catalyst behavior during in situ heating through simultaneous secondary and transmitted electron imaging. Nanoscale Research Letters, Vol. 9, Issue. 1, p. 614.


    Lu, Ping Chandross, Michael Boyle, Timothy J. Clark, Blythe G. and Vianco, Paul 2014. Equilibrium Cu-Ag nanoalloy structure formation revealed by in situ scanning transmission electron microscopy heating experiments. APL MATERIALS, Vol. 2, Issue. 2, p. 022107.


    Song, Weiyu and Hensen, Emiel J. M. 2014. Mechanistic Aspects of the Water–Gas Shift Reaction on Isolated and Clustered Au Atoms on CeO2(110): A Density Functional Theory Study. ACS Catalysis, Vol. 4, Issue. 6, p. 1885.


    Goergen, S. Yin, C. Yang, M. Lee, B. Lee, S. Wang, C. Wu, P. Boucher, M. B. Kwon, G. Seifert, S. Winans, R. E. Vajda, S. and Flytzani-Stephanopoulos, M. 2013. Structure Sensitivity of Oxidative Dehydrogenation of Cyclohexane over FeOxand Au/Fe3O4Nanocrystals. ACS Catalysis, Vol. 3, Issue. 4, p. 529.


    Yang, Ming Allard, Lawrence F. and Flytzani-Stephanopoulos, Maria 2013. Atomically Dispersed Au–(OH)xSpecies Bound on Titania Catalyze the Low-Temperature Water-Gas Shift Reaction. Journal of the American Chemical Society, Vol. 135, Issue. 10, p. 3768.


    Flytzani-Stephanopoulos, Maria and Gates, Bruce C. 2012. Atomically Dispersed Supported Metal Catalysts. Annual Review of Chemical and Biomolecular Engineering, Vol. 3, Issue. 1, p. 545.


    Slanac, Daniel A. Li, Lin Mayoral, Alvaro Yacaman, Miguel José Manthiram, Arumugam Stevenson, Keith J. and Johnston, Keith P. 2012. Atomic resolution structural insights into PdPt nanoparticle–carbon interactions for the design of highly active and stable electrocatalysts. Electrochimica Acta, Vol. 64, p. 35.


    Takei, Takashi Akita, Tomoki Nakamura, Isao Fujitani, Tadahiro Okumura, Mitsutaka Okazaki, Kazuyuki Huang, Jiahui Ishida, Tamao and Haruta, Masatake 2012.


    Ma, Zhen and Dai, Sheng 2011. Design of Novel Structured Gold Nanocatalysts. ACS Catalysis, Vol. 1, Issue. 7, p. 805.


    ×

Behavior of Au Species in Au/Fe2O3 Catalysts Characterized by Novel In Situ Heating Techniques and Aberration-Corrected STEM Imaging

  • Lawrence F. Allard (a1), Maria Flytzani-Stephanopoulos (a2) and Steven H. Overbury (a1)
  • DOI: http://dx.doi.org/10.1017/S1431927610013486
  • Published online: 01 June 2010
Abstract
Abstract

The recent advent of a novel design of in situ heating technology for electron microscopes has permitted unprecedented control of elevated temperature studies of catalytic materials, particularly when coupled with the sub-Ångström imaging performance of a modern aberration-corrected scanning transmission electron microscope (STEM). Using micro-electro-mechanical-systems (MEMS)-based Aduro™ heating chips from Protochips, Inc. (Raleigh, NC, USA) allows nearly instantaneous heating and cooling of catalyst powders, avoiding effects of temperature ramping as experienced with standard heating stages. The heating technology also provides stable operation limited only by the inherent drift in the microscope stage, thus allowing full image resolution to be achieved even at elevated temperatures. The present study details the use of both the high X-Y spatial resolution in both dark-field and simultaneous bright-field imaging, along with the high resolution in Z (depth sectioning) provided by the large probe incidence semiangle in the aberration-corrected instrument, to characterize the evolution of microstructure in a commercial Au/Fe2O3 water-gas shift catalyst during elevated temperature treatment. The phenomenon of Au diffusion to the surface of hematite support particles to form discrete crystalline Au nanoparticles in the 1–2 nm size range, after a prior leaching treatment to remove surface Au species has been characterized.

Copyright
Corresponding author
Corresponding author. E-mail: allardLFjr@ornl.gov
Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

L.F. Allard , W.C. Bigelow , M. Jose-Yacaman , D.P. Nackashi , J. Damiano & S.E. Mick (2009a). A new MEMS-based system for ultra-high-resolution imaging at elevated temperatures. Microsc Res Technique 72(3), 208215.

L.F. Allard , A. Borisevich , W. Deng , R. Si , M. Flytzani-Stephanopoulos & S.H. Overbury (2009b). Evolution of gold structure during thermal treatment of Au/FeOx catalysts revealed by aberration-corrected electron microscopy. J Electron Microsc (Tokyo) 58(3), 199212.

A.Y. Borisevich , A.R. Lupini & S.J. Pennycook (2006a). Depth sectioning with the aberration-corrected scanning transmission electron microscope. Proceeding of the National Academy of Sciences 103(9), 30443048.

A.Y. Borisevich , A.R. Lupini , S. Travaglini & S.J. Pennycook (2006b). Depth sectioning of aligned crystals with the aberration-corrected scanning transmission electron microscope. J Electron Microsc (Tokyo) 55(1), 712.

P. Buffat & J.-P. Borel (1976). Size effect on the melting temperature of gold particles. Phys Rev A 13(6), 22872298.

N. De Jonge , R. Sougrat , B.M. Northan & S.J. Pennycook (2010). Three-dimensional scanning transmission electron microscopy of biological specimens. Microsc Microanal 16, 5362.

W. Deng , C. Carpenter , N. Yi & M. Flytzani-Stephanopoulos (2007). Comparison of the activity of Au/CeO2 and Au/Fe2O3 catalysts for the CO oxidation and the water-gas shift reactions. Topics in Catalysis 44(1–2), 199208.

J.Y. Howe , L.F. Allard , W.C. Bigelow & S.H. Overbury (2010). Synergy of combined (S)TEM imaging techniques for the characterization of catalyst behavior during in-situ heating. Microsc Microanal 16(S2), 312313.

S.N. Rashkeev , A.R. Lupini , S.H. Overbury , S.J. Pennycook & S.T. Pantelides (2007). Role of the nanoscale in catalytic CO oxidation by supported Au and Pt nanostructures. Phys Rev B 76, 035438035443.

J. Sun (2002). A model for shrinkage of a spherical void in the center of a grain: Influence of lattice diffusion. J Mater Eng Perf 11(3), 322330.

Y. Takahashi , F. Ueno & K. Nishiguchi (1988). A numerical analysis of the void-shrinkage process controlled by surface diffusion. Acta Metall 36(11), 30073018.

K. van Benthem , A.R. Lupini , M. Kim , H.S. Baik , S.J. Doh , J.H. Lee , M.P. Oxley , S.D. Findlay , L.J. Allen & S.J. Pennycook (2005). Three-dimensional imaging of individual hafnium atoms inside a semiconductor device. Appl Phys Lett 87, 034104-1034104-3.

H. Wang & Z. Li (2004). The three-dimensional analysis for diffusive shrinkage of a grain-boundary void in stressed solid. J Mater Sci 39, 34253432.

X. Xin , V. Intaraprasonk & D.A. Muller (2008). Depth sectioning of individual dopant atoms with aberration-corrected scanning transmission electron microscopy. Appl Phys Lett 92(1), 013125.

X.L. Xin & D.A. Muller (2009). Aberration-corrected ADF-STEM depth sectioning and prospects for reliable 3D imaging in S/TEM. J Elect Microsc (Tokyo) 58(3), 157165.

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Microscopy and Microanalysis
  • ISSN: 1431-9276
  • EISSN: 1435-8115
  • URL: /core/journals/microscopy-and-microanalysis
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords: