Surface Modifications during a Catalytic Reaction: A Combined APT and FIB/SEM Analysis of Surface Segregation

Barroo, Cedric; Janvelyan, Nare; Zugic, Branko; Magyar, Andrew P.; Akey, Austin J.; Biener, Juergen; Friend, Cynthia M.; Bell, David C.

doi:10.1017/S1431927616002634

Title: Surface Modifications during a Catalytic Reaction: A Combined APT and FIB/SEM Analysis of Surface Segregation

Abstract

To improve the understanding of catalytic processes, the surface structure and composition of the active materials need to be determined before and after reaction. Morphological changes may occur under reaction conditions and can dramatically influence the reactivity and/or selectivity of a catalyst. Goldbased catalysts with different architectures are currently being developed for selective oxidation reactions at low temperatures. Specifically, nanoporous Au (npAu) with a composition of Au₉₇-Ag₃ is obtained by dealloying a Ag₇₀-Au₃₀ bulk alloy. Recent studies highlight the efficiency of npAu catalysts for methanol oxidation using ozone to activate the catalysts before methanol oxidation. In this paper, we studied the morphological and compositional changes occurring at the surface of Au-based catalysts in certain conditions.

Authors:

Barroo, Cedric ^[1]; Janvelyan, Nare ^[1]; Zugic, Branko ^[1]; Magyar, Andrew P. ^[1]; Akey, Austin J. ^[1]; Biener, Juergen ^[2]; Friend, Cynthia M. ^[1]; Bell, David C. ^[1]

Harvard Univ., Cambridge, MA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Publication Date:: Mon Jul 25 00:00:00 EDT 2016

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1415560

Report Number(s):: LLNL-JRNL-738655
Journal ID: ISSN 1431-9276; applab; TRN: US1800837

Grant/Contract Number:: AC52-07NA27344

Resource Type:: Accepted Manuscript

Journal Name:: Microscopy and Microanalysis

Additional Journal Information:: Journal Volume: 22; Journal Issue: S3; Journal ID: ISSN 1431-9276

Publisher:: Microscopy Society of America (MSA)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY

Citation Formats


                    Barroo, Cedric, Janvelyan, Nare, Zugic, Branko, Magyar, Andrew P., Akey, Austin J., Biener, Juergen, Friend, Cynthia M., and Bell, David C. Surface Modifications during a Catalytic Reaction: A Combined APT and FIB/SEM Analysis of Surface Segregation.  United States: N. p., 2016. 
Web.  doi:10.1017/S1431927616002634.

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                    Barroo, Cedric, Janvelyan, Nare, Zugic, Branko, Magyar, Andrew P., Akey, Austin J., Biener, Juergen, Friend, Cynthia M., & Bell, David C. Surface Modifications during a Catalytic Reaction: A Combined APT and FIB/SEM Analysis of Surface Segregation.  United States.  https://doi.org/10.1017/S1431927616002634

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                    Barroo, Cedric, Janvelyan, Nare, Zugic, Branko, Magyar, Andrew P., Akey, Austin J., Biener, Juergen, Friend, Cynthia M., and Bell, David C. Mon .  
"Surface Modifications during a Catalytic Reaction: A Combined APT and FIB/SEM Analysis of Surface Segregation".  United States.  https://doi.org/10.1017/S1431927616002634.  https://www.osti.gov/servlets/purl/1415560.

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@article{osti_1415560,

  title        = {Surface Modifications during a Catalytic Reaction: A Combined APT and FIB/SEM Analysis of Surface Segregation},

  author       = {Barroo, Cedric and Janvelyan, Nare and Zugic, Branko and Magyar, Andrew P. and Akey, Austin J. and Biener, Juergen and Friend, Cynthia M. and Bell, David C.},

  abstractNote = {To improve the understanding of catalytic processes, the surface structure and composition of the active materials need to be determined before and after reaction. Morphological changes may occur under reaction conditions and can dramatically influence the reactivity and/or selectivity of a catalyst. Goldbased catalysts with different architectures are currently being developed for selective oxidation reactions at low temperatures. Specifically, nanoporous Au (npAu) with a composition of Au97-Ag3 is obtained by dealloying a Ag70-Au30 bulk alloy. Recent studies highlight the efficiency of npAu catalysts for methanol oxidation using ozone to activate the catalysts before methanol oxidation. In this paper, we studied the morphological and compositional changes occurring at the surface of Au-based catalysts in certain conditions.},

  doi          = {10.1017/S1431927616002634},

  journal      = {Microscopy and Microanalysis},

  number       = S3,

  volume       = 22,

  place        = {United States},

  year         = {Mon Jul 25 00:00:00 EDT 2016},

  month        = {Mon Jul 25 00:00:00 EDT 2016}

}

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Works referenced in this record:

Nanoporous Gold: Understanding the Origin of the Reactivity of a 21st Century Catalyst Made by Pre-Columbian Technology
journal, September 2015

Biener, Juergen; Biener, Monika M.; Madix, Robert J.
ACS Catalysis, Vol. 5, Issue 11
DOI: 10.1021/acscatal.5b01586

Works referencing / citing this record:

Atom Probe Tomography for Catalysis Applications: A Review
journal, July 2019

Barroo, Cédric; Akey, Austin J.; Bell, David C.
Applied Sciences, Vol. 9, Issue 13
DOI: 10.3390/app9132721

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Title: Surface Modifications during a Catalytic Reaction: A Combined APT and FIB/SEM Analysis of Surface Segregation

Abstract

Citation Formats

Nanoporous Gold: Understanding the Origin of the Reactivity of a 21st Century Catalyst Made by Pre-Columbian Technology journal, September 2015

Atom Probe Tomography for Catalysis Applications: A Review journal, July 2019

Nanoporous Gold: Understanding the Origin of the Reactivity of a 21st Century Catalyst Made by Pre-Columbian Technology
journal, September 2015

Atom Probe Tomography for Catalysis Applications: A Review
journal, July 2019