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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:
 [1];  [1];  [1];  [1];  [1];  [2];  [1];  [1]
  1. Harvard Univ., Cambridge, MA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
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.
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. doi:10.1017/S1431927616002634.
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. doi:10.1017/S1431927616002634. https://www.osti.gov/servlets/purl/1415560.
@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 = {2016},
month = {7}
}

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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


    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

    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