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Title: Correlating ethylene glycol reforming activity with in-situ EXAFS detection of Ni segregation in supported NiPt bimetallic catalysts

Abstract

The structural changes in supported NiPt/C and NiPt/γ-Al2O3 catalysts were investigated using in-situ extended X-ray absorption fine structure (EXAFS) under aqueous phase reforming (APR) of ethylene glycol conditions. Reverse Monte Carlo is introduced to analyze the EXAFS data. Parallel reactor studies of APR of ethylene glycol showed that NiPt catalysts were initially more active than monometallic Pt catalysts. The enhanced activity was correlated to changes in the catalyst structure. Under APR conditions, Ni segregated to the surface of the catalysts, resembling Ni-terminated bimetallic surfaces that were predicted to be more active than Pt from theoretical and experimental studies on model surfaces.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1054468
Report Number(s):
PNNL-SA-89894
46195; BM0101010
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
ACS Catalysis, 2(11):2290-2296
Additional Journal Information:
Journal Name: ACS Catalysis, 2(11):2290-2296
Country of Publication:
United States
Language:
English
Subject:
Environmental Molecular Sciences Laboratory

Citation Formats

Trupy, Sarah A., Karim, Ayman M., Bagia, Christtina, Deng, Weihua, Huang, Yulin, Vlachos, Dionisios G., and Chen, Jingguang. Correlating ethylene glycol reforming activity with in-situ EXAFS detection of Ni segregation in supported NiPt bimetallic catalysts. United States: N. p., 2012. Web. doi:10.1021/cs3004227.
Trupy, Sarah A., Karim, Ayman M., Bagia, Christtina, Deng, Weihua, Huang, Yulin, Vlachos, Dionisios G., & Chen, Jingguang. Correlating ethylene glycol reforming activity with in-situ EXAFS detection of Ni segregation in supported NiPt bimetallic catalysts. United States. doi:10.1021/cs3004227.
Trupy, Sarah A., Karim, Ayman M., Bagia, Christtina, Deng, Weihua, Huang, Yulin, Vlachos, Dionisios G., and Chen, Jingguang. Wed . "Correlating ethylene glycol reforming activity with in-situ EXAFS detection of Ni segregation in supported NiPt bimetallic catalysts". United States. doi:10.1021/cs3004227.
@article{osti_1054468,
title = {Correlating ethylene glycol reforming activity with in-situ EXAFS detection of Ni segregation in supported NiPt bimetallic catalysts},
author = {Trupy, Sarah A. and Karim, Ayman M. and Bagia, Christtina and Deng, Weihua and Huang, Yulin and Vlachos, Dionisios G. and Chen, Jingguang},
abstractNote = {The structural changes in supported NiPt/C and NiPt/γ-Al2O3 catalysts were investigated using in-situ extended X-ray absorption fine structure (EXAFS) under aqueous phase reforming (APR) of ethylene glycol conditions. Reverse Monte Carlo is introduced to analyze the EXAFS data. Parallel reactor studies of APR of ethylene glycol showed that NiPt catalysts were initially more active than monometallic Pt catalysts. The enhanced activity was correlated to changes in the catalyst structure. Under APR conditions, Ni segregated to the surface of the catalysts, resembling Ni-terminated bimetallic surfaces that were predicted to be more active than Pt from theoretical and experimental studies on model surfaces.},
doi = {10.1021/cs3004227},
journal = {ACS Catalysis, 2(11):2290-2296},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {10}
}