Pt-Pd bimetallic nanoparticles were synthesized on TiO2 support on the planar substrate as well as on high surface area SiO2 gel by atomic layer deposition to identify the catalytic performance improvement after the formation of Pt-Pd bimetallic nanoparticles by surface analysis techniques. From X-ray absorption near edge spectra of Pt-Pd bimetallic nanoparticles, d-orbital hybridization between Pt 5d and Pd 4d was observed, which is responsible for charge transfer from Pt to Pd. Moreover, it was found from the in situ grazing incidence X-ray absorption spectroscopy study that Pt-Pd nanoparticles have a Pd shell/Pt core structure with CO adsorption. Resonant photoemission spectroscopy on Pt-Pd bimetallic nanoparticles showed that Pd resonant intensity is enhanced compared to that of Pd monometallic nanoparticles because of d-orbital hybridization and electronic states broadening of Pt and Pd compared monometallic catalysts, which results in catalytic performance improvement.
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14 January 2020
Research Article|
January 14 2020
Synergetic effect on catalytic activity and charge transfer in Pt-Pd bimetallic model catalysts prepared by atomic layer deposition
Special Collection:
Catalytic Properties of Model Supported Nanoparticles
Moon-Hyung Jang
;
Moon-Hyung Jang
1
Department of Chemical and Materials Engineering, University of Alabama in Huntsville
, Huntsville, Alabama 35899, USA
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Orhan Kizilkaya;
Orhan Kizilkaya
2
Center for Advanced Microstructures and Devices, Louisiana State University
, Baton Rouge, Louisiana 70806, USA
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A. Jeremy Kropf;
A. Jeremy Kropf
3
Chemical Sciences and Engineering Division, Argonne National Laboratory
, Lemont, Illinois 60439, USA
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Richard L. Kurtz;
Richard L. Kurtz
2
Center for Advanced Microstructures and Devices, Louisiana State University
, Baton Rouge, Louisiana 70806, USA
4
Department of Physics and Astronomy, Louisiana State University
, Baton Rouge, Louisiana 70806, USA
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Jeffrey W. Elam;
Jeffrey W. Elam
5
Applied Materials Division, Argonne National Laboratory
, Lemont, Illinois 60439, USA
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Yu Lei
Yu Lei
a)
1
Department of Chemical and Materials Engineering, University of Alabama in Huntsville
, Huntsville, Alabama 35899, USA
a)Author to whom correspondence should be addressed: yu.lei@uah.edu
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a)Author to whom correspondence should be addressed: yu.lei@uah.edu
Note: This paper is part of the JCP Special Topic Collection on Catalytic Properties of Model Supported Nanoparticles.
J. Chem. Phys. 152, 024710 (2020)
Article history
Received:
September 23 2019
Accepted:
December 09 2019
Citation
Moon-Hyung Jang, Orhan Kizilkaya, A. Jeremy Kropf, Richard L. Kurtz, Jeffrey W. Elam, Yu Lei; Synergetic effect on catalytic activity and charge transfer in Pt-Pd bimetallic model catalysts prepared by atomic layer deposition. J. Chem. Phys. 14 January 2020; 152 (2): 024710. https://doi.org/10.1063/1.5128740
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