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Title: Trends in Adsorption Energies of the Oxygenated Species on Single Platinum Atom Embedded in Carbon Nanotubes

Abstract

Herein we study the effect of strain on the catalytic activity of different Pt-doped single wall metallic carbon nanotubes (SWCNT) towards the oxygen reduction reaction (ORR). We consider the possibility of the Pt-doped at single vacancy inside the SWCNT to investigate the effect of confinement on the reaction mechanism. Density functional theory calculations indicate that for the SWCNTs with tube diameters below 7 Å, the strain energy varies significantly influencing the adsorption energies of the key intermediates of the ORR reaction. For the SWCNTs with tube diameters above 7 Å, on the other hand, both the calculated strain and the adsorption energies are almost constant. We furthermore find that the adsorption energies are strongly affected by confinement effects as shown for Pt-doped systems that are located inside the SWCNT. We show that the Pt-doped at single vacancy of the SWCNT strongly binds the oxygenated species under ORR potentials and therefore the active species is covered by oxo- or hydroxo group. Because the presence of Pt atoms doped at the single and double vacancies of the SWCNT is equivalently probable we also studied the Pt-doped at double vacancy. We find that the most active motif is the Pt-doped at double vacancymore » of SWCNT with 0.24V overpotenital.« less

Authors:
 [1];  [2];  [3];  [4]
  1. Stanford Univ., CA (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States); Henan Univ. of Science and Technology, Luoyang (China)
  3. Stanford Univ., CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States); Karlsruhe Inst. of Technology (KIT) (Germany)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1426443
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Catalysis Letters
Additional Journal Information:
Journal Volume: 147; Journal Issue: 11; Journal ID: ISSN 1011-372X
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Siahrostami, Samira, Li, Guo-Ling, Nørskov, Jens K., and Studt, Felix. Trends in Adsorption Energies of the Oxygenated Species on Single Platinum Atom Embedded in Carbon Nanotubes. United States: N. p., 2017. Web. doi:10.1007/s10562-017-2200-8.
Siahrostami, Samira, Li, Guo-Ling, Nørskov, Jens K., & Studt, Felix. Trends in Adsorption Energies of the Oxygenated Species on Single Platinum Atom Embedded in Carbon Nanotubes. United States. doi:10.1007/s10562-017-2200-8.
Siahrostami, Samira, Li, Guo-Ling, Nørskov, Jens K., and Studt, Felix. Sat . "Trends in Adsorption Energies of the Oxygenated Species on Single Platinum Atom Embedded in Carbon Nanotubes". United States. doi:10.1007/s10562-017-2200-8. https://www.osti.gov/servlets/purl/1426443.
@article{osti_1426443,
title = {Trends in Adsorption Energies of the Oxygenated Species on Single Platinum Atom Embedded in Carbon Nanotubes},
author = {Siahrostami, Samira and Li, Guo-Ling and Nørskov, Jens K. and Studt, Felix},
abstractNote = {Herein we study the effect of strain on the catalytic activity of different Pt-doped single wall metallic carbon nanotubes (SWCNT) towards the oxygen reduction reaction (ORR). We consider the possibility of the Pt-doped at single vacancy inside the SWCNT to investigate the effect of confinement on the reaction mechanism. Density functional theory calculations indicate that for the SWCNTs with tube diameters below 7 Å, the strain energy varies significantly influencing the adsorption energies of the key intermediates of the ORR reaction. For the SWCNTs with tube diameters above 7 Å, on the other hand, both the calculated strain and the adsorption energies are almost constant. We furthermore find that the adsorption energies are strongly affected by confinement effects as shown for Pt-doped systems that are located inside the SWCNT. We show that the Pt-doped at single vacancy of the SWCNT strongly binds the oxygenated species under ORR potentials and therefore the active species is covered by oxo- or hydroxo group. Because the presence of Pt atoms doped at the single and double vacancies of the SWCNT is equivalently probable we also studied the Pt-doped at double vacancy. We find that the most active motif is the Pt-doped at double vacancy of SWCNT with 0.24V overpotenital.},
doi = {10.1007/s10562-017-2200-8},
journal = {Catalysis Letters},
number = 11,
volume = 147,
place = {United States},
year = {Sat Sep 30 00:00:00 EDT 2017},
month = {Sat Sep 30 00:00:00 EDT 2017}
}

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Works referenced in this record:

Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set
journal, July 1996


Small but strong: A review of the mechanical properties of carbon nanotube–polymer composites
journal, August 2006


Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set
journal, October 1996


Advances in the science and technology of carbon nanotubes and their composites: a review
journal, October 2001

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