skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Platinum Attachments on Iron Oxide Nanoparticle Surfaces

Abstract

Platinum nanoparticles supported on metal oxide surfaces have shown great potential as heterogeneous catalysts to accelerate electrochemical processes, such as the oxygen reduction reaction in fuel cells. Recently, the use of magnetic supports has become a promising research topic for easy separation and recovery of catalysts using magnets, such as Pt nanoparticles supported on iron oxide nanoparticles. The attachment of Pt on iron oxide nanoparticles is limited by the wetting ability of the Pt (metal) on ceramic surfaces. A study of Pt nanoparticle attachment on iron oxide nanoparticle surfaces in an organic solvent is reported, which addresses the factors that promote or inhibit such attachment. It was discovered that the Pt attachment strongly depends on the capping molecules of the iron oxide seeds and the reaction temperature. For example, the attachment of Pt nanoparticles on oleic acid coated iron oxide nanoparticles was very challenging, because of the strong binding between the carboxylic groups and iron oxide surfaces. In contrast, when nanoparticles are coated with oleic acid/tri-n-octylphosphine oxide or oleic acid/oleylamine, a significant increase in Pt attachment was observed. Electronic structure calculations were then applied to estimate the binding energies between the capping molecules and iron ions, and the modeling resultsmore » strongly support the experimental observations.« less

Authors:
; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1006299
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics, 107(9):09B311-1 through 09B311-3
Additional Journal Information:
Journal Volume: 107; Journal Issue: 9; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; CATALYSTS; CERAMICS; ELECTRONIC STRUCTURE; FUEL CELLS; IRON IONS; IRON OXIDES; MAGNETS; OLEIC ACID; ORGANIC SOLVENTS; OXIDES; OXYGEN; PLATINUM; SEEDS; SIMULATION; Environmental Molecular Sciences Laboratory

Citation Formats

Palchoudhury, Soubantika, Xu, Yaolin, An, Wei, Turner, C H, and Bao, Yuping. Platinum Attachments on Iron Oxide Nanoparticle Surfaces. United States: N. p., 2010. Web. doi:10.1063/1.3355899.
Palchoudhury, Soubantika, Xu, Yaolin, An, Wei, Turner, C H, & Bao, Yuping. Platinum Attachments on Iron Oxide Nanoparticle Surfaces. United States. https://doi.org/10.1063/1.3355899
Palchoudhury, Soubantika, Xu, Yaolin, An, Wei, Turner, C H, and Bao, Yuping. 2010. "Platinum Attachments on Iron Oxide Nanoparticle Surfaces". United States. https://doi.org/10.1063/1.3355899.
@article{osti_1006299,
title = {Platinum Attachments on Iron Oxide Nanoparticle Surfaces},
author = {Palchoudhury, Soubantika and Xu, Yaolin and An, Wei and Turner, C H and Bao, Yuping},
abstractNote = {Platinum nanoparticles supported on metal oxide surfaces have shown great potential as heterogeneous catalysts to accelerate electrochemical processes, such as the oxygen reduction reaction in fuel cells. Recently, the use of magnetic supports has become a promising research topic for easy separation and recovery of catalysts using magnets, such as Pt nanoparticles supported on iron oxide nanoparticles. The attachment of Pt on iron oxide nanoparticles is limited by the wetting ability of the Pt (metal) on ceramic surfaces. A study of Pt nanoparticle attachment on iron oxide nanoparticle surfaces in an organic solvent is reported, which addresses the factors that promote or inhibit such attachment. It was discovered that the Pt attachment strongly depends on the capping molecules of the iron oxide seeds and the reaction temperature. For example, the attachment of Pt nanoparticles on oleic acid coated iron oxide nanoparticles was very challenging, because of the strong binding between the carboxylic groups and iron oxide surfaces. In contrast, when nanoparticles are coated with oleic acid/tri-n-octylphosphine oxide or oleic acid/oleylamine, a significant increase in Pt attachment was observed. Electronic structure calculations were then applied to estimate the binding energies between the capping molecules and iron ions, and the modeling results strongly support the experimental observations.},
doi = {10.1063/1.3355899},
url = {https://www.osti.gov/biblio/1006299}, journal = {Journal of Applied Physics, 107(9):09B311-1 through 09B311-3},
issn = {0021-8979},
number = 9,
volume = 107,
place = {United States},
year = {Fri Apr 30 00:00:00 EDT 2010},
month = {Fri Apr 30 00:00:00 EDT 2010}
}