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Title: Recent Advances in Pt Monolayer Electrocatalysts for Oxygen Reduction Reaction: Scale-up Synthesis, Structure, and Activity of Pt Shells on Pd Cores

Abstract

We have established a scale-up synthesis method to produce gram-quantities of Pt monolayer electrocatalysts. The core-shell structure of the Pt/Pd/C electrocatalyst has been verified using the HAADF-STEM Z-contrast images, STEM/EELS, and STEM/EDS line profile analysis. The atomic structure of this electrocatalyst and formation of a Pt monolayer on Pd nanoparticle surfaces were examined using in situ EXAFS. The Pt mass activity of the Pt/Pd/C electrocatalyst for ORR is considerably higher than that of commercial Pt/C electrocatalysts. The results with Pt monolayer electrocatalysts may significantly impact science of electrocatalysis and fuel-cell technology, as they have demonstrated an exceptionally effective way of using Pt that can resolve problems of other approaches, including electrocatalysts inadequate activity and high Pt content.

Authors:
 [1];  [1];  [2];  [3];  [4];  [5];  [1]
  1. Brookhaven National Laboratory (BNL)
  2. Toyota Motor Corp.
  3. University of Delaware
  4. ORNL
  5. Hitachi High Technologies America
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Shared Research Equipment Collaborative Research Center
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
989151
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Electrochimica Acta
Additional Journal Information:
Journal Volume: 55; Journal Issue: 8; Journal ID: ISSN 0013-4686
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; ELECTROCATALYSTS; FUEL CELLS; OXYGEN; PLATINUM; SYNTHESIS

Citation Formats

Sasaki, K., Wang, J. X., Naohara, H., Marinkovic, N., More, Karren Leslie, Inada, H., and Adzic, R. R. Recent Advances in Pt Monolayer Electrocatalysts for Oxygen Reduction Reaction: Scale-up Synthesis, Structure, and Activity of Pt Shells on Pd Cores. United States: N. p., 2010. Web. doi:10.1016/j.electacta.2009.11.106.
Sasaki, K., Wang, J. X., Naohara, H., Marinkovic, N., More, Karren Leslie, Inada, H., & Adzic, R. R. Recent Advances in Pt Monolayer Electrocatalysts for Oxygen Reduction Reaction: Scale-up Synthesis, Structure, and Activity of Pt Shells on Pd Cores. United States. doi:10.1016/j.electacta.2009.11.106.
Sasaki, K., Wang, J. X., Naohara, H., Marinkovic, N., More, Karren Leslie, Inada, H., and Adzic, R. R. Fri . "Recent Advances in Pt Monolayer Electrocatalysts for Oxygen Reduction Reaction: Scale-up Synthesis, Structure, and Activity of Pt Shells on Pd Cores". United States. doi:10.1016/j.electacta.2009.11.106.
@article{osti_989151,
title = {Recent Advances in Pt Monolayer Electrocatalysts for Oxygen Reduction Reaction: Scale-up Synthesis, Structure, and Activity of Pt Shells on Pd Cores},
author = {Sasaki, K. and Wang, J. X. and Naohara, H. and Marinkovic, N. and More, Karren Leslie and Inada, H. and Adzic, R. R.},
abstractNote = {We have established a scale-up synthesis method to produce gram-quantities of Pt monolayer electrocatalysts. The core-shell structure of the Pt/Pd/C electrocatalyst has been verified using the HAADF-STEM Z-contrast images, STEM/EELS, and STEM/EDS line profile analysis. The atomic structure of this electrocatalyst and formation of a Pt monolayer on Pd nanoparticle surfaces were examined using in situ EXAFS. The Pt mass activity of the Pt/Pd/C electrocatalyst for ORR is considerably higher than that of commercial Pt/C electrocatalysts. The results with Pt monolayer electrocatalysts may significantly impact science of electrocatalysis and fuel-cell technology, as they have demonstrated an exceptionally effective way of using Pt that can resolve problems of other approaches, including electrocatalysts inadequate activity and high Pt content.},
doi = {10.1016/j.electacta.2009.11.106},
journal = {Electrochimica Acta},
issn = {0013-4686},
number = 8,
volume = 55,
place = {United States},
year = {2010},
month = {1}
}