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Title: Improved oxygen reduction activity on Pt{sub 3}Ni(111) via increased surface site availability.

Abstract

The slow rate of the oxygen reduction reaction (ORR) in the polymer electrolyte membrane fuel cell (PEMFC) is the main limitation for automotive applications. We demonstrated that the Pt{sub 3}Ni(111) surface is 10-fold more active for the ORR than the corresponding Pt(111) surface and 90-fold more active than the current state-of-the-art Pt/C catalysts for PEMFC. The Pt{sub 3}Ni(111) surface has an unusual electronic structure (d-band center position) and arrangement of surface atoms in the near-surface region. Under operating conditions relevant to fuel cells, its near-surface layer exhibits a highly structured compositional oscillation in the outermost and third layers, which are Pt-rich, and in the second atomic layer, which is Ni-rich. The weak interaction between the Pt surface atoms and nonreactive oxygenated species increases the number of active sites for O{sub 2} adsorption.

Authors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); General Motors; Engineering and Physical Sciences Research Council (EPSRC)
OSTI Identifier:
948792
Report Number(s):
ANL/MSD/JA-58384
Journal ID: ISSN 0193-4511; SCEHDK; TRN: US200907%%247
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Science; Journal Volume: 315; Journal Issue: 2007
Country of Publication:
United States
Language:
ENGLISH
Subject:
30 DIRECT ENERGY CONVERSION; ADSORPTION; ATOMS; AVAILABILITY; CATALYSTS; ELECTROLYTES; ELECTRONIC STRUCTURE; FUEL CELLS; MEMBRANES; OSCILLATIONS; OXYGEN; POLYMERS; WEAK INTERACTIONS

Citation Formats

Stamenkovic, V. R., Fowler, B., Mun, B. S., Wang, G., Ross, P. N., Lucus, C. A., Markovic, N. M., Materials Science Division, LBNL, Univ. Liverpool, and Univ. of South Carolina. Improved oxygen reduction activity on Pt{sub 3}Ni(111) via increased surface site availability.. United States: N. p., 2007. Web. doi:10.1126/science.1135941.
Stamenkovic, V. R., Fowler, B., Mun, B. S., Wang, G., Ross, P. N., Lucus, C. A., Markovic, N. M., Materials Science Division, LBNL, Univ. Liverpool, & Univ. of South Carolina. Improved oxygen reduction activity on Pt{sub 3}Ni(111) via increased surface site availability.. United States. doi:10.1126/science.1135941.
Stamenkovic, V. R., Fowler, B., Mun, B. S., Wang, G., Ross, P. N., Lucus, C. A., Markovic, N. M., Materials Science Division, LBNL, Univ. Liverpool, and Univ. of South Carolina. Mon . "Improved oxygen reduction activity on Pt{sub 3}Ni(111) via increased surface site availability.". United States. doi:10.1126/science.1135941.
@article{osti_948792,
title = {Improved oxygen reduction activity on Pt{sub 3}Ni(111) via increased surface site availability.},
author = {Stamenkovic, V. R. and Fowler, B. and Mun, B. S. and Wang, G. and Ross, P. N. and Lucus, C. A. and Markovic, N. M. and Materials Science Division and LBNL and Univ. Liverpool and Univ. of South Carolina},
abstractNote = {The slow rate of the oxygen reduction reaction (ORR) in the polymer electrolyte membrane fuel cell (PEMFC) is the main limitation for automotive applications. We demonstrated that the Pt{sub 3}Ni(111) surface is 10-fold more active for the ORR than the corresponding Pt(111) surface and 90-fold more active than the current state-of-the-art Pt/C catalysts for PEMFC. The Pt{sub 3}Ni(111) surface has an unusual electronic structure (d-band center position) and arrangement of surface atoms in the near-surface region. Under operating conditions relevant to fuel cells, its near-surface layer exhibits a highly structured compositional oscillation in the outermost and third layers, which are Pt-rich, and in the second atomic layer, which is Ni-rich. The weak interaction between the Pt surface atoms and nonreactive oxygenated species increases the number of active sites for O{sub 2} adsorption.},
doi = {10.1126/science.1135941},
journal = {Science},
number = 2007,
volume = 315,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}