Mass-selected nanoparticles of PtxY as model catalysts for oxygen electroreduction
Abstract
Low-temperature fuel cells are limited by the oxygen reduction reaction, and their widespread implementation in automotive vehicles is hindered by cost of platinum currently the best-known catalyst for reducing oxygen in terms of both activity and stability. One solution is to decrease the amount of platinum required, for example by alloying, but without detrimentally affecting its properties. The alloy PtxY is known to be active and stable, but its synthesis in nanoparticulate form has proved challenging, which limits its further study. Herein we demonstrate the synthesis, characterization and catalyst testing of model PtxY nanoparticles prepared through the gas-aggregation technique. The catalysts reported here are highly active, with a mass activity of up to 3.05 A mgPt-1 at 0.9 V versus a reversible hydrogen electrode. Using a variety of characterization techniques, we show that the enhanced activity of PtxY over platinum results exclusively from a compressive strain exerted on the platinum surface atoms by the alloy core.
- Authors:
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1255588
- DOE Contract Number:
- AC02-76SF00515
- Resource Type:
- Journal Article
- Journal Name:
- Nature Chemistry
- Additional Journal Information:
- Journal Volume: 6; Journal Issue: 8; Journal ID: ISSN 1755-4330
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 30 DIRECT ENERGY CONVERSION; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE
Citation Formats
Hernandez-Fernandez, Patricia, Masini, Federico, McCarthy, David N., Strebel, Christian E., Friebel, Daniel, Deiana, Davide, Malacrida, Paolo, Nierhoff, Anders, Bodin, Anders, Wise, Anna M., Nielsen, Jane H., Hansen, Thomas W., Nilsson, Anders, Stephens, Ifan E. L., and Chorkendorff, Ib. Mass-selected nanoparticles of PtxY as model catalysts for oxygen electroreduction. United States: N. p., 2014.
Web. doi:10.1038/nchem.2001.
Hernandez-Fernandez, Patricia, Masini, Federico, McCarthy, David N., Strebel, Christian E., Friebel, Daniel, Deiana, Davide, Malacrida, Paolo, Nierhoff, Anders, Bodin, Anders, Wise, Anna M., Nielsen, Jane H., Hansen, Thomas W., Nilsson, Anders, Stephens, Ifan E. L., & Chorkendorff, Ib. Mass-selected nanoparticles of PtxY as model catalysts for oxygen electroreduction. United States. https://doi.org/10.1038/nchem.2001
Hernandez-Fernandez, Patricia, Masini, Federico, McCarthy, David N., Strebel, Christian E., Friebel, Daniel, Deiana, Davide, Malacrida, Paolo, Nierhoff, Anders, Bodin, Anders, Wise, Anna M., Nielsen, Jane H., Hansen, Thomas W., Nilsson, Anders, Stephens, Ifan E. L., and Chorkendorff, Ib. 2014.
"Mass-selected nanoparticles of PtxY as model catalysts for oxygen electroreduction". United States. https://doi.org/10.1038/nchem.2001.
@article{osti_1255588,
title = {Mass-selected nanoparticles of PtxY as model catalysts for oxygen electroreduction},
author = {Hernandez-Fernandez, Patricia and Masini, Federico and McCarthy, David N. and Strebel, Christian E. and Friebel, Daniel and Deiana, Davide and Malacrida, Paolo and Nierhoff, Anders and Bodin, Anders and Wise, Anna M. and Nielsen, Jane H. and Hansen, Thomas W. and Nilsson, Anders and Stephens, Ifan E. L. and Chorkendorff, Ib},
abstractNote = {Low-temperature fuel cells are limited by the oxygen reduction reaction, and their widespread implementation in automotive vehicles is hindered by cost of platinum currently the best-known catalyst for reducing oxygen in terms of both activity and stability. One solution is to decrease the amount of platinum required, for example by alloying, but without detrimentally affecting its properties. The alloy PtxY is known to be active and stable, but its synthesis in nanoparticulate form has proved challenging, which limits its further study. Herein we demonstrate the synthesis, characterization and catalyst testing of model PtxY nanoparticles prepared through the gas-aggregation technique. The catalysts reported here are highly active, with a mass activity of up to 3.05 A mgPt-1 at 0.9 V versus a reversible hydrogen electrode. Using a variety of characterization techniques, we show that the enhanced activity of PtxY over platinum results exclusively from a compressive strain exerted on the platinum surface atoms by the alloy core.},
doi = {10.1038/nchem.2001},
url = {https://www.osti.gov/biblio/1255588},
journal = {Nature Chemistry},
issn = {1755-4330},
number = 8,
volume = 6,
place = {United States},
year = {Sun Jul 13 00:00:00 EDT 2014},
month = {Sun Jul 13 00:00:00 EDT 2014}
}