Morphology and Activity Tuning of Cu3Pt/C Ordered Intermetallic Nanoparticles by Selective Electrochemical Dealloying
Abstract
Improving the catalytic activity of Pt-based bimetallic nanoparticles is a key challenge in the application of proton-exchange membrane fuel cells. Electrochemical dealloying represents a powerful approach for tuning the surface structure and morphology of these catalyst nanoparticles. We present a comprehensive study of using electrochemical dealloying methods to control the morphology of ordered Cu3Pt/C intermetallic nanoparticles, which could dramatically affect their electrocatalytic activity for the oxygen reduction reaction (ORR). Depending on the electrochemical dealloying conditions, the nanoparticles with Pt-rich core–shell or porous structures were formed. We further demonstrate that the core–shell and porous morphologies can be combined to achieve the highest ORR activity. Lastly, this strategy provides new guidelines for optimizing nanoparticles synthesis and improving electrocatalytic activity.
- Authors:
-
- Huazhong Univ. of Science and Technology, Wuhan (China)
- Cornell Univ., Ithaca, NY (United States)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Energy Materials Center at Cornell (EMC2)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation of China; Program for New Century Excellent Talents in Universities of China; Doctoral Fund of Ministry of Education of China
- OSTI Identifier:
- 1370435
- Grant/Contract Number:
- SC0001086; 21306060; NCET-13-0237; 20130142120039; 2013TS136; 2014YQ009
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nano Letters
- Additional Journal Information:
- Journal Volume: 15; Journal Issue: 2; Related Information: Emc2 partners with Cornell University (lead); Lawrence Berkeley National Laboratory; Journal ID: ISSN 1530-6984
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; dealloying; electrocatalyst; fuel cells; ordered intermetallic; oxygen reduction reaction; redox reactions; metal nanoparticles; platinum; nanoparticles intermetallics
Citation Formats
Wang, Deli, Yu, Yingchao, Zhu, Jing, Liu, Sufen, Muller, David A., and Abruña, Héctor D. Morphology and Activity Tuning of Cu3Pt/C Ordered Intermetallic Nanoparticles by Selective Electrochemical Dealloying. United States: N. p., 2015.
Web. doi:10.1021/nl504597j.
Wang, Deli, Yu, Yingchao, Zhu, Jing, Liu, Sufen, Muller, David A., & Abruña, Héctor D. Morphology and Activity Tuning of Cu3Pt/C Ordered Intermetallic Nanoparticles by Selective Electrochemical Dealloying. United States. https://doi.org/10.1021/nl504597j
Wang, Deli, Yu, Yingchao, Zhu, Jing, Liu, Sufen, Muller, David A., and Abruña, Héctor D. Tue .
"Morphology and Activity Tuning of Cu3Pt/C Ordered Intermetallic Nanoparticles by Selective Electrochemical Dealloying". United States. https://doi.org/10.1021/nl504597j. https://www.osti.gov/servlets/purl/1370435.
@article{osti_1370435,
title = {Morphology and Activity Tuning of Cu3Pt/C Ordered Intermetallic Nanoparticles by Selective Electrochemical Dealloying},
author = {Wang, Deli and Yu, Yingchao and Zhu, Jing and Liu, Sufen and Muller, David A. and Abruña, Héctor D.},
abstractNote = {Improving the catalytic activity of Pt-based bimetallic nanoparticles is a key challenge in the application of proton-exchange membrane fuel cells. Electrochemical dealloying represents a powerful approach for tuning the surface structure and morphology of these catalyst nanoparticles. We present a comprehensive study of using electrochemical dealloying methods to control the morphology of ordered Cu3Pt/C intermetallic nanoparticles, which could dramatically affect their electrocatalytic activity for the oxygen reduction reaction (ORR). Depending on the electrochemical dealloying conditions, the nanoparticles with Pt-rich core–shell or porous structures were formed. We further demonstrate that the core–shell and porous morphologies can be combined to achieve the highest ORR activity. Lastly, this strategy provides new guidelines for optimizing nanoparticles synthesis and improving electrocatalytic activity.},
doi = {10.1021/nl504597j},
journal = {Nano Letters},
number = 2,
volume = 15,
place = {United States},
year = {Tue Jan 20 00:00:00 EST 2015},
month = {Tue Jan 20 00:00:00 EST 2015}
}
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