Morphology and Activity Tuning of Cu3Pt/C Ordered Intermetallic Nanoparticles by Selective Electrochemical Dealloying
- Huazhong Univ. of Science and Technology, Wuhan (China)
- Cornell Univ., Ithaca, NY (United States)
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.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Energy Materials Center at Cornell (EMC2)
- Sponsoring Organization:
- 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
- Grant/Contract Number:
- SC0001086; 21306060; NCET-13-0237; 20130142120039; 2013TS136; 2014YQ009
- OSTI ID:
- 1370435
- Journal Information:
- Nano Letters, Vol. 15, Issue 2; Related Information: Emc2 partners with Cornell University (lead); Lawrence Berkeley National Laboratory; ISSN 1530-6984
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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