Morphology and Activity Tuning of Cu3Pt/C Ordered Intermetallic Nanoparticles by Selective Electrochemical Dealloying

Wang, Deli; Yu, Yingchao; Zhu, Jing; Liu, Sufen; Muller, David A.; Abruña, Héctor D.

doi:10.1021/nl504597j

Morphology and Activity Tuning of Cu₃Pt/C Ordered Intermetallic Nanoparticles by Selective Electrochemical Dealloying

Journal Article · Mon Jan 19 23:00:00 EST 2015 · Nano Letters

DOI:https://doi.org/10.1021/nl504597j· OSTI ID:1370435

Wang, Deli ^[1]; Yu, Yingchao ^[2]; Zhu, Jing ^[1]; Liu, Sufen ^[1]; Muller, David A. ^[2]; Abruña, Héctor D. ^[2]

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.

View Accepted Manuscript (DOE)

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) (SC-22); 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

OSTI ID:: 1370435

Journal Information:: Nano Letters, Journal Name: Nano Letters Journal Issue: 2 Vol. 15; ISSN 1530-6984

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Figures / Tables (8)

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Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
dealloying
electrocatalyst
fuel cells
metal nanoparticles
nanoparticles intermetallics
ordered intermetallic
oxygen reduction reaction
platinum
redox reactions