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

Journal Article · · Nano Letters
DOI:https://doi.org/10.1021/nl504597j· OSTI ID:1370435
 [1];  [2];  [1];  [1];  [2];  [2]
  1. Huazhong Univ. of Science and Technology, Wuhan (China)
  2. 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
Citation Metrics:
Cited by: 114 works
Citation information provided by
Web of Science

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Alloy-composition-dependent oxygen reduction reaction activity and electrochemical stability of Pt-based bimetallic systems: a model electrocatalyst study of Pt/Pt x Ni 100−x (111) journal January 2018
Tungsten as “Adhesive” in Pt 2 CuW 0.25 Ternary Alloy for Highly Durable Oxygen Reduction Electrocatalysis journal December 2019
Evolution of Nanoporous Surface Layers on Gas-Atomized Ti60Cu39Au1 Powders during Dealloying journal July 2018
Random Alloyed versus Intermetallic Nanoparticles: A Comparison of Electrocatalytic Performance journal July 2018
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Activated Surface Charge-Reversal Manganese Oxide Nanocubes with High Surface-to-Volume Ratio for Accurate Magnetic Resonance Tumor Imaging journal June 2017
Pt–Cu based nanocrystals as promising catalysts for various electrocatalytic reactions journal January 2019
Platinum-Palladium Core-Shell Nanoflower Catalyst with Improved Activity and Excellent Durability for the Oxygen Reduction Reaction journal January 2018
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Atomically ordered non-precious Co3Ta intermetallic nanoparticles as high-performance catalysts for hydrazine electrooxidation journal October 2019
Structurally Ordered Low‐Pt Intermetallic Electrocatalysts toward Durably High Oxygen Reduction Reaction Activity journal July 2019
Enhanced electrocatalytic activities of three dimensional PtCu@Pt bimetallic alloy nanofoams for oxygen reduction reaction journal January 2016
Intermetallic Nanocrystals: Syntheses and Catalytic Applications journal February 2017
Crossed PtCoCu Alloy Nanocrystals with High-Index Facets as Highly Active Catalyst for Methanol Oxidation Reaction journal May 2018
Compact 3D Copper with Uniform Porous Structure Derived by Electrochemical Dealloying as Dendrite-Free Lithium Metal Anode Current Collector journal March 2018
Achievements, challenges and perspectives on cathode catalysts in proton exchange membrane fuel cells for transportation journal July 2019
One-step synthesis of Pt/a-CoOx core/shell nanocomposites journal November 2019
Thermodynamics of CuPt nanoalloys. text January 2018