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Concave Platinum-Copper Octopod Nanoframes Bounded with Multiple High-Index Facets for Efficient Electrooxidation
Shuiping Luo1,2, Pei Kang Shen1,2
1School of Materials Science and Engineering, Sun Yat-sen University , Guangzhou 510275, P. R. China.
ACS Nano
|September 24, 2016
Summary
Researchers developed a simple method to create platinum-copper (Pt-Cu) nanoframes with high-index facets for efficient electrocatalysis. These novel Pt-Cu nanoframes show superior activity and stability for methanol oxidation compared to commercial catalysts.
Area of Science:
- Materials Science
- Nanotechnology
- Electrochemistry
Background:
- Multimetallic nanoframes with 3D catalytic surfaces are promising nanocatalysts.
- Economical and simple synthesis of nanoframes remains a challenge.
Purpose of the Study:
- To develop a facile one-pot synthesis for Pt-Cu nanoframes with high-index facets.
- To evaluate their performance as electrooxidation catalysts.
Main Methods:
- One-pot synthesis of concave PtCu2 octopod nanoframes (PtCu2 CONFs) and ultrathin PtCu octopod nanoframes (PtCu UONFs) by adjusting Pt and Cu precursor ratios.
- Characterization of nanostructures and evaluation of electrocatalytic performance for methanol oxidation.
Main Results:
- PtCu2 CONFs, featuring high-index facets like {553}, {331}, and {221}, demonstrated excellent electrocatalytic activity and CO tolerance.
- PtCu2 CONFs showed a 7-fold increase in activity and a 205 mV lower onset potential for methanol oxidation compared to commercial Pt/C.
- PtCu2 CONFs maintained activity and structural integrity under harsh conditions, unlike PtCu UONFs.
Conclusions:
- A facile synthesis strategy for Pt-Cu nanoframes with high-index facets was established.
- PtCu2 CONFs exhibit superior electrocatalytic performance and stability for methanol oxidation.
- This work offers insights for designing stable and active nanoframe catalysts.
