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Ultrathin dendritic Pt3Cu triangular pyramid caps with enhanced electrocatalytic activity
Yun Kuang1, Zhao Cai, Ying Zhang
1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology , Beijing 100029, P. R. China.
ACS Applied Materials & Interfaces
|September 30, 2014
Summary
Novel dendritic platinum-copper (Pt3Cu) triangular pyramid caps were synthesized. These nanoalloys exhibit enhanced electrocatalytic activity and poison-tolerance for methanol and formic acid oxidation.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Developing efficient electrocatalysts is crucial for fuel cells.
- Platinum-based catalysts are effective but suffer from cost and poisoning.
- Nanostructured alloys offer potential for improved performance.
Purpose of the Study:
- To synthesize novel dendritic Pt3Cu triangular pyramid caps.
- To investigate their structure and properties.
- To evaluate their electrocatalytic performance for fuel oxidation.
Main Methods:
- Solvothermal coreduction method.
- Tuning reduction kinetics with iodide ions.
- Characterization using HRTEM and HAADF-STEM.
- Electrochemical testing for methanol and formic acid oxidation.
Main Results:
- Successfully synthesized 3D caved dendritic Pt3Cu triangular pyramid caps with ultrathin branches.
- Iodide ions facilitated the formation of the Pt3Cu alloy nanostructure.
- The nanoalloys demonstrated significantly improved electrocatalytic activity and poison-tolerance compared to commercial Pt/C.
- Attributed performance enhancement to unique porous structure, high surface area, and synergistic effects.
Conclusions:
- Dendritic Pt3Cu triangular pyramid caps are promising electrocatalysts.
- The synthesis method and structural features contribute to enhanced performance.
- These nanoalloys offer a potential alternative to conventional Pt/C catalysts for fuel oxidation.
