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Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
Published on: April 27, 2018
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Designing Robust Support for Pt Alloy Nanoframes with Durable Oxygen Reduction Reaction Activity
Zhifu Wu1,2, Dai Dang3, Xinlong Tian4
1School of Materials Science and Engineering , Baise University , Baise , Guangxi 533000 , China.
ACS Applied Materials & Interfaces
|February 9, 2019
Summary
New electrocatalysts using platinum-copper nanoframes and titanium nitride offer superior performance and durability for oxygen reduction reactions in fuel cells, addressing key energy challenges.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Polymer electrolyte membrane fuel cells (PEMFCs) are crucial for addressing environmental and energy concerns.
- Developing effective and durable electrocatalysts for the oxygen reduction reaction (ORR) remains a significant challenge.
Purpose of the Study:
- To design and implement a novel electrocatalyst system to replace traditional platinum-carbon (Pt/C) catalysts for ORR.
- To enhance the activity and stability of electrocatalysts for improved fuel cell performance.
Main Methods:
- Fabrication of highly open platinum-copper (Pt3Cu) nanoframes.
- Integration of one-dimensional, hollow titanium nitride (TiN) architectures as a support.
- Evaluation of ORR performance using electrochemical techniques.
Main Results:
- The novel electrocatalyst demonstrated significantly higher specific and mass activities (5.32 mA cm-2 and 2.43 A mgPt-1) compared to commercial Pt/C.
- Achieved 14.4 times higher specific activity and 11.6 times higher mass activity than commercial Pt/C.
- Exhibited superior stability with much slower performance degradation than benchmarked Pt3Cu/C.
Conclusions:
- The new Pt3Cu/TiN electrocatalyst system offers a strategic approach for designing highly effective and stable ORR catalysts.
- High charge transfer and synergistic effects between Pt and the TiN support contribute to enhanced ORR activity and durability.
- This advancement holds promise for improving the efficiency and longevity of polymer electrolyte membrane fuel cells.
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