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Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
Published on: April 27, 2018
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Polyethyleneimine-functionalized PdOs bimetallene for enhanced oxygen reduction.
Ziqiang Wang1, Shan Xu1, Min Li1
1State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China. hjw@zjut.edu.cn.
Chemical Communications (Cambridge, England)
|March 28, 2023
Summary
We developed a novel polyethyleneimine-functionalized palladium-osmium bimetallic (PdOs@PEI) catalyst for the alkaline oxygen reduction reaction (ORR). This catalyst shows enhanced activity, stability, and durability compared to commercial platinum/carbon (Pt/C).
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- The oxygen reduction reaction (ORR) is crucial for energy conversion devices.
- Developing efficient and durable electrocatalysts is essential for advancing ORR technologies.
- Platinum-based catalysts are effective but costly and face stability issues.
Purpose of the Study:
- To fabricate and characterize polyethyleneimine-functionalized PdOs bimetallic nanosheets (PdOs@PEI bimetallene) for alkaline ORR.
- To investigate the structural and electronic properties influencing ORR performance.
- To compare the catalytic activity and durability of PdOs@PEI bimetallene with commercial Pt/C.
Main Methods:
- Wet-chemical synthesis of PdOs@PEI bimetallene.
- Characterization of nanosheet structure, composition, and electronic properties.
- Electrochemical evaluation of ORR activity, stability, and durability in alkaline media.
Main Results:
- The synthesized PdOs@PEI bimetallene exhibits an ultra-thin, curved nanosheet structure.
- The bimetallic composition and PEI modification optimize electronic structure and oxygen adsorption.
- PdOs@PEI bimetallene demonstrates superior ORR activity, stability, and durability compared to commercial Pt/C.
Conclusions:
- Polyethyleneimine modification significantly enhances the ORR performance of PdOs bimetallene.
- The unique nanostructure and tailored electronic properties contribute to improved catalytic efficiency.
- PdOs@PEI bimetallene represents a promising alternative to Pt-based catalysts for alkaline ORR applications.
