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PtIr nanowires for efficient electrochemical ammonia oxidation
Chun Song1, Jinjie Fang1, Chengjin Chen1
1State Key Lab of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China. zhuwei@mail.buct.edu.cn.
Chemical Communications (Cambridge, England)
|March 16, 2026
Summary
Platinum-iridium (PtIr) nanowires synthesized via wet chemistry show improved ammonia oxidation reaction performance. These nanowires exhibit 2.2 times higher mass activity than traditional platinum on carbon (Pt/C) catalysts.
Area of Science:
- Electrochemistry
- Materials Science
- Nanotechnology
Background:
- Ammonia oxidation reaction (AOR) is crucial for electrochemical energy conversion.
- Developing efficient electrocatalysts is key to advancing AOR performance.
- Platinum-based catalysts are widely studied but often require improvement for practical applications.
Purpose of the Study:
- To synthesize and characterize novel platinum-iridium (PtIr) nanowires.
- To evaluate the electrocatalytic activity of PtIr nanowires for the ammonia oxidation reaction.
- To compare the performance of PtIr nanowires with conventional platinum catalysts.
Main Methods:
- Wet chemistry synthesis of PtIr nanowires.
- Electrochemical characterization using cyclic voltammetry and chronoamperometry.
- Performance evaluation at a potential of 0.6 V.
Main Results:
- Successful synthesis of PtIr nanowires with enhanced morphology.
- Achieved a mass activity of 124 mA mg-1 for AOR at 0.6 V.
- Demonstrated 2.2 times higher mass activity compared to commercial Pt/C catalysts.
Conclusions:
- PtIr nanowires represent a promising advanced electrocatalyst for ammonia oxidation.
- Wet chemistry synthesis offers an effective route to high-performance PtIr catalysts.
- The enhanced performance highlights the potential of alloying and nanostructuring for electrocatalysis.
