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Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
Polyoxometalate-modified carbon nanotubes: new catalyst support for methanol electro-oxidation
Dawei Pan1, Jinhua Chen, Wenyan Tao
1State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and ChemicalEngineering, Hunan University, Changsha 410082, People's Republic of China. chenjinhua@hnu.cn
Langmuir : the ACS Journal of Surfaces and Colloids
|June 14, 2006
Summary
A novel catalyst support, polyoxometalate-modified carbon nanotubes, enhances electrocatalytic activity for methanol oxidation. This new material shows improved performance in direct methanol fuel cells.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Developing efficient electrocatalysts is crucial for direct methanol fuel cells.
- Carbon nanotubes offer unique electrical properties as catalyst supports.
- Polyoxometalates possess excellent redox and protonic conductivity.
Purpose of the Study:
- To introduce polyoxometalate-modified carbon nanotubes as a novel catalyst support.
- To investigate the electrocatalytic properties of platinum (Pt) and platinum-ruthenium (Pt-Ru) nanoparticles on this new support for methanol electro-oxidation.
- To compare the performance of modified electrodes with unmodified ones.
Main Methods:
- Chemisorption was used to create polyoxometalate-modified carbon nanotubes.
- Platinum (Pt) and Platinum-Ruthenium (Pt-Ru) nanoparticles were electrochemically deposited onto the modified carbon nanotubes.
- Electrocatalytic properties, including exchange current density, specific activity, and cycle stability, were evaluated for methanol electro-oxidation.
Main Results:
- Polyoxometalate-modified carbon nanotube electrodes exhibited 1.4 times higher exchange current density compared to unmodified electrodes.
- Specific activity was 1.5 times higher on the modified electrodes.
- Enhanced cycle stability was observed for Pt and Pt-Ru catalysts on the polyoxometalate-modified carbon nanotubes.
Conclusions:
- Polyoxometalate-modified carbon nanotubes serve as a promising new catalyst support.
- The unique properties of polyoxometalates and carbon nanotubes synergistically enhance electrocatalytic performance.
- This catalyst support demonstrates significant potential for application in direct methanol fuel cells.
