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Co-Zn-MOFs Derived N-Doped Carbon Nanotubes with Crystalline Co Nanoparticles Embedded as Effective Oxygen Electrocatalysts
| Content Provider | MDPI |
|---|---|
| Author | Zhang, Wendi Liu, Xiao Ming Shang, Hong Liu, Xuanhe |
| Copyright Year | 2021 |
| Description | The oxygen reduction reaction (ORR) is a crucial step in fuel cells and metal-air batteries. It is necessary to expand the range of efficient non-precious ORR electrocatalysts on account of the low abundance and high cost of Pt/C catalysts. Herein, we synthesized crystalline cobalt-embedded N-doped carbon nanotubes (Co@CNTs-T) via facile carbonization of Co/Zn metal-organic frameworks (MOFs) with dicyandiamide at different temperatures (t = 600, 700, 800, 900 °C). Co@CNTs- 800 possessed excellent ORR activities in alkaline electrolytes with a half wave potential of 0.846 V vs. RHE (Reversible Hydrogen Electrode), which was comparable to Pt/C. This three-dimensional network, formed by Co@CNTs-T, facilitated electron migration and ion diffusion during the ORR process. The carbon shell surrounding the Co nanoparticles resulted in Co@CNTs-800 being stable as an electrocatalyst. This work provides a new strategy to design efficient and low-cost oxygen catalysts. |
| Starting Page | 261 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano11020261 |
| Journal | Nanomaterials |
| Issue Number | 2 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-01-20 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Inorganic Chemistry Metal-organic Frameworks N-doped Carbon Oxygen Reduction Reaction |
| Content Type | Text |
| Resource Type | Article |
