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Growing Tungsten Nanophases on Carbon Spheres Doped with Nitrogen. Behaviour as Electro-Catalysts for Oxygen Reduction Reaction
| Content Provider | MDPI |
|---|---|
| Author | Jesica, Castelo-Quibén Esther, Bailón-García Francisco, Carrasco-Marín Agust, ín F. Pérez-Cadenas Briz-Amate, Teresa Abdelwahab, Abdalla |
| Copyright Year | 2021 |
| Description | This work shows the preparation of carbon nanospheres with a high superficial nitrogen content (7 wt.%), obtained by a simple hydrothermal method, from pyrocatechol and formaldehyde, around which tungsten nanophases have been formed. One of these nanophases is tungsten carbide, whose electro-catalytic behavior in the ORR has been evaluated together with the presence of nitrogen surface groups. Both current and potential kinetic density values improve considerably with the presence of tungsten, despite the significant nitrogen loss detected during the carbonization treatment. However, the synergetic effect that the WC has with other electro-catalytic metals in this reaction cannot be easily evaluated with the nitrogen in these materials, since both contents vary in opposite ways. Nevertheless, all the prepared materials carried out oxygen electro-reduction by a mixed pathway of two and four electrons, showing remarkable electro-catalytic behavior. |
| Starting Page | 7716 |
| e-ISSN | 19961944 |
| DOI | 10.3390/ma14247716 |
| Journal | Materials |
| Issue Number | 24 |
| Volume Number | 14 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-12-14 |
| Access Restriction | Open |
| Subject Keyword | Materials Anesthesiology Carbon Nanospheres Tungsten Carbide Carbon–tungsten Composites Nitrogen-doped Electro-catalysts Oxygen Reduction Reaction |
| Content Type | Text |
| Resource Type | Article |
