Improvement of H$_2$O$_2$ electrogeneration using a Vulcan XC72 carbon-based electrocatalyst modified with Ce-doped Nb$_2$O$_5$
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866916752593518592 |
|---|---|
| author | Trench, Aline B. Moura, João Paulo C. Antonin, Vanessa S. Fernandes, Caio Machado Liu, Liying Santos, Mauro C. |
| author_facet | Trench, Aline B. Moura, João Paulo C. Antonin, Vanessa S. Fernandes, Caio Machado Liu, Liying Santos, Mauro C. |
| contents | The use of the oxygen reduction reaction (ORR) for in-situ production of H$_2$O$_2$ is an attractive alternative to replace the methods based on anthraquinone oxidation. This study investigates the modification of Vulcan XC72 carbon with Ce-doped Nb$_2$O$_5$ in different molar proportions and its application as electrocatalysts in the ORR. One performed the characterization of the electrocatalysts using X-ray diffraction, Raman spectroscopy, scanning electron microscopy, transmission electron microscopy, contact angle measurements, and X-ray photoelectron spectroscopy. Subsequently, the electrocatalysts were analyzed for the ORR and the Nb$_2$O$_5$ doped with 0.5% Ce showing the highest electrocatalytic response. This electrocatalyst was also employed as a gas diffusion electrode and exhibited more significant H$_2$O$_2$ production at all potentials than the Vulcan XC72 carbon modified solely with Nb$_2$O$_5$. At the applied potentials of -1.3 V and -1.9 V, it produced 105% and 86% more H$_2$O$_2$, respectively, than the Vulcan XC72 carbon modified only with Nb$_2$O$_5$. These results can be attributed to the doping of Nb$_2$O$_5$ with 0.5% Ce, which induces local distortions in the crystal lattice of Nb$_2$O$_5$ due to the difference in ionic radius between Nb$^{5+}$ and Ce$^{3+}$, which combined with increased hydrophilicity and wetting properties, may have facilitated electron transfer and O$_2$ transport, favoring the ORR. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_16871 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Improvement of H$_2$O$_2$ electrogeneration using a Vulcan XC72 carbon-based electrocatalyst modified with Ce-doped Nb$_2$O$_5$ Trench, Aline B. Moura, João Paulo C. Antonin, Vanessa S. Fernandes, Caio Machado Liu, Liying Santos, Mauro C. Materials Science Chemical Physics The use of the oxygen reduction reaction (ORR) for in-situ production of H$_2$O$_2$ is an attractive alternative to replace the methods based on anthraquinone oxidation. This study investigates the modification of Vulcan XC72 carbon with Ce-doped Nb$_2$O$_5$ in different molar proportions and its application as electrocatalysts in the ORR. One performed the characterization of the electrocatalysts using X-ray diffraction, Raman spectroscopy, scanning electron microscopy, transmission electron microscopy, contact angle measurements, and X-ray photoelectron spectroscopy. Subsequently, the electrocatalysts were analyzed for the ORR and the Nb$_2$O$_5$ doped with 0.5% Ce showing the highest electrocatalytic response. This electrocatalyst was also employed as a gas diffusion electrode and exhibited more significant H$_2$O$_2$ production at all potentials than the Vulcan XC72 carbon modified solely with Nb$_2$O$_5$. At the applied potentials of -1.3 V and -1.9 V, it produced 105% and 86% more H$_2$O$_2$, respectively, than the Vulcan XC72 carbon modified only with Nb$_2$O$_5$. These results can be attributed to the doping of Nb$_2$O$_5$ with 0.5% Ce, which induces local distortions in the crystal lattice of Nb$_2$O$_5$ due to the difference in ionic radius between Nb$^{5+}$ and Ce$^{3+}$, which combined with increased hydrophilicity and wetting properties, may have facilitated electron transfer and O$_2$ transport, favoring the ORR. |
| title | Improvement of H$_2$O$_2$ electrogeneration using a Vulcan XC72 carbon-based electrocatalyst modified with Ce-doped Nb$_2$O$_5$ |
| topic | Materials Science Chemical Physics |
| url | https://arxiv.org/abs/2505.16871 |