Fabrication of multifaceted palladium nanoparticles supported on nitrogen-doped carbon dots for enhanced oxygen reduction and magnetic field response studies
Kakaei, Karim, Aykut, Yasemin, Bayrakceken, Ayse, Mahdavi, Mehdi
This study introduces a novel electrode material composed of nitrogen-doped carbon quantum dots (N-CQDs) decorated with palladium nanoparticles. The N-CQDs were synthesized using a pyrolysis like method involving glucose and urea and characterized using various techniques, including TEM, FTIR, Raman, SEM, EDS, XPS and XRD. The nitrogen content of the N-CQDs was found to be 20 % by elemental analysis. Multifaceted palladium nanoparticles were subsequently anchored onto the N-CQDs and utilized as a catalyst for enhanced oxygen reduction reaction (ORR) in an alkaline medium. A magneto-electrochemical system was established to comprehensively investigate the influence of magnetic fields on the electrocatalytic process. The results demonstrate that the electron transfer number remains relatively constant at approximately 4 for both magnetized and non-magnetized Pd/N-rCQDs while the tafel slope exchange from 36 mV/dec to 40 mV/ dec. However, the application of a magnetic field significantly improves the performance in both the mixed and diffusion regions of the ORR, with an enhancement of approximately 100 %. These findings highlight the potential of nitrogen-doped carbon quantum dots, metal nanoparticles and the synergistic effects of magnetic fields in optimizing electrocatalytic reactions.
- Journal
- INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
- Year
- 2025
- Volume
- 136
- Pages
- 252-260
- ISSN
- 0360-3199
- eISSN
- 1879-3487
- DOI
- 10.1016/j.ijhydene.2025.05.050
- WoS UID
- WOS:001490771800002