Boosting oxygen electrode kinetics by addition of cost-effective transition metals (Ni, Fe, Cu) to platinum on graphene nanoplatelets

Mladenović, Dušan; Daş, Elif; Santos, Diogo M.F.; Bayrakçeken, Ayşe; Miljanić, Šćepan; Šljukić, Biljana

doi:10.1016/j.jallcom.2022.164156

Makale Tam Makale Uluslararası 2022

Boosting oxygen electrode kinetics by addition of cost-effective transition metals (Ni, Fe, Cu) to platinum on graphene nanoplatelets

Dušan Mladenović, Elif Daş, Diogo M.F. Santos, Ayşe Bayrakçeken, Šćepan Miljanić, Biljana Šljukić

JOURNAL OF ALLOYS AND COMPOUNDS Cilt 905 · 01.06.2022

DOI ile aç

Özet

Pt and Pt-M (M = Ni, Fe, Cu) nanoparticles supported on graphene nanoplatelets (GNPs) were synthesized

by simultaneous supercritical carbon dioxide deposition method. Morphology analysis by TEM revealed the

formation of metal nanoparticles of 2–3 nm size uniformly distributed over GNPs, while XPS was used to

determine their oxidation states. Four materials were tested as electrocatalysts for ORR and OER in unitized

regenerative fuel cells and rechargeable metal-air batteries. PtFe/GNPs exhibited favorable ORR kinetics in

terms of the highest diffusion-limited current density, the lowest Tafel slope, and a high number of ex-

changed electrons (n = 3.66), which might be attributed to its high double-layer capacitance and, thus, high

electrochemically active surface area. Furthermore, this material performance was comparable to that of

commercial Pt/C electrocatalyst containing double the amount of Pt. The same material showed the best

performance toward OER as evidenced by the highest current density, the lowest value of exchange current

density, and overpotential to reach a current density of 10 mA cm-2, as well as the lowest Tafel slope.

Atıf için künye

Mladenović, D., Daş, E., Santos, D. M., Bayrakçeken, A., Miljanić, Š., & Šljukić, B. (2022). Boosting oxygen electrode kinetics by addition of cost-effective transition metals (Ni, Fe, Cu) to platinum on graphene nanoplatelets. JOURNAL OF ALLOYS AND COMPOUNDS, 905. https://doi.org/10.1016/j.jallcom.2022.164156

BibTeX

@article{mladenovic2022-187521,
  author = {Mladenović, Dušan and Daş, Elif and Santos, Diogo M.F. and Bayrakçeken, Ayşe and Miljanić, Šćepan and Šljukić, Biljana},
  title = {Boosting oxygen electrode kinetics by addition of cost-effective transition metals (Ni, Fe, Cu) to platinum on graphene nanoplatelets},
  journal = {JOURNAL OF ALLOYS AND COMPOUNDS},
  year = {2022},
  volume = {905},
  issn = {0925-8388},
  doi = {10.1016/j.jallcom.2022.164156},
  url = {https://akademik.atauni.edu.tr/yayinlar/187521-boosting-oxygen-electrode-kinetics-by-addition-of-cost-effective-transition}
}