Mesoporous graphitic carbon nitride-supported binary MPt (M: Co, Ni, Cu) nanoalloys as electrocatalysts for borohydride oxidation and hydrogen evolution reaction

Oliveira, Raisa C. P.; Sevim Bayrak, Melike; Sljukic, Biljana; Sequeira, Cesar A. C.; Metin, Onder; Santos, Diogo M. F.

doi:10.1016/j.cattod.2019.09.006

Makale Tam Makale Uluslararası 2020

Mesoporous graphitic carbon nitride-supported binary MPt (M: Co, Ni, Cu) nanoalloys as electrocatalysts for borohydride oxidation and hydrogen evolution reaction

Raisa C. P. Oliveira, Melike Sevim Bayrak, Biljana Sljukic, Cesar A. C. Sequeira, Onder Metin, Diogo M. F. Santos

CATALYSIS TODAY Cilt 357 · ss. 291–301 · 01.11.2020

DOI ile aç

Özet

In this work, binary MPt (M = Co, Ni, Cu) nanoalloys and mesoporous carbon nitride (mpg-C3N4) as support material are prepared, and then gathered together by liquid phase self-assembly in order to produce MPt/mpg-C3N4 electrocatalysts. The yielded electrocatalysts are characterized by TEM, ICP-MS and XRD techniques in order to determine their morphology, composition and textural properties. Evaluation of MPt/mpg-C3N4 (<3 wt.% of Pt) electrocatalysts performance for hydrogen evolution reaction (HER) and borohydride oxidation reaction (BOR) is carried out. Pt/mpg-C3N4 is also studied to better understand the alloying effect on the electrocatalysts' performance, being concluded that it clearly increases the catalytic activity while decreasing the necessary Pt metal amount. For HER, CoPt/mpg-C3N4 was found to be the best catalyst, presenting a Tafel slope of 109 mV dec(-1) at 65 degrees C. Regarding BOR, CuPt/mpg-C3N4 demonstrated the best catalytic activity with average activation energy and reaction order with respect to BH4- of 29.4 kJ mol(-1) and 0.87, respectively.

Anahtar kelimeler

nanoparticles bimetallic nanoparticles Reduced graphene oxide EFFICIENT mesoporous graphitic carbon nitride hydrogen evolution reaction catalysts Nickel Borohydride oxidation reaction Platinum alloys TRANSITION-METAL-ALLOYS PEROXIDE FUEL-CELL ALKALINE-SOLUTIONS POTENTIODYNAMIC RESPONSE ELECTROCHEMICAL-BEHAVIOR

Atıf için künye

Oliveira, R. C. P., Sevim Bayrak, M., Sljukic, B., Sequeira, C. A. C., Metin, O., & Santos, D. M. F. (2020). Mesoporous graphitic carbon nitride-supported binary MPt (M: Co, Ni, Cu) nanoalloys as electrocatalysts for borohydride oxidation and hydrogen evolution reaction. CATALYSIS TODAY, 357, 291–301. https://doi.org/10.1016/j.cattod.2019.09.006

BibTeX

@article{oliveira2020-56557,
  author = {Oliveira, Raisa C. P. and Sevim Bayrak, Melike and Sljukic, Biljana and Sequeira, Cesar A. C. and Metin, Onder and Santos, Diogo M. F.},
  title = {Mesoporous graphitic carbon nitride-supported binary MPt (M: Co, Ni, Cu) nanoalloys as electrocatalysts for borohydride oxidation and hydrogen evolution reaction},
  journal = {CATALYSIS TODAY},
  year = {2020},
  volume = {357},
  pages = {291--301},
  issn = {0920-5861},
  doi = {10.1016/j.cattod.2019.09.006},
  url = {https://akademik.atauni.edu.tr/yayinlar/56557-mesoporous-graphitic-carbon-nitride-supported-binary-mpt-m-co-ni-cu-nanoalloys}
}