Detail publikace

Electrochemical top-down synthesis of C-supported Pt nano-particles with controllable shape and size: Mechanistic insights and application

Garlyyev, B. Watzele, S. Fichtner, J. Michalicka, J. Schokel, A. Senyshyn, A. Perego, A. Pan, DJ. El-Sayed, HA. Macak, JM. Atanassov, P. Zenyuk, IV. Bandarenka, AS.

Originální název

Electrochemical top-down synthesis of C-supported Pt nano-particles with controllable shape and size: Mechanistic insights and application

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

In this work, we demonstrate the power of a simple top-down electrochemical erosion approach to obtain Pt nanoparticle with controlled shapes and sizes (in the range from similar to 2 to similar to 10 nm). Carbon supported nanoparticles with narrow size distributions have been synthesized by applying an alternating voltage to macroscopic bulk platinum structures, such as disks or wires. Without using any surfactants, the size and shape of the particles can be changed by adjusting simple parameters such as the applied potential, frequency and electrolyte composition. For instance, application of a sinusoidal AC voltage with lower frequencies results in cubic nanoparticles; whereas higher frequencies lead to predominantly spherical nanoparticles. On the other hand, the amplitude of the sinusoidal signal was found to affect the particle size; the lower the amplitude of the applied AC signal, the smaller the resulting particle size. Pt/C catalysts prepared by this approach showed 0.76 A/mg mass activity towards the oxygen reduction reaction which is similar to 2 times higher than the state-of-the-art commercial Pt/C catalyst (0.42 A/mg) from Tanaka. In addition to this, we discussed the mechanistic insights about the nanoparticle formation pathways.

Klíčová slova

electrochemical synthesis; platinum; nanoparticles; oxygen reduction reaction

Autoři

Garlyyev, B.; Watzele, S. ; Fichtner, J.; Michalicka, J.; Schokel, A.; Senyshyn, A.; Perego, A.; Pan, DJ.; El-Sayed, HA.; Macak, JM.; Atanassov, P.; Zenyuk, IV.; Bandarenka, AS.

Vydáno

1. 8. 2021

Nakladatel

TSINGHUA UNIV PRESS

Místo

BEIJING

ISSN

1998-0000

Periodikum

Nano Research

Ročník

14

Číslo

8

Stát

Čínská lidová republika

Strany od

1

Strany do

8

Strany počet

8

URL

https://link.springer.com/article/10.1007%2Fs12274-020-3281-z

BibTex

@article{BUT171420,
  author="Garlyyev, B. and Watzele, S. and Fichtner, J. and Michalicka, J. and Schokel, A. and Senyshyn, A. and Perego, A. and Pan, DJ. and El-Sayed, HA. and Macak, JM. and Atanassov, P. and Zenyuk, IV. and Bandarenka, AS.",
  title="Electrochemical top-down synthesis of C-supported Pt nano-particles with controllable shape and size: Mechanistic insights and application",
  journal="Nano Research",
  year="2021",
  volume="14",
  number="8",
  pages="1--8",
  doi="10.1007/s12274-020-3281-z",
  issn="1998-0000",
  url="https://link.springer.com/article/10.1007%2Fs12274-020-3281-z"
}