Jump to main content
Jump to site search

Issue 34, 2018
Previous Article Next Article

Diffusion controlled multilayer electrocatalysts via graphene oxide nanosheets of varying sizes

Author affiliations

Abstract

Controlling the architecture of hybrid nanomaterial electrodes is critical for understanding their fundamental electrochemical mechanisms and applying these materials in future energy conversion and storage systems. Herein, we report highly tunable electrocatalytic multilayer electrodes, composed of palladium nanoparticles (Pd NPs) supported by graphene sheets of varying lateral sizes, employing a versatile layer-by-layer (LbL) assembly method. We demonstrate that the electrocatalytic activity is highly tunable through the control of the diffusion and electron pathways within the 3-dimensional multilayer electrodes. A larger-sized-graphene-supported electrode exhibited its maximum performance with a thinner film, due to facile charge transfer by the mass transfer limited in the early stage, while a smaller-sized-graphene-supported electrode exhibited its highest current density with higher mass loading in the thicker films by enabling facile mass transfer through increased diffusion pathways. These findings of the tortuous-path effect on the electrocatalytic electrode supported by varying sized graphene provide new insights and a novel design principle into electrode engineering that will be beneficial for the development of effective electrocatalysts.

Graphical abstract: Diffusion controlled multilayer electrocatalysts via graphene oxide nanosheets of varying sizes

Back to tab navigation

Supplementary files

Publication details

The article was received on 10 Apr 2018, accepted on 27 Jul 2018 and first published on 30 Jul 2018


Article type: Paper
DOI: 10.1039/C8NR02883D
Citation: Nanoscale, 2018,10, 16159-16168
  •   Request permissions

    Diffusion controlled multilayer electrocatalysts via graphene oxide nanosheets of varying sizes

    M. Gu, J. Choi, T. Lee, M. Park, I. Shin, J. Hong, H. Lee and B. Kim, Nanoscale, 2018, 10, 16159
    DOI: 10.1039/C8NR02883D

Search articles by author

Spotlight

Advertisements