Publication detail

Atomic Layer Deposition of Electrocatalytic Insulator Al2O3 on Three-Dimensional Printed Nanocarbons

NG, S. IFFELSBERGER, C. MICHALIČKA, J. PUMERA, M.

Original Title

Atomic Layer Deposition of Electrocatalytic Insulator Al2O3 on Three-Dimensional Printed Nanocarbons

Type

journal article in Web of Science

Language

English

Original Abstract

The advantages of three-dimensional (3D) printing technologies, such as rapid-prototyping and the freedom to customize electrodes in any design, have elevated the benchmark of conventional electrochemical studies. Furthermore, the 3D printed electrodes conveniently accommodate other active layers for diverse applications such as energy storage, catalysis, and sensors. Nevertheless, to enhance a complex 3D structure while preserving the fine morphology, conformal deposition by atomic layer deposition (ALD) technique is a powerful solution. Herein, we present the concept of coating Al2O3 by ALD with different thicknesses from 20 to 120 cycles on the 3D printed nanocarbon/PLA electrodes for the electrocatalytic oxidation of catechol as an important biomarker. Overall, 80 ALD cycle Al2O3 achieved an optimum thickness for catechol electrocatalysis. This is resonated with the enhanced adsorption of catechol at the electrode surface and efficient electron transfer, according to the two-proton, two-electron-transfer mechanism, as well as for the passivation of surface defects of the nanocarbon electrode. This work compellingly demonstrates the prospect of 3D printed electrodes modified by a functional layer utilizing a low-temperature ALD process that can be extended to other arbitrary surfaces.

Keywords

three-dimensional printing; Al2O3 coating; nucleation; scanning electrochemical microscope; electrocatalyst; catechol oxidation; charge transfer

Authors

NG, S.; IFFELSBERGER, C.; MICHALIČKA, J.; PUMERA, M.

Released

26. 1. 2021

Publisher

AMER CHEMICAL SOC

Location

WASHINGTON

ISBN

1936-0851

Periodical

ACS Nano

Year of study

15

Number

1

State

United States of America

Pages from

686

Pages to

697

Pages count

12

URL

https://pubs.acs.org/doi/10.1021/acsnano.0c06961#

BibTex

@article{BUT171206,
  author="Siow Woon {Ng} and Christian {Iffelsberger} and Jan {Michalička} and Martin {Pumera}",
  title="Atomic Layer Deposition of Electrocatalytic Insulator Al2O3 on Three-Dimensional Printed Nanocarbons",
  journal="ACS Nano",
  year="2021",
  volume="15",
  number="1",
  pages="686--697",
  doi="10.1021/acsnano.0c06961",
  issn="1936-0851",
  url="https://pubs.acs.org/doi/10.1021/acsnano.0c06961#"
}