Next Article in Journal
Acknowledgement to Reviewers of Surfaces in 2018
Next Article in Special Issue
Surface Investigation on Electrochemically Deposited Lead on Gold
Previous Article in Journal / Special Issue
X-ray Absorption under Operating Conditions for Solid-Oxide Fuel Cells Electrocatalysts: The Case of LSCF/YSZ
Article Menu
Issue 1 (March) cover image

Export Article

Open AccessArticle

Co3O4 Nanopetals on Si as Photoanodes for the Oxidation of Organics

Department of Chemical Sciences, University of Padova, via Marzolo 1, 35121 Padova, Italy
Physics and Astronomy Department, University of Padova, via Marzolo 6, 35121 Padova, Italy
Author to whom correspondence should be addressed.
Surfaces 2019, 2(1), 41-53;
Received: 13 November 2018 / Revised: 8 January 2019 / Accepted: 9 January 2019 / Published: 11 January 2019
(This article belongs to the Special Issue Electrochemical Surface Science: Basics and Applications)
PDF [7765 KB, uploaded 11 January 2019]
  |     |  


Cobalt oxide nanopetals were grown on silicon electrodes by heat-treating metallic cobalt films deposited by DC magnetron sputtering. We show that cobalt oxide, with this peculiar nanostructure, is active towards the photo-electrochemical oxidation of water as well as of organic molecules, and that its electrochemical properties are directly linked to the structure of its surface. The formation of Co3O4 nanopetals, induced by oxidizing annealing at 300 °C, considerably improves the performance of the material with respect to simple cobalt oxide films. Photocurrent measurements and electrochemical impedance are used to explain the behavior of the different structures and to highlight their potential application in water remediation technologies. View Full-Text
Keywords: cobalt oxide; water oxidation; photo-electrochemistry; hydroxyl radical; electro-oxidation cobalt oxide; water oxidation; photo-electrochemistry; hydroxyl radical; electro-oxidation

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary material


Share & Cite This Article

MDPI and ACS Style

Girardi, L.; Bardini, L.; Michieli, N.; Kalinic, B.; Maurizio, C.; Rizzi, G.A.; Mattei, G. Co3O4 Nanopetals on Si as Photoanodes for the Oxidation of Organics. Surfaces 2019, 2, 41-53.

Show more citation formats Show less citations formats

Article Metrics

Article Access Statistics



[Return to top]
Surfaces EISSN 2571-9637 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top