Issue 3, 2016

Electrochemistry of layered GaSe and GeS: applications to ORR, OER and HER

Abstract

Though many studies examined the properties of the class of IIIA–VIA and IVA–VIA layered materials, few have delved into the electrochemical aspect of such materials. In light of the burgeoning interest in layered structures towards various electrocatalytic applications, we endeavored to study the inherent electrochemical properties of representative layered materials of this class, GaSe and GeS, and their impact towards electrochemical sensing of redox probes as well as catalysis of oxygen reduction, oxygen evolution and hydrogen evolution reactions. In contrast to the typical sandwich structure of MoS2 layered materials, GeS is isoelectronic to black phosphorus with the same structure; GaSe is a layered material consisting of GaSe sheets bonded in the sequence Se–Ga–Ga–Se. We characterized GaSe and GeS by employing scanning electron microscopy, X-ray diffraction, Raman spectroscopy and X-ray photoelectron spectroscopy complemented by electronic structure calculations. It was found that the encompassing surface oxide layers on GaSe and GeS greatly influenced their electrochemical properties, especially their electrocatalytic capabilities towards hydrogen evolution reaction. These findings provide fresh insight into the electrochemical properties of these IIIA–VIA and IVA–VIA layered structures which enables development for future applications.

Graphical abstract: Electrochemistry of layered GaSe and GeS: applications to ORR, OER and HER

Supplementary files

Article information

Article type
Paper
Submitted
03 Nov 2015
Accepted
25 Nov 2015
First published
17 Dis 2015

Phys. Chem. Chem. Phys., 2016,18, 1699-1711

Author version available

Electrochemistry of layered GaSe and GeS: applications to ORR, OER and HER

S. M. Tan, C. K. Chua, D. Sedmidubský, Z. Sofer and M. Pumera, Phys. Chem. Chem. Phys., 2016, 18, 1699 DOI: 10.1039/C5CP06682D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements