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Title: Electrochemistry of layered semiconducting AᴵᴵᴵBᵛᴵ chalcogenides : indium monochalcogenides (InS, InSe, InTe)
Authors: Wang, Yong
Szökölová, Katerina
Muhammad Zafir Mohamad Nasir
Sofer, Zdenek
Pumera, Martin
Keywords: Science::Chemistry
Issue Date: 2019
Source: Wang, Y., Szökölová, K., Muhammad Zafir Mohamad Nasir, Sofer, Z. & Pumera, M. (2019). Electrochemistry of layered semiconducting AᴵᴵᴵBᵛᴵ chalcogenides : indium monochalcogenides (InS, InSe, InTe). ChemCatChem, 11(11), 2634-2642.
Journal: ChemCatChem
Abstract: Layered AᴵᴵᴵBᵛᴵ chalcogenides represent an interesting class semiconductors, where most of adopting 2D structures. Unlike the typical sandwiched structure of transition metal dichalcogenides (TMDs), layered AᴵᴵᴵBᵛᴵ chalcogenides like InSe and GaSe are composed of X−M−M−X motif where M is gallium/indium and X is sulfur/selenium/tellurium. The exception is InS, which adopt an orthorhombic 3D structure. Herein, we studied and compared the inherent electrochemical properties as well as the electrocatalytic performances towards hydrogen evolution (HER), oxygen evolution (OER) and oxygen reduction reaction (ORR) of indium monochalcogenides (InS, InSe and InTe). Inherent electrochemistry studies in phosphate buffered saline electrolyte showed that InS did not exhibit any inherent electrochemical signals when compared to bare glassy carbon electrode. However, InSe showed a reduction peak at −1.6 V while InTe had an oxidation peak at 0.2 V. The heterogeneous electron transfer (HET) rates of indium monochalcogenides were measured with [Fe(CN)₆]³⁻⁄ ⁴⁻ redox probe using cyclic voltammetry (vs. Ag/AgCl) at the scan rate of 100 mV s⁻¹. It was found that InTe exhibited the best electrochemical performance with the fastest HET rate with highest k 0 obs obtained (3.7×10⁻³cm s⁻¹). InS showed the best electrocatalytic performance for HER with the lowest overpotential value of 0.92 V at current density of −10 mA cm⁻². However, the performances of indium monochalcogenides were almost comparable to that of bare glassy carbon electrode and do not exhibit any improvements in electrocatalytic capabilities. This study provides insights into the electrochemical properties and electrocatalytic performances of layered AᴵᴵᴵBᵛᴵ indium monochalcogenides which would influence potential applications.
ISSN: 1867-3880
DOI: 10.1002/cctc.201900449
Rights: © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SPMS Journal Articles

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