Edge vs. basal plane electrochemistry of layered pnictogens (As, Sb, Bi): Does edge always offer faster electron transfer?

Petr Marvan, Štěpán Huber, Jan Luxa, Vlastimil Mazánek, David Sedmidubský, Zdeněk Sofer, Martin Pumera

Research output: Contribution to journalArticle

Abstract

Materials with layered structure are at the forefront of material research. Graphite, MoS2 and black phosphorus, as layered materials, exhibit, in general, fast heterogeneous transfer at the edge planes and slow at the basal plane for many electroactive molecules. There is a fundamental question whether this is general behaviour of layered materials. Here, we examined fundamental electrochemistry of layered pnictogens (As, Sb and Bi)using single crystal edge- and basal-plane electrodes. Significant differences in behaviour of edge and basal plane surface for the electrochemical properties were found. The surface morphology of electrodes was examinated in detail. The electrochemical activity was investigated by both, inner and outer sphere probes. Several trends related to the pnictogen position in periodic table were observed. Importantly, an increasing activity of basal plane with atomic number was observed and attributed to the decreasing degree of anisotropy. However, catalytic activity towards hydrogen evolution reaction (HER)was observed only for the edge-planes of the electrodes.

Original languageEnglish
Pages (from-to)179-184
Number of pages6
JournalApplied Materials Today
Volume16
DOIs
Publication statusPublished - 2019 Sep 1

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Electrochemistry
Electrons
Electrodes
Graphite
Electrochemical properties
Phosphorus
Surface morphology
Hydrogen
Catalyst activity
Anisotropy
Single crystals
Molecules

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Marvan, Petr ; Huber, Štěpán ; Luxa, Jan ; Mazánek, Vlastimil ; Sedmidubský, David ; Sofer, Zdeněk ; Pumera, Martin. / Edge vs. basal plane electrochemistry of layered pnictogens (As, Sb, Bi) : Does edge always offer faster electron transfer?. In: Applied Materials Today. 2019 ; Vol. 16. pp. 179-184.
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Edge vs. basal plane electrochemistry of layered pnictogens (As, Sb, Bi) : Does edge always offer faster electron transfer? / Marvan, Petr; Huber, Štěpán; Luxa, Jan; Mazánek, Vlastimil; Sedmidubský, David; Sofer, Zdeněk; Pumera, Martin.

In: Applied Materials Today, Vol. 16, 01.09.2019, p. 179-184.

Research output: Contribution to journalArticle

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