Dimensionality-Dependent Electrochemical Kinetics at the Single-Layer Graphene–Electrolyte Interface

The theories to describe the rate at which electrochemical reactions proceed, to date, do not consider explicitly the dimensionality or the discreteness and occupancy of the energy levels of the electrodes. We show experimentally that such quantum mechanical aspects are important for dimensionally c...

Full description

Saved in:
Bibliographic Details
Published in:The journal of physical chemistry letters 2017-09, Vol.8 (17), p.4004-4008
Main Authors: Narayanan, R, Yamada, H, Marin, B. C, Zaretski, A, Bandaru, P. R
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The theories to describe the rate at which electrochemical reactions proceed, to date, do not consider explicitly the dimensionality or the discreteness and occupancy of the energy levels of the electrodes. We show experimentally that such quantum mechanical aspects are important for dimensionally confined nanostructured materials and yield unusual variation of the kinetic rate constants with applied voltage in single-layer graphene. The observed divergence from conventional electrokinetics was ascribed to the linear energy dispersion as well as a nonzero density of states at the Dirac point in the graphene. The obtained results justify the use of density of states-based rate constants and considerably add to Marcus–Hush–Chidsey kinetics.
ISSN:1948-7185
1948-7185
DOI:10.1021/acs.jpclett.7b01688