Issue 4, 2019

Layer-by-layer integration of conducting polymers and metal organic frameworks onto electrode surfaces: enhancement of the oxygen reduction reaction through electrocatalytic nanoarchitectonics

Abstract

In this work we explore a nanoarchitectonics approach to construct functional composite nanomaterials with enhanced electrocatalytic properties. Functional electrodes were designed in order to combine two key elements: high surface area and porosity with electroactivity, thus enabling their application to the enhancement of the electrochemical oxygen reduction reaction (ORR). We propose a simple, yet unexplored, layer-by-layer (LbL) method which makes use of sequential assembly of colloidal suspensions of polyaniline/polystyrene sulfonate (Pani-PSS), and polyallylamine hydrochloride-coated ZIF-8 metal organic framework nanocrystals (PAH-ZIF-8). The Pani-PSS/PAH-ZIF-8 nanoarchitecture thus obtained benefits from the synergy between the electroactivity provided by the negatively charged conducting polymer component (Pani-PSS), and the high-surface area porous environment provided by the positively charged MOF counterpart (PAH-ZIF-8). LbL-assembled films were found to be electrically connected and feature promising increases in the electrocatalytic currents obtained for the ORR in neutral pH aqueous environments.

Graphical abstract: Layer-by-layer integration of conducting polymers and metal organic frameworks onto electrode surfaces: enhancement of the oxygen reduction reaction through electrocatalytic nanoarchitectonics

Supplementary files

Article information

Article type
Paper
Submitted
15 Janv. 2019
Accepted
08 Apr. 2019
First published
08 Apr. 2019

Mol. Syst. Des. Eng., 2019,4, 893-900

Layer-by-layer integration of conducting polymers and metal organic frameworks onto electrode surfaces: enhancement of the oxygen reduction reaction through electrocatalytic nanoarchitectonics

A. P. Mártire, G. M. Segovia, O. Azzaroni, M. Rafti and W. Marmisollé, Mol. Syst. Des. Eng., 2019, 4, 893 DOI: 10.1039/C9ME00007K

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