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Conducting Polymer-Based Nanohybrids for Fuel Cell Application.

Srabanti Ghosh¹, Suparna Das², Marta E G Mosquera¹

¹Department of Organic and Inorganic Chemistry, Universidad de Alcala (UAH), 28805 Alcalá de Henares, Madrid, Spain.

|December 18, 2020

Summary

Conducting polymer-based nanohybrids (CPNHs) offer superior electrocatalyst support for fuel cells. These materials, particularly those incorporating palladium and platinum alloys, show significantly enhanced catalytic activity for ethanol and methanol oxidation compared to traditional supports.

Keywords:

anode catalysts catalysts support cathode catalysts conducting polymer electrooxidation fuel cell functionalization maximum power density nanohybrids

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Area of Science:

Materials Science
Electrochemistry
Nanotechnology

Background:

Carbon materials are common electrocatalyst supports in fuel cells.
Conducting polymers (CPs) offer high conductivity and stability, making them promising alternatives.
Metal or metal oxide catalysts immobilized on CPs form nanohybrids (CPNHs) with enhanced properties.

Purpose of the Study:

To review recent progress on conducting polymer-based nanohybrids (CPNHs) for fuel cell applications.
To understand the characteristics, modifications, and performance of CPNH electrode materials.
To highlight the advantages of CPNHs over traditional supports.

Main Methods:

Immobilization of metal/metal oxide catalysts onto conducting polymers.
Fabrication of conducting polymer-based nanohybrids (CPNHs).
Electrocatalytic performance testing for fuel oxidation reactions (ethanol, methanol).

Main Results:

Pd/polypyrrole (PPy) CPNHs showed 7.5-78 times higher mass activity for ethanol oxidation than commercial Pd/C and bulk Pd/PPy.
Palladium-rich alloys on PPy nanofibers exhibited 5.5 times higher activity than monometallic counterparts.
Pt-rich electrocatalysts on PPy demonstrated superior methanol oxidation activity, with Pt24Pd26Au50/PPy achieving 15 times higher activity than commercial Pt/C.

Conclusions:

CPNHs provide a stable, environmentally friendly platform for advanced bio/electro-catalysts.
These materials offer enhanced catalytic activity and electron-transfer rates for fuel cells.
CPNHs represent a significant advancement in electrode materials for polymer electrolyte membrane fuel cells (PEMFCs) and microbial fuel cells (MFCs).