Comparing Pt electrodeposition processes on nitrogen-doped graphene nanosheets for the electroreduction of oxygen

Pt nanoparticles are electrodeposited on nitrogen-doped graphene nanosheets using different electrodeposition procedures such as cyclic voltammetry, chronoamperometry and pulse deposition while keeping the overall deposition time and precursor concentration constant. A comparison of electrodepositio...

Full description

Saved in:
Bibliographic Details
Published in:Journal of solid state electrochemistry 2024-05, Vol.28 (5), p.1681-1690
Main Authors: Hussain, Sajid, Erikson, Heiki, Kozlova, Jekaterina, Tamm, Aile, Tammeveski, Kaido
Format: Article
Language:English
Subjects:
Analytical Chemistry
Catalysts
Characterization and Evaluation of Materials
Chemical reduction
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Electrochemistry
Electrodeposition
Electrowinning
Energy Storage
Graphene
Nanoparticles
Nanosheets
Nitrogen
Nucleation
Original Paper
Oxygen reduction reactions
Perchloric acid
Physical Chemistry
Platinum
Rotating disks
Voltammetry
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Pt nanoparticles are electrodeposited on nitrogen-doped graphene nanosheets using different electrodeposition procedures such as cyclic voltammetry, chronoamperometry and pulse deposition while keeping the overall deposition time and precursor concentration constant. A comparison of electrodeposition in Ar-saturated and O 2 -saturated solutions was also made to study the influence of competing oxygen reduction and hydrogen adsorption/desorption on the electroreduction of Pt ions. Scanning electron microscopy results showed that the surface morphology of the Pt catalysts is dependent on the electrodeposition protocol and nucleation overpotential. The particle size and number density of the electrodeposited Pt nanoparticles vary from sample to sample. Cyclic voltammetry and CO stripping experiments in 0.1 M HClO 4 solution showed different surface electrochemistry of the Pt catalysts. Rotating disk electrode measurement revealed that all the catalysts are highly active towards the oxygen reduction reaction in perchloric acid. Graphical Abstract
ISSN:1432-8488
1433-0768
DOI:10.1007/s10008-023-05687-4