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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:05 |
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Conference: Bucharest University Faculty of Physics 2012 Meeting
Section: Physics and Technology of Alternative Renewable Energy Supplies
Title:
Synthesis and characterization of Co- catalyst supported on nanosized carbon for PEMFC applications
Authors:
Cristina E. SERBAN, Nicoleta BANU, Ana-Maria DUCU, Alexandra M. I. TREFILOV, Ana CUCU, Adriana BALAN, S.M IORDACHE, S. STAMATIN, I. STAMATIN
Affiliation:
University of Bucharest, Physics Department, 3 Nano-SAE Research Centre, Bucharest, Romania
E-mail
istarom@3nanosae.org
Keywords:
fuel cells, cobalt catalyst, nanosized carbon
Abstract:
PEM fuel cell is one the most actually intensively studied for hydrogen - oxygen couple conversion into electrical power. Electrocatalyst performances is determinant for hydrogen oxidation reaction (HOR) at anode electrode and oxygen reduction reaction (ORR) at catod electrode. Pt is a representative catalyst in this applications, but it has a few drawbacks, such as poisoning to CO. Usually Pt is used as deposited on nanocarbon materials to improve the electron transfer to the collector-electrodes. Another problem of fuel cells with polymeric electrolyte is the high cost of Pt, for that to try replacing platinum with another less expensive electrocatalyst. The aim of this work is the chemical deposition of cobalt (Co) nanostructures of a carbon black (Ketjen Black) and graphene oxide (GOX).This contribution deal with the electrochemical activity of Co deposited on nanostructure of Ketjen Black using chemical deposition aiming to investigate the correlation between a new cheaper electrocatalyst and carbon black support. The structure and morphology of these Co/carbon nanostructures has been performed by scanning electron microscopy (SEM). To indentify the particles size the obtained samples were investigated by DLS. The size distribution by number of Co/carbon has a value between 72-191 nm. Electrochemical activity of the cobalt electrocatalyst was investigated by cyclic voltammetry in different solution: 0.1 M HClO4, 0.5 M H2SO4 and 0.5 M NaOH.
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