TY  - CONF
A1  - Muntean, Roxana
A1  - Rost, Ulrich
A1  - Marginean, Gabriela
A1  - Vaszilcsin, Nicolae
A2  - Transilvania University of Brasov - Romania. Faculty of Materials Science and Engineering, 
T1  - Determination of the electrochemical surface area for CNTs-PT electro catalyst using cyclic voltammetry
T2  - Konferenz: BraMat 2015, 9th International Conference on Materials Science & Engineering, March 5-7, 2015. Book of Abstracts
N2  - Platinum is one of the most effective electro catalysts for PEMFCs (proton exchange membrane fuel cells), but because of its prohibitive price, the use of this metal in industrial purposes is limited. As a consequence, during last years, several materials have been investigated, in order to obtain an efficient catalyst for both ORR (oxygen reduction reaction) and HOR (hydrogen oxidation reaction), which can replace the expensive platinum but preserving the same properties: high electrical conductivity, structural stability and good corrosion resistance. Moreover, one of the most important parameters for catalyst materials is the electrochemical surface area (real surface area), which has a strong influence on the reaction rate and also on the current density.
CNFs (carbon nanofibers) are considered to be a promising catalyst support material due to their unique characteristics, excellent mechanical, electrical and structural properties, high surface area and nevertheless, good interaction with platinum particles. 
The possibility of preparing CNFs decorated with platinum by electrochemical methods was tested, using a hexachloroplatinic solution bath. The experiments were carried out with the aid of a Potentiostat/Galvanostat MMate 510, in a three – electrode cell.
The aim of the present work was to determine the electrochemical surface area of the CNFs – Pt catalysts, using an electrochemical method. The obtained results correlate very well with the particles size and distribution of platinum, analyzed by SEM (scanning electron microscopy) respectively with the quantity of deposited platinum determined by TG (thermo gravimetrical analyses). Cyclic voltammetry is a suitable method for estimation of the real surface area for catalyst particles.
Y1  - 2015
UR  - https://whge.opus.hbz-nrw.de/frontdoor/index/index/docId/943
SP  - 170
PB  - Transilvania University of Brasov - Romania
CY  - Brasov
ER  -