TY  - JOUR
TI  - Low loaded Pt-Co catalyst surfaces optimized by magnetron sputtering sequential
deposition technique for PEM fuel cell applications: physical and electrochemical
analysis on carbon paper support
AB  - A series of thin Pt-Co films with different metal ratios were deposited by using the sequential cosputtering directly on a commercial hydrophobic carbon paper substrate at room temperature and in ultra-high vacuum (UHV) conditions. Their electrocatalytic properties toward the oxygen reduction reaction were investigated in 0.5 M $H_2 SO_4$ solution by means of cyclic voltammetry (CV) and linear sweep voltammetry (LSV) on rotating disc electrode (RDE). The results showed that Pt particles, deposited by dc-magnetron gun, surround the large Co-clusters deposited by rf-magnetron gun. In addition, the increase of Co content led to an increase in the electrochemical active surface area $(EASA) from 23.75 m_2 /gPt to 47.54 m_2 /gPt for pure Pt and Pt:Co (1:3),$ respectively, which corresponded the improvement of the utilization of Pt by a factor of 1.91. This improvement indicated that the sequential magnetron cosputtering was one of the essential technique to deposit homogeneous metal clusters with desirable size on the gas diffusion layer by adjustment plasma parameters.
AU  - Ahsen, Ali Şems
AU  - Ozdemir, Oguz Kaan
AU  - ozturk, osman
AU  - HASIMOGLU, AYDIN
AU  - Karaaslan, Inci
DO  - 10.3906/kim-2101-50
PY  - 2021
JO  - Turkish Journal of Chemistry
VL  - 45
IS  - 5
SN  - 1300-0527
SP  - 1336
EP  - 1352
DB  - TRDizin
UR  - http://search/yayin/detay/527353
ER  -