Ministry of Science

Project type:

Basic Research

Duration

2006-2010

Project Coordinator:

ICTM - Department of Electrochemistry, University of Belgrade

Participants:

• ICTM - Department of Electrochemistry, University of Belgrade;
• Faculty of Chemistry, University of Belgrade;
• Faculty of Technology and Metallurgy, University of Belgrade

Project Manager:

Dr Amalija Tripković, ICTM-Department of Electrochemistry, University of Belgrade

Number of Researchers:

12

Aim and Scope:

Prepared novel Pt-based catalysts were characterized and electrochemically tested in the reactions applied in PEM fuel cells and compared with commercially available catalysts. Study of the alloying effect of Pt with non-noble metals and its modification with submonolayers of adsorbed metals enabled establishing conditions for synthesis of fuel cells nanocatalysts. Correlation of the particle size and structural characteristics of these electrocatalysts with their activities in relevant reactions were determined.

Major Results:

Proton exchange membrane (PEM) fuel cells use electrocatalysts for the oxidation of some small organic molecules (methanol, ethanol and formic acid) at the anode and for the reduction of oxygen at the cathode to achieve efficient energy conversion needed for practical application. New bimetallic catalysts with particles of nano dimensions, obtained by deposition of Pt with non-noble metals on different supports, exhibit improved catalytic activities and lower poisoning effect. Application of bimetallic nano particles supported on high area substrates aiming to decrease consumptions of expensive platinum as well as improve the efficiency, stability and selectivity of the catalysts may solve many of challenging problems in clean energy production and conversion.

Selected publications:

1. A.V. Tripković, K.Dj. Popović, R.M. Stevanović, R. Socha, A. Kowal, "Activity of a PtBi alloy in the oxidation of formic acid", Electrochemistry Communication, 8 (2006) 1492.
2. A.V. Tripković, S.Lj. Gojković, K.Dj. Popović, J.D. Lović, A. Kowal, "Study of the kinetics and influence of Biirr on formic acid oxidation at Pt2Ru3/C", Electrochim. Acta, 53 (2007) 887.
3. D.S.Strmenik, P.Rebec, M.Gaberscek, D.Tripković, V.Stamenković, C.Lucas, N.M.Marković, "Relationship between the surface coverage of spectator species and the rate of electrocatalytic reactions", J.Phys.Chem C, 111 (2007) 18672.
4. D. Tripković, S. Stevanović, A. Tripković, A. Kowal, V. M. Jovanović, ''Strustural effect in electrocatalysis: Formic acid oxidation on Pt electrodeposited on glassy carbon support'', J. Electrochem. Soc., 155 (2008) B281-B289.
5. D. Strmcnik, D. Tripković, D. van der Vliet, V. Stamenković, N.M. Marković, “Adsorption of hydrogen on Pt(111) and Pt(100) surfaces and its role in the HOR“, Electrochem. Communications, 10 (2008) 1602-1605.
6. S. Stevanović, V. Panić, D. Tripković, V. M. Jovanović, “Promoting effect of carbon functional groups in methanol oxidation on supported Pt catalyst“, Electrochem. Commun., 11 (2009) 18-21.
7. A.V. Tripković, K.DJ. Popović, J.D. Lović, V.M. Jovanović, S.I. Stevanović, D.V. Tripković, A. Kowal, "Promotional effect of Snad on the ethanol oxidation at Pt3Sn/C catalyst", Electrochem. Commun., 11 (2009) 1030-1033.
8. M. D. Obradović, A. V. Tripković, S. Lj. Gojković, "The origin of high activity of Pt-Au surfaces in the formic acid oxidation", Electrochim. Acta, 55 (2009) 204–209.
9. V. Tripković, E. Skulason, S. Siahrostami, J. K. Nørskov, J. Rossmeisl, “Oxygen Reduction Reaction Mechanism on Pt(111) from density functional theory calculations”, Electrochim. Acta, 55 (27) (2010) 7975-7981.
10. B. Genorio, D. Strmcnik, R. Subbaraman, D. Tripković, G. Karapetrov, V. R. Stamenković, S. Pejovnik, N. M. Marković, “Selective catalysts for the hydrogen oxidation and oxygen reduction reactions by patterning of platinum with calix[4]arene molecules”, Nature Materials, 9 (2010) 998-1003.

Contacts:

Dr Amalija Tripković, ICTM-Department of Electrochemistry, 11000 Beograd, Njegoševa 12
E-mail: amalija@tmf.bg.ac.rs