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Oxidation of formic acid on platinum electrodeposited on polished and oxidized glassy carbon
Affiliation:1. University of Belgrade, ICTM – Institute of Electrochemistry, Njegoševa 12, P.O. Box 473, 11000 Belgrade, Serbia and Montenegro;2. Institute of Catalysis and Surface Chemistry, Polish Academy of Science, Krakow, Niezapominajek 8, 30-239, Poland;1. Research Group for Radiation Transport and Analysis, Environment and Radiation Sciences Division, Nuclear Science and Engineering Center, Japan Atomic Energy Agency, Shirakata, Tokai, Ibaraki 319-1195, Japan;2. Research Group for Radiation Materials Engineering, Fuels and Materials Engineering Division, Nuclear Science and Engineering Center, Japan Atomic Energy Agency, Shirakata, Tokai, Ibaraki 319-1195, Japan;1. School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450000, PR China;2. Department of Chemistry, Tsinghua University, Beijing 100086, PR China;3. Lab of Advanced Power Sources and Key Laboratory of Thermal Management Engineering and Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, PR China;4. National Research Council of Canada, Vancouver, BC, V6T 1W5, Canada;1. Southern Scientific Center of the Russian Academy of Sciences, 344006 Rostov-on-Don, Russian Federation;2. Institute of Physical and Organic Chemistry, Southern Federal University, 344090 Rostov-on-Don, Russian Federation;1. Analytical Chemistry Division, BARC, Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata 700064, India;2. Dept. of Chemistry, Surendranath College, Kolkata 700009, India;3. National Centre for Compositional Characterization of Materials, BARC, ECIL Post, Hyderabad 500062, India;4. Surface Physics Material Science Division, Saha Institute of Nuclear Physics, 1/AF, Bidhan Nagar, Kolkata 700064, India;5. Analytical Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
Abstract:Formic acid oxidation at platinum electrochemically deposited on polished (GC/Pt) and oxidized glassy carbon (GCox/Pt) was examined with the objective of studying the effect of electrochemical treatment of the support on deposition of platinum and on the activity of Pt catalyst. The electrodes were characterised by STM and XPS techniques. The oxidative treatment of the support leads to deposition of smaller Pt particles in comparison with the one on the polished substrate. The XPS spectra indicated the increased fraction of functional (acidic) groups on the treated support as well as the higher fraction of oxygen containing species on Pt catalyst deposited on oxidised referring to Pt deposited on polished substrate.The activity of GCox/Pt electrode is increased by the factor of 2–4 for formic acid oxidation compared to the activity of GC/Pt electrode. This result is explained by the oxidative removal of COad species leading to enhanced amount of Pt free sites available for direct formic acid oxidation to CO2.
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