Electrodeposition of platinum on polytyramine-modified electrodes for electrocatalytic applications |
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Authors: | Tan?a Sp?taru Alexandra Banu Nicolae Sp?taru |
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Affiliation: | a Institute of Physical Chemistry “Ilie Murgulescu”, 202 Spl. Independen?ei, 060021, Bucharest, Romania b University POLITEHNICA Bucharest, Faculty of Engineering and Management of Technological Systems, 313 Spl. Independen?ei, 060042, Bucharest, Romania |
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Abstract: | Cyclic voltammetry was used in order to deposit conducting polytyramine (PTy) on graphite substrates. In acidic media, ca. 40 deposition cycles resulted in the formation of stable polymer films with reasonably good resistivity. Electrochemical deposition of platinum on the PTy-covered graphite substrate allowed us to obtain a composite material that exhibits, for a platinum loading of 0.34 mg cm−2, a specific electrochemically active surface area of the Pt particles of ca. 57 m2 g−1. Good electrocatalytic activity of this electrode material for phenol oxidation in acidic media was found, and the results suggested that, when deposited as small particles in a PTy matrix, platinum is less sensitive to deactivation by phenol oxidation polymeric products. |
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Keywords: | Polytyramine Platinum deposition Phenol oxidation Composite material |
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