Electrodeposition of platinum on polytyramine-modified electrodes for electrocatalytic applications

• Published in: Electrochimica acta Vol. 54; no. 12; pp. 3316 - 3319
• Main Authors: Spătaru, Tanţa, Marcu, Maria, Banu, Alexandra, Roman, Eugen, Spătaru, Nicolae
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 30-04-2009; Elsevier
• Subjects: Chemistry; Composite material; Electrochemistry; Electrodeposition; Exact sciences and technology; General and physical chemistry; Phenol oxidation; Platinum deposition; Polytyramine; Study of interfaces; Phenol oxidation; Polytyramine; Composite material; Platinum deposition; Aromatic polymer; Transition metal; Ether polymer; Functional polymer; Sulfuric acid; Electrodes; Electrocatalysis; Phenylene derivative polymer; Amine polymer; Platinum; Graphite; Phenols; Electrodeposition; Oxidation; Electrochemical reaction; Application; Modified material
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2008.12.050

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
m
2
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.