2024-03-29T11:27:38Z
https://u-ryukyu.repo.nii.ac.jp/oai
oai:u-ryukyu.repo.nii.ac.jp:02000977
2023-08-03T05:27:14Z
1642838163960:1642838338003
1642838403551:1642838406845
Electrochemical characterization of platinum black electrodeposited from electrolyte including lead acetate trihydrate
Saitou, Masatoshi
platinum black
voltammetry
additive
electrochemical parameters
The effect of lead acetate trihydrate on platinum black coating has been examined for the electrolyte free of or including lead acetate trihydrate using cyclic potential-current curves and a multi-pulse current measurement. The current-potential curves measured with a cyclic sweep of a current density in the electrolyte including lead acetate trihydrate show that no peak assigned to the reduction of Pt (IV) to Pt (II) in the process of electrode reactions is observed. The kinetic constant, the exchange current density and the double-layer capacitance, which can be determined from the measured potential-time curves, exhibit significantly different values for H2PtCl6 electrolytes free of or containing lead acetate trihydrate. In particular, the exchange current density for the electrolyte including lead acetate trihydrate is much larger than that for the electrolyte free of lead acetate trihydrate. These experimental results indicate that lead acetate trihydrate significantly enhances the electrode reactions in platinum black coating by mainly lowering a height of the energy barrier for the reduction of Pt (IV) to Pt (0) and by suppressing the reduction of Pt (IV) to Pt (II).
論文
http://purl.org/coar/resource_type/c_6501
Elsevier Science B.V.
2006
AM
http://hdl.handle.net/20.500.12000/393
0257-8972
AA10652003
Surface & Coatings Technology
6
201
3614
3611
eng
http://www.sciencedirect.com/science/journal/02578972
10.1016/j.surfcoat.2006.08.115
open access