NDLI: The kinetics of reduction of palladium (II) complexes with β-alanine at dropping mercury electrode and the complexes’ stability constants

Content Provider	Springer Nature Link
Author	Spiridov, V. N. Astakhova, R. K. Balushkina, S. R. Kravtsov, V. I. Spiridova, V. B.
Copyright Year	2009
Abstract	By using dc and ac polarography, the kinetics of electroreduction of the palladium (II) complexes with β-alanine at a dropping mercury electrode was studied in solutions with the palladium (II) concentration from 2 × 10$^{−5}$ to 2 × 10$^{−4}$ M and variable β-alanine and sodium perchlorate concentrations (pH 6–12). One polarographic wave was observed in solutions with pH 9 and 10 at the β-alanine overall concentration of c $_{βala}$ = 1 × 10$^{−3}$ to 5 × 10$^{−2}$ M; two waves, at lower pH or higher c $_{βala}$. It was concluded on the formation of different forms of palladium (II) complexes in the studied solutions; the complexes contained two to four β-alanine coordinated anions. Using the limiting diffusion currents for the two waves at pH 9–11 and c $_{βala}$ = 0.1 and 0.5 M, the stepwise stability constant for the Pd(βala) 4 2− complex was calculated. Using two ac peaks observed at pH 7–8 and c $_{βala}$ = 1 × 10$^{−2}$ to 0.1 M, the stepwise stability constant for the Pd(βala) 3 − . was calculated. The perchlorate ions adsorbed at the dropping mercury electrode, as well as βala$^{−}$ anions at their higher concentrations, hamper the electroreduction of the palladium (II) complexes with β-alanine.
Starting Page	123
Ending Page	131
Page Count	9
File Format	PDF
ISSN	10231935
Journal	Russian Journal of Electrochemistry
Volume Number	45
Issue Number	2
e-ISSN	16083342
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2009-03-11
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	polarography electroreduction kinetics palladium (II) complexes β-alanine palladium (II) complex stability constant Physical Chemistry Electrochemistry
Content Type	Text
Resource Type	Article
Subject	Electrochemistry

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