Premium
Electrochemical production of Palladium and its use as indicator electrode
Author(s) -
Fouda A. S.,
Mostafa H. A.,
Maussa M. N.,
Elgaber A. S.
Publication year - 1995
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.19950260906
Subject(s) - palladium , chemistry , inorganic chemistry , potassium hydroxide , hydrochloric acid , electrochemistry , titration , chloride , oxalic acid , sodium hydroxide , electrolyte , potassium , titration curve , fluoride , electrode , catalysis , organic chemistry
The electrodeposition of palladium from electrolytes containing palladium chloride along with potassium‐dihydrogen phosphate, sodium fluoride or oxalic acid was studied under a variety of condition. The conditions used were: 1.0 M palladium chloride, 0.15 M potassium dihydrogen phosphate, pH 1.5 at 298 K and current density 0.85 mA cm −2 / The current efficiency was calculated and the crystal structure confirmed by X‐ray analysis. Spectrophotomteric and chemical analysis reveals that the purity of the metal is better than 99%. Palladium electrode can function satisfactorily as indicator electrode for hydrogen ions in acid‐base titrations. Titration of acids with sodium hydroxide and of salts of weak acids with hydrochloric acid showed that palladium can indicate very accurately the end point. The end point coincide to great extent with the visual values with an error not more than ± 2%.