Specific features of the formation, catalytic activity, and corrosion stability of PdCu electrolytic co-deposit

A mixed electrolytic deposit (ED) of PdCu (~20 at.% Cu) is synthesized from a solution of 1 mМ PdSO 4  + 5 mМ CuSO 4  + 0.5 M H 2 SO 4 in the region of copper underpotential deposition (+400 mV vs. RHE). The incorporation of copper into the Pd deposit increases its true surface area ( S true ) by a...

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Bibliographic Details
Published in:Journal of solid state electrochemistry 2020-06, Vol.24 (6), p.1439-1444
Main Authors: Podlovchenko, Boris I., Gladysheva, Tatyana D., Maksimov, Yurii M., Volkov, Dmitry S., Maslakov, Konstantin I.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Catalytic activity
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Copper
Electrochemistry
Energy Storage
Physical Chemistry
Short Communication
Solubility
Sulfuric acid
Underpotential deposition
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Summary:A mixed electrolytic deposit (ED) of PdCu (~20 at.% Cu) is synthesized from a solution of 1 mМ PdSO 4  + 5 mМ CuSO 4  + 0.5 M H 2 SO 4 in the region of copper underpotential deposition (+400 mV vs. RHE). The incorporation of copper into the Pd deposit increases its true surface area ( S true ) by a factor of ~20 and changes its hydrogen sorption characteristics. The ED PdCu demonstrates higher specific activity in FAOR as compared with individual Pd deposit ( Е dep   =  0.4 V). The specific solubility of Pd from ED PdCu is shown to be 2–3 times lower than the solubility of ED Pd; however, its total solubility from PdCu increases due to the strong increase in S true .
ISSN:1432-8488
1433-0768
DOI:10.1007/s10008-020-04612-3