Abstract
The phase structure of palladium–bismuth binary electrolytic deposit was studied. The electrodeposition of deposit components on the surface of a graphite electrode (GE) was carried out in situ. On current–voltage curves, the peak of bismuth electrooxidation, the peak of palladium electrooxidation and an additional peak at 0.15 V vs. Ag/AgCl are observed. The peak current at 0.15 V depends both on the concentration of palladium(II) ions and on that of bismuth(III) ions. The thermodynamic theory of alloys in the approximation of the theory of regular solutions was used for calculations. The mixing heat of the binary alloy components and the equilibrium potential of bismuth in the bismuth–palladium alloy are calculated. The calculated equilibrium potential of bismuth in an alloy with palladium is 0.12 V vs. Ag/AgCl which corresponds to the Bi2Pd intermetallic compound (IMC). Investigation of the surface of a GE with a palladium–bismuth deposit with use of scanning electron microscope showed that the electrolytic deposit contains bismuth, palladium and the Bi2Pd IMC. Peak at the potential of plus 0.15 V vs. Ag/AgCl is due to selective bismuth electrooxidation from the Bi2Pd IMC.
| Original language | English |
|---|---|
| Pages (from-to) | 3717-3723 |
| Number of pages | 7 |
| Journal | Journal of Solid State Electrochemistry |
| Volume | 22 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 1 Dec 2018 |
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Keywords
- Bismuth–palladium deposit
- Mixing heat of components
- Modified electrode
- Regular solution
- Stripping voltammetry
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Electrochemistry
- Electrical and Electronic Engineering
Cite this
Study of electrooxidation of binary electrolytic deposit palladium–bismuth deposited on graphite electrode surface. / Sabitova, Zhamilya K.; Oskina, Yulia A.; Kolpakova, Nina A.
In: Journal of Solid State Electrochemistry, Vol. 22, No. 12, 01.12.2018, p. 3717-3723.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Study of electrooxidation of binary electrolytic deposit palladium–bismuth deposited on graphite electrode surface
AU - Sabitova, Zhamilya K.
AU - Oskina, Yulia A.
AU - Kolpakova, Nina A.
PY - 2018/12/1
Y1 - 2018/12/1
N2 - The phase structure of palladium–bismuth binary electrolytic deposit was studied. The electrodeposition of deposit components on the surface of a graphite electrode (GE) was carried out in situ. On current–voltage curves, the peak of bismuth electrooxidation, the peak of palladium electrooxidation and an additional peak at 0.15 V vs. Ag/AgCl are observed. The peak current at 0.15 V depends both on the concentration of palladium(II) ions and on that of bismuth(III) ions. The thermodynamic theory of alloys in the approximation of the theory of regular solutions was used for calculations. The mixing heat of the binary alloy components and the equilibrium potential of bismuth in the bismuth–palladium alloy are calculated. The calculated equilibrium potential of bismuth in an alloy with palladium is 0.12 V vs. Ag/AgCl which corresponds to the Bi2Pd intermetallic compound (IMC). Investigation of the surface of a GE with a palladium–bismuth deposit with use of scanning electron microscope showed that the electrolytic deposit contains bismuth, palladium and the Bi2Pd IMC. Peak at the potential of plus 0.15 V vs. Ag/AgCl is due to selective bismuth electrooxidation from the Bi2Pd IMC.
AB - The phase structure of palladium–bismuth binary electrolytic deposit was studied. The electrodeposition of deposit components on the surface of a graphite electrode (GE) was carried out in situ. On current–voltage curves, the peak of bismuth electrooxidation, the peak of palladium electrooxidation and an additional peak at 0.15 V vs. Ag/AgCl are observed. The peak current at 0.15 V depends both on the concentration of palladium(II) ions and on that of bismuth(III) ions. The thermodynamic theory of alloys in the approximation of the theory of regular solutions was used for calculations. The mixing heat of the binary alloy components and the equilibrium potential of bismuth in the bismuth–palladium alloy are calculated. The calculated equilibrium potential of bismuth in an alloy with palladium is 0.12 V vs. Ag/AgCl which corresponds to the Bi2Pd intermetallic compound (IMC). Investigation of the surface of a GE with a palladium–bismuth deposit with use of scanning electron microscope showed that the electrolytic deposit contains bismuth, palladium and the Bi2Pd IMC. Peak at the potential of plus 0.15 V vs. Ag/AgCl is due to selective bismuth electrooxidation from the Bi2Pd IMC.
KW - Bismuth–palladium deposit
KW - Mixing heat of components
KW - Modified electrode
KW - Regular solution
KW - Stripping voltammetry
UR - http://www.scopus.com/inward/record.url?scp=85053058737&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85053058737&partnerID=8YFLogxK
U2 - 10.1007/s10008-018-4084-y
DO - 10.1007/s10008-018-4084-y
M3 - Article
VL - 22
SP - 3717
EP - 3723
JO - Journal of Solid State Electrochemistry
JF - Journal of Solid State Electrochemistry
SN - 1432-8488
IS - 12
ER -