Comparative potentiodynamic study of nickel and hydrogen underpotential deposition at polycrystalline platinum electrode in weak acid and neutral solutions
Само за регистроване кориснике
2005
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Underpotential deposition of nickel and hydrogen on polycrystalline platinum in weak acid and neutral solutions (3.5 lt = pH lt = 7.0), with and without Ni2+-ions, has been examined using cyclic voltammetric technique in the range of temperature from 274 to 313 K. The nickel and hydrogen ad-atom surface coverages were calculated from the voltammetric adsorption and desorption charges. The Temkin isotherm was fitted for both underpotential depositions, and thermodynamic adsorption parameters were calculated for both atoms. The value of the bonding energy between hydrogen and surface in the presence of underpotentially deposited nickel was calculated and found to amount to 287 kJ mol(-1), which is 40 kJ mol(-1) stronger bond than the same of pure platinum. The presence of nickel on the surface facilitates interfacial transfer of hydrogen into the metal bulk and consequent hydride formation significant in design of hydrogen based fuel cells.
Кључне речи:
adsorption parameters / nickel and hydrogen underpotential deposition / polycrystalline platinumИзвор:
Materials Science Forum, 2005, 494, 241-246Издавач:
- 6th Conference of the Yugoslav Materials Research Society, YUCOMAT VI: Current Research in Advanced Materials and Processes
DOI: 10.4028/0-87849-971-7.241
ISSN: 0255-5476
PubMed:
WoS: 000230985800040
Scopus: 2-s2.0-33749611872
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Obradović, Maja AU - Grgur, Branimir AU - Vračar, Ljiljana M. PY - 2005 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/716 AB - Underpotential deposition of nickel and hydrogen on polycrystalline platinum in weak acid and neutral solutions (3.5 lt = pH lt = 7.0), with and without Ni2+-ions, has been examined using cyclic voltammetric technique in the range of temperature from 274 to 313 K. The nickel and hydrogen ad-atom surface coverages were calculated from the voltammetric adsorption and desorption charges. The Temkin isotherm was fitted for both underpotential depositions, and thermodynamic adsorption parameters were calculated for both atoms. The value of the bonding energy between hydrogen and surface in the presence of underpotentially deposited nickel was calculated and found to amount to 287 kJ mol(-1), which is 40 kJ mol(-1) stronger bond than the same of pure platinum. The presence of nickel on the surface facilitates interfacial transfer of hydrogen into the metal bulk and consequent hydride formation significant in design of hydrogen based fuel cells. PB - 6th Conference of the Yugoslav Materials Research Society, YUCOMAT VI: Current Research in Advanced Materials and Processes T2 - Materials Science Forum T1 - Comparative potentiodynamic study of nickel and hydrogen underpotential deposition at polycrystalline platinum electrode in weak acid and neutral solutions EP - 246 SP - 241 VL - 494 DO - 10.4028/0-87849-971-7.241 ER -
@article{ author = "Obradović, Maja and Grgur, Branimir and Vračar, Ljiljana M.", year = "2005", abstract = "Underpotential deposition of nickel and hydrogen on polycrystalline platinum in weak acid and neutral solutions (3.5 lt = pH lt = 7.0), with and without Ni2+-ions, has been examined using cyclic voltammetric technique in the range of temperature from 274 to 313 K. The nickel and hydrogen ad-atom surface coverages were calculated from the voltammetric adsorption and desorption charges. The Temkin isotherm was fitted for both underpotential depositions, and thermodynamic adsorption parameters were calculated for both atoms. The value of the bonding energy between hydrogen and surface in the presence of underpotentially deposited nickel was calculated and found to amount to 287 kJ mol(-1), which is 40 kJ mol(-1) stronger bond than the same of pure platinum. The presence of nickel on the surface facilitates interfacial transfer of hydrogen into the metal bulk and consequent hydride formation significant in design of hydrogen based fuel cells.", publisher = "6th Conference of the Yugoslav Materials Research Society, YUCOMAT VI: Current Research in Advanced Materials and Processes", journal = "Materials Science Forum", title = "Comparative potentiodynamic study of nickel and hydrogen underpotential deposition at polycrystalline platinum electrode in weak acid and neutral solutions", pages = "246-241", volume = "494", doi = "10.4028/0-87849-971-7.241" }
Obradović, M., Grgur, B.,& Vračar, L. M.. (2005). Comparative potentiodynamic study of nickel and hydrogen underpotential deposition at polycrystalline platinum electrode in weak acid and neutral solutions. in Materials Science Forum 6th Conference of the Yugoslav Materials Research Society, YUCOMAT VI: Current Research in Advanced Materials and Processes., 494, 241-246. https://doi.org/10.4028/0-87849-971-7.241
Obradović M, Grgur B, Vračar LM. Comparative potentiodynamic study of nickel and hydrogen underpotential deposition at polycrystalline platinum electrode in weak acid and neutral solutions. in Materials Science Forum. 2005;494:241-246. doi:10.4028/0-87849-971-7.241 .
Obradović, Maja, Grgur, Branimir, Vračar, Ljiljana M., "Comparative potentiodynamic study of nickel and hydrogen underpotential deposition at polycrystalline platinum electrode in weak acid and neutral solutions" in Materials Science Forum, 494 (2005):241-246, https://doi.org/10.4028/0-87849-971-7.241 . .