Electrochemical oxidation of methanol on Pt3Co bulk alloy
Elektrohemijska oksidacija metanola na leguri Pt3Co
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The electrochemical oxidation of methanol was investigated on a Pt3Co bulk alloy in acid solutions. Kinetic parameters such as transfer coefficient reaction orders with respect to methanol and H+ ions and energy of activation were determined. It was found that the rate of methanol oxidation is significantly diminished by rotation of the electrode. This effect was attributed to the diffusion of formaldehyde and formic acid from the electrode surface. Stirring of the electrolyte also influenced the kinetic parameters of the reaction. It was speculated that the predominant reaction pathway and rate determining step are different in the quiescent and in the stirred electrolyte. Cobalt did not show a promoting effect on the rate of methanol oxidation on the Pt3Co bulk alloy with respect to a pure Pt surface.
Elektrohemijska oksidacija metanola je ispitivana na leguri Pt3Co u kiselim rastvorima. Određeni su kinetički parametri reakcije: koeficijent prelaza redovi reakcije po metanolu i H+ jonu i energija aktivacije. Utvrđeno je da se brzina reakcije značajno smanjuje kada elektroda rotira. Taj efekat je pripisan difuziji formaldehida i mravlje kiseline sa površine elektrode. Mešanje elektrolita takođe utiče na kinetičke parametre reakcije. Diskutovana je mogućnost da su dominantan reakcioni put i spori stupanj u mehanizmu reakcije različiti u mirnom i mešanom elektrolitu. Prisustvo kobalta u leguri nije uticalo na povećanje brzine oksidacije metanola u poređenju sa čistom platinom.
Кључне речи:
methanol / electrochemical oxidation / Pt3Co alloy / direct methanol fuel cellИзвор:
Journal of the Serbian Chemical Society, 2003, 68, 11, 859-870Издавач:
- Serbian Chemical Society, Belgrade
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Gojković, Snežana Lj. PY - 2003 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/584 AB - The electrochemical oxidation of methanol was investigated on a Pt3Co bulk alloy in acid solutions. Kinetic parameters such as transfer coefficient reaction orders with respect to methanol and H+ ions and energy of activation were determined. It was found that the rate of methanol oxidation is significantly diminished by rotation of the electrode. This effect was attributed to the diffusion of formaldehyde and formic acid from the electrode surface. Stirring of the electrolyte also influenced the kinetic parameters of the reaction. It was speculated that the predominant reaction pathway and rate determining step are different in the quiescent and in the stirred electrolyte. Cobalt did not show a promoting effect on the rate of methanol oxidation on the Pt3Co bulk alloy with respect to a pure Pt surface. AB - Elektrohemijska oksidacija metanola je ispitivana na leguri Pt3Co u kiselim rastvorima. Određeni su kinetički parametri reakcije: koeficijent prelaza redovi reakcije po metanolu i H+ jonu i energija aktivacije. Utvrđeno je da se brzina reakcije značajno smanjuje kada elektroda rotira. Taj efekat je pripisan difuziji formaldehida i mravlje kiseline sa površine elektrode. Mešanje elektrolita takođe utiče na kinetičke parametre reakcije. Diskutovana je mogućnost da su dominantan reakcioni put i spori stupanj u mehanizmu reakcije različiti u mirnom i mešanom elektrolitu. Prisustvo kobalta u leguri nije uticalo na povećanje brzine oksidacije metanola u poređenju sa čistom platinom. PB - Serbian Chemical Society, Belgrade T2 - Journal of the Serbian Chemical Society T1 - Electrochemical oxidation of methanol on Pt3Co bulk alloy T1 - Elektrohemijska oksidacija metanola na leguri Pt3Co EP - 870 IS - 11 SP - 859 VL - 68 UR - https://hdl.handle.net/21.15107/rcub_technorep_584 ER -
@article{ author = "Gojković, Snežana Lj.", year = "2003", abstract = "The electrochemical oxidation of methanol was investigated on a Pt3Co bulk alloy in acid solutions. Kinetic parameters such as transfer coefficient reaction orders with respect to methanol and H+ ions and energy of activation were determined. It was found that the rate of methanol oxidation is significantly diminished by rotation of the electrode. This effect was attributed to the diffusion of formaldehyde and formic acid from the electrode surface. Stirring of the electrolyte also influenced the kinetic parameters of the reaction. It was speculated that the predominant reaction pathway and rate determining step are different in the quiescent and in the stirred electrolyte. Cobalt did not show a promoting effect on the rate of methanol oxidation on the Pt3Co bulk alloy with respect to a pure Pt surface., Elektrohemijska oksidacija metanola je ispitivana na leguri Pt3Co u kiselim rastvorima. Određeni su kinetički parametri reakcije: koeficijent prelaza redovi reakcije po metanolu i H+ jonu i energija aktivacije. Utvrđeno je da se brzina reakcije značajno smanjuje kada elektroda rotira. Taj efekat je pripisan difuziji formaldehida i mravlje kiseline sa površine elektrode. Mešanje elektrolita takođe utiče na kinetičke parametre reakcije. Diskutovana je mogućnost da su dominantan reakcioni put i spori stupanj u mehanizmu reakcije različiti u mirnom i mešanom elektrolitu. Prisustvo kobalta u leguri nije uticalo na povećanje brzine oksidacije metanola u poređenju sa čistom platinom.", publisher = "Serbian Chemical Society, Belgrade", journal = "Journal of the Serbian Chemical Society", title = "Electrochemical oxidation of methanol on Pt3Co bulk alloy, Elektrohemijska oksidacija metanola na leguri Pt3Co", pages = "870-859", number = "11", volume = "68", url = "https://hdl.handle.net/21.15107/rcub_technorep_584" }
Gojković, S. Lj.. (2003). Electrochemical oxidation of methanol on Pt3Co bulk alloy. in Journal of the Serbian Chemical Society Serbian Chemical Society, Belgrade., 68(11), 859-870. https://hdl.handle.net/21.15107/rcub_technorep_584
Gojković SL. Electrochemical oxidation of methanol on Pt3Co bulk alloy. in Journal of the Serbian Chemical Society. 2003;68(11):859-870. https://hdl.handle.net/21.15107/rcub_technorep_584 .
Gojković, Snežana Lj., "Electrochemical oxidation of methanol on Pt3Co bulk alloy" in Journal of the Serbian Chemical Society, 68, no. 11 (2003):859-870, https://hdl.handle.net/21.15107/rcub_technorep_584 .