Methanol oxidation was studied in 0.1 M NaOH at supported Pt electrodes, and compared with the single crystal Pt electrodes, Pt(1 1 1), Pt(1 1 0) and Pt(3 3 2), chosen as model systems, and with a polycrystalline Pt electrode. The supported Pt electrodes were obtained by chemical (Pt–C/GC) and electrochemical (Pt/GC) deposition of the catalyst layer on glassy carbon resulting in the same metal loading of 20 μgPt cm−2. Using STM in air, the average particle size distributions, 3–6 nm at Pt–C/GC and 4–32 nm at Pt/GC were determined. Both supported Pt catalysts were less active than polycrystalline Pt. Negligible differences in the kinetics observed between Pt–C/GC and Pt(1 1 0) and also Pt/GC and Pt(1 1 1) suggested that the activities of supported Pt electrodes could be correlated with the activities of single crystal Pt electrodes oriented as the sites dominating in the Pt particles in catalyst deposits. The electrocatalytic activities of the electrodes studied increase in the sequence...: Pt(3 3 2) > polycrystalline Pt > Pt–C/GC ∼ Pt(1 1 0) > Pt/GC ∼ Pt(1 1 1). On the basis of diagnostic criteria obtained, the chemical reaction between HCOad and OHad giving formate was proposed as the rate limiting step in methanol oxidation.
TY - JOUR
AU - Tripković, Amalija
AU - Popović, Ksenija
AU - Lović, Jelena
AU - Jovanović, Vladislava M.
AU - Kowal, Andrzej
PY - 2004
UR - https://cer.ihtm.bg.ac.rs/handle/123456789/2884
AB - Methanol oxidation was studied in 0.1 M NaOH at supported Pt electrodes, and compared with the single crystal Pt electrodes, Pt(1 1 1), Pt(1 1 0) and Pt(3 3 2), chosen as model systems, and with a polycrystalline Pt electrode. The supported Pt electrodes were obtained by chemical (Pt–C/GC) and electrochemical (Pt/GC) deposition of the catalyst layer on glassy carbon resulting in the same metal loading of 20 μgPt cm−2. Using STM in air, the average particle size distributions, 3–6 nm at Pt–C/GC and 4–32 nm at Pt/GC were determined. Both supported Pt catalysts were less active than polycrystalline Pt. Negligible differences in the kinetics observed between Pt–C/GC and Pt(1 1 0) and also Pt/GC and Pt(1 1 1) suggested that the activities of supported Pt electrodes could be correlated with the activities of single crystal Pt electrodes oriented as the sites dominating in the Pt particles in catalyst deposits. The electrocatalytic activities of the electrodes studied increase in the sequence: Pt(3 3 2) > polycrystalline Pt > Pt–C/GC ∼ Pt(1 1 0) > Pt/GC ∼ Pt(1 1 1). On the basis of diagnostic criteria obtained, the chemical reaction between HCOad and OHad giving formate was proposed as the rate limiting step in methanol oxidation.
PB - Elsevier
T2 - Journal of Electroanalytical Chemistry
T1 - Methanol oxidation at platinum electrodes in alkaline solution: comparison between supported catalysts and model system
VL - 572
IS - 1
SP - 119
EP - 128
DO - 10.1016/j.jelechem.2004.06.007
ER -
@article{
author = "Tripković, Amalija and Popović, Ksenija and Lović, Jelena and Jovanović, Vladislava M. and Kowal, Andrzej",
year = "2004",
abstract = "Methanol oxidation was studied in 0.1 M NaOH at supported Pt electrodes, and compared with the single crystal Pt electrodes, Pt(1 1 1), Pt(1 1 0) and Pt(3 3 2), chosen as model systems, and with a polycrystalline Pt electrode. The supported Pt electrodes were obtained by chemical (Pt–C/GC) and electrochemical (Pt/GC) deposition of the catalyst layer on glassy carbon resulting in the same metal loading of 20 μgPt cm−2. Using STM in air, the average particle size distributions, 3–6 nm at Pt–C/GC and 4–32 nm at Pt/GC were determined. Both supported Pt catalysts were less active than polycrystalline Pt. Negligible differences in the kinetics observed between Pt–C/GC and Pt(1 1 0) and also Pt/GC and Pt(1 1 1) suggested that the activities of supported Pt electrodes could be correlated with the activities of single crystal Pt electrodes oriented as the sites dominating in the Pt particles in catalyst deposits. The electrocatalytic activities of the electrodes studied increase in the sequence: Pt(3 3 2) > polycrystalline Pt > Pt–C/GC ∼ Pt(1 1 0) > Pt/GC ∼ Pt(1 1 1). On the basis of diagnostic criteria obtained, the chemical reaction between HCOad and OHad giving formate was proposed as the rate limiting step in methanol oxidation.",
publisher = "Elsevier",
journal = "Journal of Electroanalytical Chemistry",
title = "Methanol oxidation at platinum electrodes in alkaline solution: comparison between supported catalysts and model system",
volume = "572",
number = "1",
pages = "119-128",
doi = "10.1016/j.jelechem.2004.06.007"
}
Tripković, A., Popović, K., Lović, J., Jovanović, V. M.,& Kowal, A.. (2004). Methanol oxidation at platinum electrodes in alkaline solution: comparison between supported catalysts and model system. in Journal of Electroanalytical Chemistry
Elsevier., 572(1), 119-128.
https://doi.org/10.1016/j.jelechem.2004.06.007
Tripković A, Popović K, Lović J, Jovanović VM, Kowal A. Methanol oxidation at platinum electrodes in alkaline solution: comparison between supported catalysts and model system. in Journal of Electroanalytical Chemistry. 2004;572(1):119-128.
doi:10.1016/j.jelechem.2004.06.007 .
Tripković, Amalija, Popović, Ksenija, Lović, Jelena, Jovanović, Vladislava M., Kowal, Andrzej, "Methanol oxidation at platinum electrodes in alkaline solution: comparison between supported catalysts and model system" in Journal of Electroanalytical Chemistry, 572, no. 1 (2004):119-128,
https://doi.org/10.1016/j.jelechem.2004.06.007 . .
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