Ministry of Science and Environment Protection of the Republic of Serbia

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Cyclic-voltammetry behavior of Pt(1 1 1) in aqueous HClO4+C6H6 Influence of C6H6 concentration, scan rate and temperature

Obradović, Maja; Lessard, Jean; Jerkiewicz, Gregory

(Elsevier, 2010)

TY  - JOUR
AU  - Obradović, Maja
AU  - Lessard, Jean
AU  - Jerkiewicz, Gregory
PY  - 2010
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/668
AB  - Pt(1 1 1) is modified with an overlayer of C6H6 ads by immersion in 005 or 050 M HClO4 + 1 mM C6H6 and cycling in the 0 05-0 80 V vs RHE potential range The influence of the C6H6 concentration (1-20 mM) scan rate (10-100 mV s(-1)) and temperature (278-318 K) on cyclic-voltammetry (CV) features of Pt(1 1 1) and C6H6 surface excess are examined The surface excess of C6H6 Gamma(C6H6) is evaluated through its oxidative desorption The amount of adsorbed C6H6 corresponds to a sub-monolayer with C6H6 molecules being parallel to the Pt(1 1 1) surface As the amount of dissolved C6H6 increases the surface excess of C6H6 increases to ca 2 monolayers indicating that the C6H6 ads molecules adopt a tilted orientation on Pt(1 1 1) Increase of the scan rate from 10 to 100 mV s(-1) does not result in any shift of the anodic peak but induces a shift of the cathodic peak towards lower potentials An increase of temperature from 278 to 318 K shifts both cathodic and anodic peaks towards higher potentials while at the same time reducing the peak current density However it does not modify the peaks charge density or the C6H6 surface excess The cathodic and anodic CV peaks obtained in 005 or 0 50 M HClO4 + 1 mM C6H6 are assigned to H-UPD adsorption and desorption Repetitive cycling of C6H6-modified Pt(1 1 1) in 005 or 050 M HClO4 (free of C6H6) regenerates the CV profile characteristic of a well ordered Pt(1 1 1) electrode thus indicating that C6H6 adsorption and desorption does not disorder Pt(1 1 1)
PB  - Elsevier
T2  - Journal of Electroanalytical Chemistry
T1  - Cyclic-voltammetry behavior of Pt(1 1 1) in aqueous HClO4+C6H6 Influence of C6H6 concentration, scan rate and temperature
VL  - 649
IS  - 1-2
SP  - 248
EP  - 256
DO  - 10.1016/j.jelechem.2010.04.022
ER  - 
@article{
author = "Obradović, Maja and Lessard, Jean and Jerkiewicz, Gregory",
year = "2010",
abstract = "Pt(1 1 1) is modified with an overlayer of C6H6 ads by immersion in 005 or 050 M HClO4 + 1 mM C6H6 and cycling in the 0 05-0 80 V vs RHE potential range The influence of the C6H6 concentration (1-20 mM) scan rate (10-100 mV s(-1)) and temperature (278-318 K) on cyclic-voltammetry (CV) features of Pt(1 1 1) and C6H6 surface excess are examined The surface excess of C6H6 Gamma(C6H6) is evaluated through its oxidative desorption The amount of adsorbed C6H6 corresponds to a sub-monolayer with C6H6 molecules being parallel to the Pt(1 1 1) surface As the amount of dissolved C6H6 increases the surface excess of C6H6 increases to ca 2 monolayers indicating that the C6H6 ads molecules adopt a tilted orientation on Pt(1 1 1) Increase of the scan rate from 10 to 100 mV s(-1) does not result in any shift of the anodic peak but induces a shift of the cathodic peak towards lower potentials An increase of temperature from 278 to 318 K shifts both cathodic and anodic peaks towards higher potentials while at the same time reducing the peak current density However it does not modify the peaks charge density or the C6H6 surface excess The cathodic and anodic CV peaks obtained in 005 or 0 50 M HClO4 + 1 mM C6H6 are assigned to H-UPD adsorption and desorption Repetitive cycling of C6H6-modified Pt(1 1 1) in 005 or 050 M HClO4 (free of C6H6) regenerates the CV profile characteristic of a well ordered Pt(1 1 1) electrode thus indicating that C6H6 adsorption and desorption does not disorder Pt(1 1 1)",
publisher = "Elsevier",
journal = "Journal of Electroanalytical Chemistry",
title = "Cyclic-voltammetry behavior of Pt(1 1 1) in aqueous HClO4+C6H6 Influence of C6H6 concentration, scan rate and temperature",
volume = "649",
number = "1-2",
pages = "248-256",
doi = "10.1016/j.jelechem.2010.04.022"
}
Obradović, M., Lessard, J.,& Jerkiewicz, G.. (2010). Cyclic-voltammetry behavior of Pt(1 1 1) in aqueous HClO4+C6H6 Influence of C6H6 concentration, scan rate and temperature. in Journal of Electroanalytical Chemistry
Elsevier., 649(1-2), 248-256.
https://doi.org/10.1016/j.jelechem.2010.04.022
Obradović M, Lessard J, Jerkiewicz G. Cyclic-voltammetry behavior of Pt(1 1 1) in aqueous HClO4+C6H6 Influence of C6H6 concentration, scan rate and temperature. in Journal of Electroanalytical Chemistry. 2010;649(1-2):248-256.
doi:10.1016/j.jelechem.2010.04.022 .
Obradović, Maja, Lessard, Jean, Jerkiewicz, Gregory, "Cyclic-voltammetry behavior of Pt(1 1 1) in aqueous HClO4+C6H6 Influence of C6H6 concentration, scan rate and temperature" in Journal of Electroanalytical Chemistry, 649, no. 1-2 (2010):248-256,
https://doi.org/10.1016/j.jelechem.2010.04.022 . .
13
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Petroleum Pollutant Degradation by Surface Water Microorganisms

Antić, Mališa; Jovančićević, Branimir; Ilić, Mila; Vrvić, Miroslav; Schwarzbauer, Jan

(Springer-Verlag GmbH Germany, 2006)

TY  - JOUR
AU  - Antić, Mališa
AU  - Jovančićević, Branimir
AU  - Ilić, Mila
AU  - Vrvić, Miroslav
AU  - Schwarzbauer, Jan
PY  - 2006
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3950
AB  - It is well known that the composition of petroleum or some of its processing products changes in the environment mostly under the influence of microorganisms. A series of experiments was conducted in order to define the optimum conditions for an efficient biodegradation of petroleum pollutant, or bioremediation of different segments of the environment. The aim of these investigations was to show to what extent the hydrocarbons of a petroleum pollutant are degraded by microbial cultures which were isolated as dominant microorganisms from a surface water of a wastewater canal of an oil refinery and a nitrogen plant. Biodegradation experiments were conducted on one paraffinic, and one naphthenic type of petroleum during a three month period under aerobic conditions, varying the following parameters: Inorganic (Kp) or an organic medium (Bh) with or without exposition to light.
PB  - Springer-Verlag GmbH Germany
T2  - Environmental Science and Pollution Research volume
T1  - Petroleum Pollutant Degradation by Surface Water Microorganisms
VL  - 13
SP  - 320
EP  - 327
DO  - 10.1065/espr2006.03.296
ER  - 
@article{
author = "Antić, Mališa and Jovančićević, Branimir and Ilić, Mila and Vrvić, Miroslav and Schwarzbauer, Jan",
year = "2006",
abstract = "It is well known that the composition of petroleum or some of its processing products changes in the environment mostly under the influence of microorganisms. A series of experiments was conducted in order to define the optimum conditions for an efficient biodegradation of petroleum pollutant, or bioremediation of different segments of the environment. The aim of these investigations was to show to what extent the hydrocarbons of a petroleum pollutant are degraded by microbial cultures which were isolated as dominant microorganisms from a surface water of a wastewater canal of an oil refinery and a nitrogen plant. Biodegradation experiments were conducted on one paraffinic, and one naphthenic type of petroleum during a three month period under aerobic conditions, varying the following parameters: Inorganic (Kp) or an organic medium (Bh) with or without exposition to light.",
publisher = "Springer-Verlag GmbH Germany",
journal = "Environmental Science and Pollution Research volume",
title = "Petroleum Pollutant Degradation by Surface Water Microorganisms",
volume = "13",
pages = "320-327",
doi = "10.1065/espr2006.03.296"
}
Antić, M., Jovančićević, B., Ilić, M., Vrvić, M.,& Schwarzbauer, J.. (2006). Petroleum Pollutant Degradation by Surface Water Microorganisms. in Environmental Science and Pollution Research volume
Springer-Verlag GmbH Germany., 13, 320-327.
https://doi.org/10.1065/espr2006.03.296
Antić M, Jovančićević B, Ilić M, Vrvić M, Schwarzbauer J. Petroleum Pollutant Degradation by Surface Water Microorganisms. in Environmental Science and Pollution Research volume. 2006;13:320-327.
doi:10.1065/espr2006.03.296 .
Antić, Mališa, Jovančićević, Branimir, Ilić, Mila, Vrvić, Miroslav, Schwarzbauer, Jan, "Petroleum Pollutant Degradation by Surface Water Microorganisms" in Environmental Science and Pollution Research volume, 13 (2006):320-327,
https://doi.org/10.1065/espr2006.03.296 . .
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