TY  - CONF
AU  - Ristić, Nikola
AU  - Kotorcević, M
AU  - Lačnjevac, Časlav
AU  - Jokić, AM
AU  - Jaksić, MM
PY  - 2000
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/229
AB  - Three distinct potentiodynamic features have been scanned on cyclic voltammograms in the presence of simple (formaldehyde, acetaldehyde), and some specific (cinnam aldehyde, croton aldehyde, furfural and benzaldehyde) aldehydes: (a) anodic oxidation of aldehyde group proceeds as a direct heterogeneous reaction with weakly or reversibly adsorbed OH-adatomic group, or in overall, as an electrode kinetics similar to Volmer-Heyrovsky mechanism for hydrogen evolution (R-CHO + 2M-OH double right arrow R-COOH + H2O + 2M + 2e), which is practically the same as the Lamy mechanism; (b) as the result, the oxide growth upon Pt, Pd, Au electrode substrates becomes prevailingly or partially prevented and reflects in the proportionally reduced charge capacity for its desorption peak, and (c) the consequence of the latter represents the unusual, but sharply pronounced reverse current jump into anodic range with peaks of repeated aldehyde oxidation during reversal potential scans towards hydrogen evolving limits. Aldehyde reduction, except on Au and Hg, occurs as the heterogeneous catalytic reaction with adsorbed H-adatoms and appears competitive with hydrogen evolution, and while being for about two order of magnitude faster than H-adatom recombination, at lower current densities (about 10 mA cm(-2)) yields rather high current efficiencies (above 90%). Oxygen evolution proceeds along with aldehyde oxidation and only at rather high positive potentials prevails in both surface oxide formation and thereby reduced rate in carboxylic acid production. At extremely positive anodic potentials on Au electrode, there appears a distinct peak of carboxylic group oxidation with release of CO2, preceding oxygen evolution, or occurring along with the latter.
PB  - Pergamon-Elsevier Science Ltd, Oxford
C3  - Electrochimica Acta
T1  - Some specific potentiodynamic behaviour of certain aldehydes and monosaccharides - Some simple and some specific aldehydes
EP  - 2989
IS  - 18
SP  - 2973
VL  - 45
DO  - 10.1016/S0013-4686(00)00376-5
ER  - 

@conference{
author = "Ristić, Nikola and Kotorcević, M and Lačnjevac, Časlav and Jokić, AM and Jaksić, MM",
year = "2000",
abstract = "Three distinct potentiodynamic features have been scanned on cyclic voltammograms in the presence of simple (formaldehyde, acetaldehyde), and some specific (cinnam aldehyde, croton aldehyde, furfural and benzaldehyde) aldehydes: (a) anodic oxidation of aldehyde group proceeds as a direct heterogeneous reaction with weakly or reversibly adsorbed OH-adatomic group, or in overall, as an electrode kinetics similar to Volmer-Heyrovsky mechanism for hydrogen evolution (R-CHO + 2M-OH double right arrow R-COOH + H2O + 2M + 2e), which is practically the same as the Lamy mechanism; (b) as the result, the oxide growth upon Pt, Pd, Au electrode substrates becomes prevailingly or partially prevented and reflects in the proportionally reduced charge capacity for its desorption peak, and (c) the consequence of the latter represents the unusual, but sharply pronounced reverse current jump into anodic range with peaks of repeated aldehyde oxidation during reversal potential scans towards hydrogen evolving limits. Aldehyde reduction, except on Au and Hg, occurs as the heterogeneous catalytic reaction with adsorbed H-adatoms and appears competitive with hydrogen evolution, and while being for about two order of magnitude faster than H-adatom recombination, at lower current densities (about 10 mA cm(-2)) yields rather high current efficiencies (above 90%). Oxygen evolution proceeds along with aldehyde oxidation and only at rather high positive potentials prevails in both surface oxide formation and thereby reduced rate in carboxylic acid production. At extremely positive anodic potentials on Au electrode, there appears a distinct peak of carboxylic group oxidation with release of CO2, preceding oxygen evolution, or occurring along with the latter.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Electrochimica Acta",
title = "Some specific potentiodynamic behaviour of certain aldehydes and monosaccharides - Some simple and some specific aldehydes",
pages = "2989-2973",
number = "18",
volume = "45",
doi = "10.1016/S0013-4686(00)00376-5"
}

Ristić, N., Kotorcević, M., Lačnjevac, Č., Jokić, A.,& Jaksić, M.. (2000). Some specific potentiodynamic behaviour of certain aldehydes and monosaccharides - Some simple and some specific aldehydes. in Electrochimica Acta
Pergamon-Elsevier Science Ltd, Oxford., 45(18), 2973-2989.
https://doi.org/10.1016/S0013-4686(00)00376-5

Ristić N, Kotorcević M, Lačnjevac Č, Jokić A, Jaksić M. Some specific potentiodynamic behaviour of certain aldehydes and monosaccharides - Some simple and some specific aldehydes. in Electrochimica Acta. 2000;45(18):2973-2989.
doi:10.1016/S0013-4686(00)00376-5 .

Ristić, Nikola, Kotorcević, M, Lačnjevac, Časlav, Jokić, AM, Jaksić, MM, "Some specific potentiodynamic behaviour of certain aldehydes and monosaccharides - Some simple and some specific aldehydes" in Electrochimica Acta, 45, no. 18 (2000):2973-2989,
https://doi.org/10.1016/S0013-4686(00)00376-5 . .

TY  - JOUR
AU  - Jaksić, JM
AU  - Ristić, Nikola
AU  - Krstajić, NV
AU  - Jaksić, MM
PY  - 1998
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/143
AB  - The Brewer valence-bond theory for bonding in metals and intermetallic phases has been employed, together with Fermi dynamics, to correlate with the electrocatalytic properties of both individual and composite transition metal catalysts for the hydrogen electrode reactions (HELR). It has been inferred that the electrocatalytic activity of both individual transition metals and their intermetallic phases and alloys for both hydrogen evolution (HER) and its oxidation (HOR), primarily correlates with the electronic density of states and obeys typical laws of catalysis reflected in the first place in the existence of volcano plots along the Periodic Table: Since the bonding effectiveness of both individual and intermetallic hypo-hyper-d-electronic transition metal composite electrocatalysts correlates in a straightforward manner with their electrocatalytic activity, such evidence strongly suggests Fermi energy, as a typical elementary binding energy, which otherwise stays in the linear relation with cohesive energy, this forms the basis in investigation and correlation of electrocatalytic activity. Due to the fact that the Fermi wave-vector represents the individual and collective (alloys and intermetallic phases) bulk property of the available electronic number density (or its concentration, n, i.e., k(F) = (3 pi(2)n)(1/3)), and in a straightforward manner correlates with the electronic;density of states at the Fermi lever, and thereby defines all metallic properties of a metal (and intermetallics) as "a solid with a Fermi surface", including electrocatalytic features, it has been taken as the main parameter to correlate with the exchange current density in the hydrogen electrode reactions.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - International Journal of Hydrogen Energy
T1  - Electrocatalysis for hydrogen electrode reactions in the light of Fermi dynamics and structural bonding factors - I. Individual electrocatalytic properties of transition metals
EP  - 1156
IS  - 12
SP  - 1121
VL  - 23
DO  - 10.1016/S0360-3199(98)00014-7
ER  - 

@article{
author = "Jaksić, JM and Ristić, Nikola and Krstajić, NV and Jaksić, MM",
year = "1998",
abstract = "The Brewer valence-bond theory for bonding in metals and intermetallic phases has been employed, together with Fermi dynamics, to correlate with the electrocatalytic properties of both individual and composite transition metal catalysts for the hydrogen electrode reactions (HELR). It has been inferred that the electrocatalytic activity of both individual transition metals and their intermetallic phases and alloys for both hydrogen evolution (HER) and its oxidation (HOR), primarily correlates with the electronic density of states and obeys typical laws of catalysis reflected in the first place in the existence of volcano plots along the Periodic Table: Since the bonding effectiveness of both individual and intermetallic hypo-hyper-d-electronic transition metal composite electrocatalysts correlates in a straightforward manner with their electrocatalytic activity, such evidence strongly suggests Fermi energy, as a typical elementary binding energy, which otherwise stays in the linear relation with cohesive energy, this forms the basis in investigation and correlation of electrocatalytic activity. Due to the fact that the Fermi wave-vector represents the individual and collective (alloys and intermetallic phases) bulk property of the available electronic number density (or its concentration, n, i.e., k(F) = (3 pi(2)n)(1/3)), and in a straightforward manner correlates with the electronic;density of states at the Fermi lever, and thereby defines all metallic properties of a metal (and intermetallics) as "a solid with a Fermi surface", including electrocatalytic features, it has been taken as the main parameter to correlate with the exchange current density in the hydrogen electrode reactions.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "International Journal of Hydrogen Energy",
title = "Electrocatalysis for hydrogen electrode reactions in the light of Fermi dynamics and structural bonding factors - I. Individual electrocatalytic properties of transition metals",
pages = "1156-1121",
number = "12",
volume = "23",
doi = "10.1016/S0360-3199(98)00014-7"
}

Jaksić, J., Ristić, N., Krstajić, N.,& Jaksić, M.. (1998). Electrocatalysis for hydrogen electrode reactions in the light of Fermi dynamics and structural bonding factors - I. Individual electrocatalytic properties of transition metals. in International Journal of Hydrogen Energy
Pergamon-Elsevier Science Ltd, Oxford., 23(12), 1121-1156.
https://doi.org/10.1016/S0360-3199(98)00014-7

Jaksić J, Ristić N, Krstajić N, Jaksić M. Electrocatalysis for hydrogen electrode reactions in the light of Fermi dynamics and structural bonding factors - I. Individual electrocatalytic properties of transition metals. in International Journal of Hydrogen Energy. 1998;23(12):1121-1156.
doi:10.1016/S0360-3199(98)00014-7 .

Jaksić, JM, Ristić, Nikola, Krstajić, NV, Jaksić, MM, "Electrocatalysis for hydrogen electrode reactions in the light of Fermi dynamics and structural bonding factors - I. Individual electrocatalytic properties of transition metals" in International Journal of Hydrogen Energy, 23, no. 12 (1998):1121-1156,
https://doi.org/10.1016/S0360-3199(98)00014-7 . .

TY  - JOUR
AU  - Rajković, Miloš
AU  - Vladisavljević, Goran
AU  - Ristić, Nikola
AU  - Jaksić, MM
PY  - 1998
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/141
AB  - On the basis of an old Cominco, Trail. B.C., idea of preconditioning silver (0.8 wt%) alloyed lead electrodes for a proper passivation, optimal, chemically balanced and more economical process has been developed for use in Zn electrowinning. A relatively short time anodic polarization of Fb(As) electrodes in sulphuric acid containing fluoride ions, (as a stimulating agent for protective and compact layer formation of beta-PbO2), is found to give a compact, homogeneous, long lasting passivation layer of beta-PbO2. The presence of a small amount of F--ions in the passive layer of beta-PbO2 enables the passive oxide deposit to behave as long lasting, Monitoring of Pb-ions emission testifies that the preconditioned electrode will have more than ten years of life zinc electrowinning. An additional contribution is the exchanged chemical balance of manganese species in solution: the detrimental MnO2 production is dramatically reduced. The most important achievement of the process represents, winning of pure zinc.
PB  - Central Electrochem Res Inst, Karaikkudi
T2  - Bulletin of Electrochemistry
T1  - A preconditioning process for extended passivation of alloyed lead anodes in zinc electrowinning
EP  - 114
IS  - 3
SP  - 107
VL  - 14
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_141
ER  - 

@article{
author = "Rajković, Miloš and Vladisavljević, Goran and Ristić, Nikola and Jaksić, MM",
year = "1998",
abstract = "On the basis of an old Cominco, Trail. B.C., idea of preconditioning silver (0.8 wt%) alloyed lead electrodes for a proper passivation, optimal, chemically balanced and more economical process has been developed for use in Zn electrowinning. A relatively short time anodic polarization of Fb(As) electrodes in sulphuric acid containing fluoride ions, (as a stimulating agent for protective and compact layer formation of beta-PbO2), is found to give a compact, homogeneous, long lasting passivation layer of beta-PbO2. The presence of a small amount of F--ions in the passive layer of beta-PbO2 enables the passive oxide deposit to behave as long lasting, Monitoring of Pb-ions emission testifies that the preconditioned electrode will have more than ten years of life zinc electrowinning. An additional contribution is the exchanged chemical balance of manganese species in solution: the detrimental MnO2 production is dramatically reduced. The most important achievement of the process represents, winning of pure zinc.",
publisher = "Central Electrochem Res Inst, Karaikkudi",
journal = "Bulletin of Electrochemistry",
title = "A preconditioning process for extended passivation of alloyed lead anodes in zinc electrowinning",
pages = "114-107",
number = "3",
volume = "14",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_141"
}

Rajković, M., Vladisavljević, G., Ristić, N.,& Jaksić, M.. (1998). A preconditioning process for extended passivation of alloyed lead anodes in zinc electrowinning. in Bulletin of Electrochemistry
Central Electrochem Res Inst, Karaikkudi., 14(3), 107-114.
https://hdl.handle.net/21.15107/rcub_agrospace_141

Rajković M, Vladisavljević G, Ristić N, Jaksić M. A preconditioning process for extended passivation of alloyed lead anodes in zinc electrowinning. in Bulletin of Electrochemistry. 1998;14(3):107-114.
https://hdl.handle.net/21.15107/rcub_agrospace_141 .

Rajković, Miloš, Vladisavljević, Goran, Ristić, Nikola, Jaksić, MM, "A preconditioning process for extended passivation of alloyed lead anodes in zinc electrowinning" in Bulletin of Electrochemistry, 14, no. 3 (1998):107-114,
https://hdl.handle.net/21.15107/rcub_agrospace_141 .

TY  - JOUR
AU  - Ristić, Nikola
AU  - Lačnjevac, Časlav
AU  - Jokić, AM
AU  - Tsiplakides, D
AU  - Jaksić, MM
PY  - 1997
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/112
AB  - Two distinct specific features have been clearly observed and recorded by cyclic voltammetry in alkaline aldehyde (typical simple aldehydes and monosaccharides) solutions: (a) Heterogeneous reaction of aldehyde group hydrogenation at its higher concentrations removes hydrogen adsorption and desorption peaks in cyclic voltammograms and provides rather high (over 90 percent) current efficiencies at remarkably high current densities (even above 10 mA cm(-2)) for corresponding alcohol yields; and (b) anodic oxidation of the aldehyde group by its specific electrode reaction mechanism suppresses and even prevents any surface oxide growth at noble metal substrates, and thereby creates a new reverse current jump in the anodic range of repeated aldehyde oxidation within the same cycle during the reversal potential scan towards the hydrogen evolution limits. For various aldehydes, including monosaccharides, the surface oxide desorption peak clearly depends in its charge capacity on the rate of oxidation of the aldehyde groups for each individual reactant and/or the number of adsorbed aldehyde groups per unit area of the electrode surface: the smallest was in the presence of formaldehyde, the largest with d-fructose.
T2  - Russian Journal of Electrochemistry
T1  - Certain specific electrochemical behaviour of some aldehydes. Potentiodynamic investigations
EP  - 725
IS  - 7
SP  - 714
VL  - 33
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_112
ER  - 

@article{
author = "Ristić, Nikola and Lačnjevac, Časlav and Jokić, AM and Tsiplakides, D and Jaksić, MM",
year = "1997",
abstract = "Two distinct specific features have been clearly observed and recorded by cyclic voltammetry in alkaline aldehyde (typical simple aldehydes and monosaccharides) solutions: (a) Heterogeneous reaction of aldehyde group hydrogenation at its higher concentrations removes hydrogen adsorption and desorption peaks in cyclic voltammograms and provides rather high (over 90 percent) current efficiencies at remarkably high current densities (even above 10 mA cm(-2)) for corresponding alcohol yields; and (b) anodic oxidation of the aldehyde group by its specific electrode reaction mechanism suppresses and even prevents any surface oxide growth at noble metal substrates, and thereby creates a new reverse current jump in the anodic range of repeated aldehyde oxidation within the same cycle during the reversal potential scan towards the hydrogen evolution limits. For various aldehydes, including monosaccharides, the surface oxide desorption peak clearly depends in its charge capacity on the rate of oxidation of the aldehyde groups for each individual reactant and/or the number of adsorbed aldehyde groups per unit area of the electrode surface: the smallest was in the presence of formaldehyde, the largest with d-fructose.",
journal = "Russian Journal of Electrochemistry",
title = "Certain specific electrochemical behaviour of some aldehydes. Potentiodynamic investigations",
pages = "725-714",
number = "7",
volume = "33",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_112"
}

Ristić, N., Lačnjevac, Č., Jokić, A., Tsiplakides, D.,& Jaksić, M.. (1997). Certain specific electrochemical behaviour of some aldehydes. Potentiodynamic investigations. in Russian Journal of Electrochemistry, 33(7), 714-725.
https://hdl.handle.net/21.15107/rcub_agrospace_112

Ristić N, Lačnjevac Č, Jokić A, Tsiplakides D, Jaksić M. Certain specific electrochemical behaviour of some aldehydes. Potentiodynamic investigations. in Russian Journal of Electrochemistry. 1997;33(7):714-725.
https://hdl.handle.net/21.15107/rcub_agrospace_112 .

Ristić, Nikola, Lačnjevac, Časlav, Jokić, AM, Tsiplakides, D, Jaksić, MM, "Certain specific electrochemical behaviour of some aldehydes. Potentiodynamic investigations" in Russian Journal of Electrochemistry, 33, no. 7 (1997):714-725,
https://hdl.handle.net/21.15107/rcub_agrospace_112 .

TY  - JOUR
AU  - Jokić, A.
AU  - Ristić, Nikola
AU  - Jaksić, M.M.
AU  - Spasojević, M.
AU  - Krstajić, N.
PY  - 1991
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/68
AB  - A new electrocatalytic process for simultaneous electrolytic production of xylitol and xylonic acid or the corresponding xylonate salts directly from α-d-xylose in alkaline solutions of neutral salt as supporting electrolyte has been developed and presented. An electrocatalytically active cathode coating with essentially hydridic features has been employed to enhance Faradaic yields in xylitol production at low current densities by heterogeneous reaction of hydrogenation with H-adatoms, and the entire mechanism has been proved by experimental evidence. An anionic selective anodic coating for titanium substrate was also used to suppress oxygen evolution and optimize the xylonic acid production by direct oxidation with anodically generated bromine, and to carry out the electrode process at almost equilibrium potential. The kinetic effect of specifically adsorbable anions for decreasing cathodic current yields in xylitol production and the resulting necessity for membrane separation of catholyte from anolyte, with proper optimization of the supporting neutral salt composition, has also been emphasized.
T2  - Journal of Applied Electrochemistry
T1  - Simultaneous electrolytic production of xylitol and xylonic acid from xylose
EP  - 326
IS  - 4
SP  - 321
VL  - 21
DO  - 10.1007/BF01020216
ER  - 

@article{
author = "Jokić, A. and Ristić, Nikola and Jaksić, M.M. and Spasojević, M. and Krstajić, N.",
year = "1991",
abstract = "A new electrocatalytic process for simultaneous electrolytic production of xylitol and xylonic acid or the corresponding xylonate salts directly from α-d-xylose in alkaline solutions of neutral salt as supporting electrolyte has been developed and presented. An electrocatalytically active cathode coating with essentially hydridic features has been employed to enhance Faradaic yields in xylitol production at low current densities by heterogeneous reaction of hydrogenation with H-adatoms, and the entire mechanism has been proved by experimental evidence. An anionic selective anodic coating for titanium substrate was also used to suppress oxygen evolution and optimize the xylonic acid production by direct oxidation with anodically generated bromine, and to carry out the electrode process at almost equilibrium potential. The kinetic effect of specifically adsorbable anions for decreasing cathodic current yields in xylitol production and the resulting necessity for membrane separation of catholyte from anolyte, with proper optimization of the supporting neutral salt composition, has also been emphasized.",
journal = "Journal of Applied Electrochemistry",
title = "Simultaneous electrolytic production of xylitol and xylonic acid from xylose",
pages = "326-321",
number = "4",
volume = "21",
doi = "10.1007/BF01020216"
}

Jokić, A., Ristić, N., Jaksić, M.M., Spasojević, M.,& Krstajić, N.. (1991). Simultaneous electrolytic production of xylitol and xylonic acid from xylose. in Journal of Applied Electrochemistry, 21(4), 321-326.
https://doi.org/10.1007/BF01020216

Jokić A, Ristić N, Jaksić M, Spasojević M, Krstajić N. Simultaneous electrolytic production of xylitol and xylonic acid from xylose. in Journal of Applied Electrochemistry. 1991;21(4):321-326.
doi:10.1007/BF01020216 .

Jokić, A., Ristić, Nikola, Jaksić, M.M., Spasojević, M., Krstajić, N., "Simultaneous electrolytic production of xylitol and xylonic acid from xylose" in Journal of Applied Electrochemistry, 21, no. 4 (1991):321-326,
https://doi.org/10.1007/BF01020216 . .