scholarly journals Electrocatalytic Conversion of Levulinic Acid in Acid Medium

2021 ◽  
Vol 14 (4) ◽  
pp. 561-569
Author(s):  
Tatyana A. Kenova ◽  
◽  
Nikolay A. Zos’ko ◽  
Valentin V. Sychev ◽  
Oxana P. Taran
Keyword(s):  
Acid Medium ◽  
Glassy Carbon ◽  
Levulinic Acid ◽  
Valeric Acid ◽  
Carbon Electrodes ◽  
H2so4 Solution ◽  
Electrochemical Hydrogenation ◽  
Faradaic Efficiency ◽  
Glassy Carbon Electrodes ◽  
First Time

The electrochemical hydrogenation of levulinic acid in H2SO4 solution at aluminium, lead, graphite and glassy carbon electrodes is studied. The process is identified to proceed selectively to valeric acid. The conversion, selectivity and faradaic efficiency are significantly influenced by the material electrode nature. The levulinic acid hydrogenation at glassy carbon is shown for the first time to proceed to valeric acid, and the process selectivity is affected by the concentration of surface functionalities

Ultrasensitive Electrochemical Determination of Phosphate in water by Hydrophilic TiO2 modified Glassy Carbon Electrodes

2021 ◽  
Author(s):  
Yan Jin ◽  
Tong QI ◽  
Yuqing Ge ◽  
Jin Chen ◽  
Li juan Liang ◽  
...  
Keyword(s):  
Differential Pulse Voltammetry ◽  
Glassy Carbon ◽  
Differential Pulse ◽  
Electrochemical Determination ◽  
Carbon Electrodes ◽  
Glassy Carbon Electrodes ◽  
Time Differential ◽  
Pulse Voltammetry ◽  
First Time

In this paper, ultrasensitive electrochemical determination of phosphate in water is achieved by hydrophilic TiO2 modified glassy carbon electrodes for the first time. Differential pulse voltammetry (DPV) method is proposed...

Chemical sensor development based on poly(o-anisidine)silverized–MWCNT nanocomposites deposited on glassy carbon electrodes for environmental remediation

RSC Advances ◽  
2015 ◽  
Vol 5 (87) ◽  
pp. 71370-71378 ◽  
Author(s):  
Mohammed M. Rahman ◽  
Anish Khan ◽  
Abdullah M. Asiri
Keyword(s):  
Glassy Carbon ◽  
Environmental Remediation ◽  
Adsorption Process ◽  
Chemical Sensor ◽  
Carbon Electrodes ◽  
Glassy Carbon Electrodes ◽  
Sensor Development ◽  
First Time

POAS–Ag/MWCNT nanocomposites were prepared by an adsorption process. A selective 3-methoxyphenolic sensor was developed by an I–V technique for the first time. It displays the highest sensitivity (∼3.829 μA cm−2 mM−1) ever published in the literature.

scholarly journals Grafting of a Molecular Rhenium CO2 Reduction Catalyst onto Colloid-Imprinted Carbon

2019 ◽  
Author(s):  
Janina Willkomm ◽  
Erwan Bertin ◽  
Marwa Atwa ◽  
Jian-Bin Li ◽  
Viola I. Birss ◽  
...  
Keyword(s):  
Glassy Carbon ◽  
Co2 Reduction ◽  
Carbon Electrodes ◽  
Faradaic Efficiency ◽  
Glassy Carbon Electrodes ◽  
Electrode Surfaces ◽  
Improved Stability

An aminophenethyl-substituted [Re(2,2’-bipyridine)(CO)<sub>3</sub>Cl] catalyst (<b>[Re(NH<sub>2</sub>-bpy)]</b>) was tethered to nanoporous colloid-imprinted carbon (CIC) electrode surfaces <i>via</i> an electrochemical oxidative grafting method. Hybrid CIC|<b>[Re(NH<sub>2</sub>-bpy)]</b> electrodes showed an improved stability and an increased loading per geometrical area in comparison to modified smooth glassy carbon electrodes. The catalyst also remained active upon immobilization and CO<sub>2</sub> was selectively reduced to CO by the CIC|<b>[Re(NH<sub>2</sub>-bpy)]</b> electrodes in acetonitrile with a Faradaic efficiency of 92 ± 6% and a Re-based TON of approximately 900.

scholarly journals Grafting of a Molecular Rhenium CO2 Reduction Catalyst onto Colloid-Imprinted Carbon

2019 ◽  
Author(s):  
Janina Willkomm ◽  
Erwan Bertin ◽  
Marwa Atwa ◽  
Jian-Bin Li ◽  
Viola I. Birss ◽  
...  
Keyword(s):  
Glassy Carbon ◽  
Co2 Reduction ◽  
Carbon Electrodes ◽  
Faradaic Efficiency ◽  
Glassy Carbon Electrodes ◽  
Electrode Surfaces ◽  
Improved Stability

An aminophenethyl-substituted [Re(2,2’-bipyridine)(CO)<sub>3</sub>Cl] catalyst (<b>[Re(NH<sub>2</sub>-bpy)]</b>) was tethered to nanoporous colloid-imprinted carbon (CIC) electrode surfaces <i>via</i> an electrochemical oxidative grafting method. Hybrid CIC|<b>[Re(NH<sub>2</sub>-bpy)]</b> electrodes showed an improved stability and an increased loading per geometrical area in comparison to modified smooth glassy carbon electrodes. The catalyst also remained active upon immobilization and CO<sub>2</sub> was selectively reduced to CO by the CIC|<b>[Re(NH<sub>2</sub>-bpy)]</b> electrodes in acetonitrile with a Faradaic efficiency of 92 ± 6% and a Re-based TON of approximately 900.

Electrochemical detection of mercury using biosynthesized hydroxyapatite nanoparticles modified glassy carbon electrodes without preconcentration

RSC Advances ◽  
2015 ◽  
Vol 5 (84) ◽  
pp. 68587-68594 ◽  
Author(s):  
P. Kanchana ◽  
N. Sudhan ◽  
S. Anandhakumar ◽  
J. Mathiyarasu ◽  
P. Manisankar ◽  
...  
Keyword(s):  
Glassy Carbon ◽  
Square Wave Voltammetry ◽  
Aloe Vera ◽  
Carbon Electrodes ◽  
Hydroxyapatite Nanoparticles ◽  
Modified Glassy Carbon Electrode ◽  
Glassy Carbon Electrodes ◽  
Wave Voltammetry ◽  
First Time

An electrochemical method for the determination of trace levels of mercury(ii) ions using Aloe vera (Av) assisted hydroxyapatite (HA) nanoparticles modified glassy carbon electrode (GCE) by square wave voltammetry is described for the first time.

Anodic and cathodic modification of glassy-carbon electrodes affect iodine electrochemistry

2021 ◽  
Vol 379 ◽  
pp. 138181
Author(s):  
Shota Ito ◽  
Masatoshi Sugimasa ◽  
Yuichi Toshimitsu ◽  
Akihiro Orita ◽  
Masaki Kitagawa ◽  
...  
Keyword(s):  
Glassy Carbon ◽  
Carbon Electrodes ◽  
Glassy Carbon Electrodes

Electrochemical behaviour and preconcentration of uranyl(VI) at Nafion-coated glassy carbon electrodes

1992 ◽  
Vol 324 (1-2) ◽  
pp. 145-159 ◽  
Author(s):  
Paolo Ugo ◽  
Barbara Ballarin ◽  
Salvatore Daniele ◽  
G.Antonio Mazzocchin
Keyword(s):  
Glassy Carbon ◽  
Electrochemical Behaviour ◽  
Carbon Electrodes ◽  
Glassy Carbon Electrodes

scholarly journals Synthesis of Valeric Acid by Selective Electrocatalytic Hydrogenation of Biomass-Derived Levulinic Acid

Catalysts ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 692
Author(s):  
Yan Du ◽  
Xiao Chen ◽  
Ji Qi ◽  
Pan Wang ◽  
Changhai Liang
Keyword(s):  
Levulinic Acid ◽  
Active Sites ◽  
Valeric Acid ◽  
Future Research ◽  
Adsorbed Hydrogen ◽  
Electrocatalytic Hydrogenation ◽  
Ambient Conditions ◽  
Metallic Lead ◽  
Faradaic Efficiency ◽  
Lead Electrode

The electrocatalytic hydrogenation (ECH) of biomass-derived levulinic acid (LA) is a promising strategy to synthetize fine chemicals under ambient conditions by replacing the thermocatalytic hydrogenation at high temperature and high pressure. Herein, various metallic electrodes were investigated in the ECH of LA in a H-type divided cell. The effects of potential, electrolyte concentration, reactant concentration, and temperature on catalytic performance and Faradaic efficiency were systematically explored. The high conversion of LA (93%) and excellent “apparent” selectivity to valeric acid (VA) (94%) with a Faradaic efficiency of 46% can be achieved over a metallic lead electrode in 0.5 M H2SO4 electrolyte containing 0.2 M LA at an applied voltage of −1.8 V (vs. Ag/AgCl) for 4 h. The combination of adsorbed LA and adsorbed hydrogen (Hads) on the surface of the metallic lead electrode is key to the formation of VA. Interestingly, the reaction performance did not change significantly after eight cycles, while the surface of the metallic lead cathode became rough, which may expose more active sites for the ECH of LA to VA. However, there was some degree of corrosion for the metallic lead cathode in this strong acid environment. Therefore, it is necessary to improve the leaching-resistance of the cathode for the ECH of LA in future research.

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