scholarly journals Electro-Oxidation of Glucose in Alkaline Media on Graphene Sheets Decorated with Gold Nanoparticles

2013 ◽  
Vol 04 (02) ◽  
pp. 162-169 ◽  
Author(s):  
Marek Wojnicki ◽  
Magdalena Luty-Błocho ◽  
Iwona Dobosz ◽  
Justyna Grzonka ◽  
Krzysztof Pacławski ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Alkaline Media ◽  
Graphene Sheets ◽  
Electro Oxidation ◽  
Oxidation Of Glucose

scholarly journals Investigation of electro-oxidation of glucose at gold nanoparticles/carbon composites prepared in the presence of halide ions

Chemija ◽  
2020 ◽  
Vol 31 (4) ◽  
Author(s):  
Daina Upskuvienė ◽  
Dijana Šimkūnaitė ◽  
Jūratė Vaičiūnienė ◽  
Virginija Kepenienė ◽  
Algirdas Selskis ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Inductively Coupled Plasma ◽  
Chemical Reduction ◽  
Complex Mixture ◽  
Reducing Agents ◽  
Oxidation Potential ◽  
Carbon Powder ◽  
Halide Ions ◽  
Electro Oxidation ◽  
Oxidation Of Glucose

In this study, the carbon powder supported gold nanoparticles composites (AuNPs/C) were prepared via the chemical reduction method by employing sodium citrate or a complex mixture of glucose and ascorbic acid as reducing agents in the presence of small amounts of different halide ions (Cl–, Br–, I–). The electrocatalytic activity of the synthesized composites was evaluated for the electro-oxidation of glucose in an alkaline medium using cyclic voltammetry, whereas the morphology and composition of composites were characterized using field emission scanning electron microscopy and inductively coupled plasma optical emission spectroscopy. The electrochemical measurements demonstrate the enhanced electrocatalytic performance of the AuNPs/C composites prepared by the help of different reducing agents coupled with halide ions for the electro-oxidation of glucose as compared to that of composites that were synthesized by the use only of the reducing agents barely. The AuNPs/C composites synthesized with the presence of KCl, KBr or KI additive in the reaction mixture generate the increased glucose electro-oxidation current density values; furthermore, the glucose electro-oxidation potential is shifted to more negative values as compared to those obtained on the synthesized composites without halide additive.

Microwave activation of the electro-oxidation of glucose in alkaline media

2005 ◽  
Vol 7 (20) ◽  
pp. 3552 ◽  
Author(s):  
Mohamed A. Ghanem ◽  
Richard G. Compton ◽  
Barry A. Coles ◽  
Antonio Canals ◽  
Anne Vuorema ◽  
...  
Keyword(s):  
Alkaline Media ◽  
Microwave Activation ◽  
Electro Oxidation ◽  
Oxidation Of Glucose

scholarly journals Catalytic activity of gold nanoparticles deposited on N-doped carbon-based supports in oxidation of glucose and arabinose mixtures

2021 ◽  
Author(s):  
Sebastian Franz ◽  
Nataliya D. Shcherban ◽  
Igor Bezverkhyy ◽  
Sergii A. Sergiienko ◽  
Irina L. Simakova ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Glucose Oxidation ◽  
Glucuronic Acid ◽  
Carbon Surface ◽  
Carbon Supports ◽  
Constant Ph ◽  
Oxidation Of Glucose ◽  
Mesoporous Structures ◽  
Carbon Based

AbstractOxidation of a mixture of glucose and arabinose over Au particles deposited on porous carbons, N-doped carbons and carbon nitrides was investigated at 70 °C, under constant pH of 8, and oxygen partial pressure 0.125 atm. In particular, Au deposited on nitrogen-containing carbon-based mesoporous structures demonstrated activity in the oxidation of the sugars to the corresponding aldonic acids higher than gold deposited on undoped carbon supports (conversion of glucose up to ca. 60%, arabinose–ca. 30% after 200 min). The results can be explained by the basic nature of the supports leading to an increase in the polarity of the carbon surface and the oxygen activation. Glucuronic acid (with selectivity ca. 10–93.5%) together with gluconic acid was formed as a result of glucose oxidation, while arabinose was selectively oxidized to arabinonic acid.

scholarly journals Developments of the Electroactive Materials for Non-Enzymatic Glucose Sensing and Their Mechanisms

Electrochem ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 347-389
Author(s):  
Wan-Ting Chiu ◽  
Tso-Fu Mark Chang ◽  
Masato Sone ◽  
Hideki Hosoda ◽  
Agnès Tixier-Mita ◽  
...  
Keyword(s):  
Glucose Sensing ◽  
Electrochemical Technique ◽  
Current Response ◽  
Metallic Materials ◽  
Metallic Oxide ◽  
Electroactive Materials ◽  
Metal Metal ◽  
Metal Derivatives ◽  
Electro Oxidation ◽  
Oxidation Of Glucose

A comprehensive review of the electroactive materials for non-enzymatic glucose sensing and sensing devices has been performed in this work. A general introduction for glucose sensing, a facile electrochemical technique for glucose detection, and explanations of fundamental mechanisms for the electro-oxidation of glucose via the electrochemical technique are conducted. The glucose sensing materials are classified into five major systems: (1) mono-metallic materials, (2) bi-metallic materials, (3) metallic-oxide compounds, (4) metallic-hydroxide materials, and (5) metal-metal derivatives. The performances of various systems within this decade have been compared and explained in terms of sensitivity, linear regime, the limit of detection (LOD), and detection potentials. Some promising materials and practicable methodologies for the further developments of glucose sensors have been proposed. Firstly, the atomic deposition of alloys is expected to enhance the selectivity, which is considered to be lacking in non-enzymatic glucose sensing. Secondly, by using the modification of the hydrophilicity of the metallic-oxides, a promoted current response from the electro-oxidation of glucose is expected. Lastly, by taking the advantage of the redistribution phenomenon of the oxide particles, the usage of the noble metals is foreseen to be reduced.

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