Glucose electro-oxidation on Pt(100) in phosphate buffer solution (pH 7): A mechanistic study

Mello, Gisele A.B.; Cheuquepán, William; Briega-Martos, Valentín; Feliú, Juan M.

doi:10.1016/j.electacta.2020.136765

Cited by 24 publications

(10 citation statements)

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“…The electrocatalysts play a key role in the electrochemical conversion of glucose . Precious metal-based electrocatalysts have been studied for electrochemical conversion of glucose. − Carbon-supported PtAu nanoparticles displayed a gluconate selectivity of 87% and a glucose conversion of 67% . Recently, transition-metal-based electrocatalysts have also been evaluated for glucose conversion owing to their abundance and low cost .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of NiO-, CuO-, and Co₃O₄-Decorated Carbon Nanotubes for Electrochemical Detection and Conversion of Glucose

Liu

Shen

2022

ACS Appl. Energy Mater.

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NiO, CuO, and Co3O4 nanoparticles supported by carbon nanotubes (CNTs) were synthesized for the electrochemical detection and conversion of glucose. The structures of the as-prepared catalysts were characterized by transmission electron microscopy, X-ray diffraction, Raman spectroscopy, and inductively coupled plasma-optical emission spectrometry. The electrochemical performance of the catalysts was evaluated by cyclic voltammetry, linear scanning voltammetry, electrochemical impedance spectroscopy, and chronoamperometry measurements. The optimal potentials of the resulting sensors were determined from the current response as obtained from the current–time tests. The minimum limit of detection (LOD), stability, reproducibility, and interference resistance of the sensors were evaluated. The resulting electrochemical sensors showed excellent sensitivity, stability, reproducibility, and interference resistance for the detection of glucose. In particular, the electrochemical sensor based on Co3O4/CNTs had an LOD of 2 μM in glucose concentrations ranging from 0.004 to 0.474 mM. The products of glucose oxidation at potentials of 1.466, 1.666, and 1.866 V with varying electrolysis times of 1, 2, 4, and 6 h, respectively, were analyzed using high-performance liquid chromatography. Five compounds including glucuronic acid (GNA), glucuronic acid, formic acid, oxalic acid, and ethanoic acid were detected. After 4 h electrolysis at 1.666 V, the glucose conversions resulting from NiO/CNTs, CuO/CNTs, and Co3O4/CNTs were 56.5, 43.2, and 53.9%, respectively. Notably, Co3O4/CNTs yielded the highest GNA selectivity of 46.8%. In contrast, NiO/CNTs and CuO/CNTs tended to produce more C1 and C2 compounds.

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Section: Introductionmentioning

confidence: 99%

Synthesis of NiO-, CuO-, and Co₃O₄-Decorated Carbon Nanotubes for Electrochemical Detection and Conversion of Glucose

Liu

Shen

2022

ACS Appl. Energy Mater.

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“…However, backward peaks are not observed in Figure 4C,D. This phenomenon could be attributed to the fact that direct conversion of glucose molecules to gluconic acid over Ru/CNT catalysts surface led to absence of backward peaks 37‐39 . As seen in Table 2, all Ru/CNT catalysts exhibited activity at low potentials.…”

Section: Resultsmentioning

confidence: 88%

Highly active carbon nanotube supported iridium, copper, ruthenium catalysts for glucose electrooxidation

Kıvrak

2021

Energy Storage

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Herein, carbon nanotube (CNT) supported ruthenium (Ru), iridium (Ir), and copper (Cu) catalysts at 0.1 to 20 wt% metal loading are prepared by the NaBH4 reduction method for glucose electrooxidation reaction (GER). These catalysts are successfully characterized by X‐ray diffraction, scanning electron microscope, and N2 adsorption‐desorption measurements. Voltammetric measurements of these catalysts are taken using cyclic voltammetry and chronoamperometry techniques. The crystallite sizes of these catalysts are calculated as 2.53 nm for Ru/CNT, 2.94 nm for Ir/CNT, and 13.06 nm for Cu/CNT by using Scherrer equation. For GER, 10% Ru/CNT, 0.1% Ir/CNT, and 0.5% Cu/CNT catalysts have high current densities as 1.86 mA cm−2 (160.6 mA mg−1 Ru), 3.03 mA cm−2 (23 857.2 mA mg−1 Ir), and 1.12 mA cm−2 (1768.8 mA mg−1 Cu), respectively. These catalysts have also good stability. Results reveal that 10% Ru/CNT, 0.1% Ir/CNT, and 0.5% Cu/CNT catalysts are promising catalysts as direct glucose fuel cell anode catalysts.

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“…When we did not add glucose to the anolyte (CO 2 RR-OER), the electrolyser delivered a current density of 94 mA cm −2 at a full-cell voltage of 3 V. At 100 mA cm −2 , when we introduced glucose, increasing its concentration in the anolyte from 0.1 to 0.5 M and 1 M, the full-cell voltage decreased from 2.90 to 2.18 V and 2.23 V. The full-cell voltages at glucose concentrations 0.5 M and 1 M are rather close to one another: this we attribute to the electrokinetic limitations of the anode 42 : at 0.5 M, glucose molecules saturate the active sites of the Pt catalyst, and, as a result, increasing the concentration to 1 M does not enable further reduction in the cell voltage. A further increase in the glucose concentration to 2 M increased full-cell voltage, i.e., 2.40 V at 100 mA cm −2 due to the excess coverage of Pt with glucose and oxidation intermediates 43 . We thus adopted 1 M glucose for the performance investigations.…”

Section: Resultsmentioning

confidence: 99%

Eliminating the need for anodic gas separation in CO2 electroreduction systems via liquid-to-liquid anodic upgrading

Xie

Ozden²,

Miao³

et al. 2022

Nat Commun

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Electrochemical reduction of CO2 to multi-carbon products (C2+), when powered using renewable electricity, offers a route to valuable chemicals and fuels. In conventional neutral-media CO2-to-C2+ devices, as much as 70% of input CO2 crosses the cell and mixes with oxygen produced at the anode. Recovering CO2 from this stream adds a significant energy penalty. Here we demonstrate that using a liquid-to-liquid anodic process enables the recovery of crossed-over CO2 via facile gas-liquid separation without additional energy input: the anode tail gas is directly fed into the cathodic input, along with fresh CO2 feedstock. We report a system exhibiting a low full-cell voltage of 1.9 V and total carbon efficiency of 48%, enabling 262 GJ/ton ethylene, a 46% reduction in energy intensity compared to state-of-art single-stage CO2-to-C2+ devices. The strategy is compatible with today’s highest-efficiency electrolyzers and CO2 catalysts that function optimally in neutral and alkaline electrolytes.

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Glucose electro-oxidation on Pt(100) in phosphate buffer solution (pH 7): A mechanistic study

Cited by 24 publications

References 50 publications

Synthesis of NiO-, CuO-, and Co₃O₄-Decorated Carbon Nanotubes for Electrochemical Detection and Conversion of Glucose

Synthesis of NiO-, CuO-, and Co₃O₄-Decorated Carbon Nanotubes for Electrochemical Detection and Conversion of Glucose

Highly active carbon nanotube supported iridium, copper, ruthenium catalysts for glucose electrooxidation

Eliminating the need for anodic gas separation in CO2 electroreduction systems via liquid-to-liquid anodic upgrading

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Glucose electro-oxidation on Pt(100) in phosphate buffer solution (pH 7): A mechanistic study

Cited by 24 publications

References 50 publications

Synthesis of NiO-, CuO-, and Co3O4-Decorated Carbon Nanotubes for Electrochemical Detection and Conversion of Glucose

Synthesis of NiO-, CuO-, and Co3O4-Decorated Carbon Nanotubes for Electrochemical Detection and Conversion of Glucose

Highly active carbon nanotube supported iridium, copper, ruthenium catalysts for glucose electrooxidation

Eliminating the need for anodic gas separation in CO2 electroreduction systems via liquid-to-liquid anodic upgrading

Contact Info

Product

Resources

About

Synthesis of NiO-, CuO-, and Co₃O₄-Decorated Carbon Nanotubes for Electrochemical Detection and Conversion of Glucose

Synthesis of NiO-, CuO-, and Co₃O₄-Decorated Carbon Nanotubes for Electrochemical Detection and Conversion of Glucose