Cobalt valence modulating in CoO  incorporated carbon nanofiber for enhanced glucose electrooxidation

Hu, Jiadong; Lu, Hao; Li, Mingsong; Xiao, Gang; Li, Min; Xiang, Xuemei; Lu, Zhisong; Qiao, Yan

doi:10.1016/j.matre.2022.100091

Cited by 3 publications

(3 citation statements)

References 47 publications

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“…The curve’s sensitivity is 0.459 μA/ppm; the coefficient of determination ( R 2 ) is 99.49%; and the detection limit is 4.955 ppm. In Figure l, Co(II) oxidizes to Co(III) near +0.1 V and further oxidizes to Co(IV) near +0.4 V while catalyzing the oxidation of glucose . Hence, the oxidation peak current near +0.4 V increases with a rising glucose concentration.…”

Section: Resultsmentioning

confidence: 96%

“…In Figure 2 l, Co(II) oxidizes to Co(III) near +0.1 V and further oxidizes to Co(IV) near +0.4 V while catalyzing the oxidation of glucose. 40 Hence, the oxidation peak current near +0.4 V increases with a rising glucose concentration. Figure 2 j illustrates the calibration curve of peak current and glucose concentration with a sensitivity of 0.234 μA/ppm, a coefficient of determination ( R 2 ) of 99.46%, and a detection limit of 4.217 ppm.…”

Section: Resultsmentioning

confidence: 96%

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Simultaneous Determination of Chemical Oxygen Demand, Total Nitrogen, Ammonia, and Phosphate in Surface Water Based on a Multielectrode System

Jiang,

Liu,

Jiang

et al. 2024

ACS Omega

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A technique for monitoring chemical oxygen demand (COD), total nitrogen (TN), ammonia (N-NH 4 ), and phosphate (P-PO 4 ) in surface water with a targeted signal multielectrode system (Cu, Ir, Rh, Co(OH) 2 , and Zr(OH) 4 electrodes) is proposed for the first time. Each water quality index is specifically detected by at least two electrodes with distinct selectivity sensing mechanisms. Cyclic voltammetry and electrochemical impedance measurements are employed for multidimensional signal acquisition, complemented by normalization and Least Absolute Shrinkage and Selection Operator (LASSO) for principal feature extraction and dimension reduction. Multiple linear regression (MLR), partial least-squares (PLS), and eXtreme Gradient Boosting (XGBoost) were employed to evaluate the established prediction model. The precisions of the multielectrode system are ±10%/±5 ppm of COD, ±10%/±0.2 ppm of TN, ±5%/±0.1 ppm of N-NH 4 , and ±5%/±0.01 ppm of P-PO 4 . The analysis time of the multielectrode system is reduced from hours to minutes compared with traditional analysis, without any sample pretreatment, facilitating continuous online monitoring in the field. The developed multielectrode system offers a feasible strategy for online in situ monitoring of surface water quality.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 96%

Simultaneous Determination of Chemical Oxygen Demand, Total Nitrogen, Ammonia, and Phosphate in Surface Water Based on a Multielectrode System

Jiang,

Liu,

Jiang

et al. 2024

ACS Omega

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“…Carbon materials have attracted wide attention in the field of electromagnetic shielding due to their strong conductivity, structural diversity, high stability, light weight and other characteristics [ 18 , 19 , 20 ]. Graphene, carbon fiber, carbon nanotubes, carbon foam and other new carbon materials have been used in EMI shielding research, but these new carbon materials still have the problem of high cost [ 21 , 22 , 23 , 24 ]. Therefore, the development of natural and renewable carbon materials will solve the above problems.…”

Section: Introductionmentioning

confidence: 99%

High Value Utilization of Waste Wood toward Porous and Lightweight Carbon Monolith with EMI Shielding, Heat Insulation and Mechanical Properties

Han

et al. 2023

Molecules

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With the increasing pollution of electromagnetic (EM) radiation, it is necessary to develop low-cost, renewable electromagnetic interference (EMI) shielding materials. Herein, wood-derived carbon (WC) materials for EMI shielding are prepared by one-step carbonization of renewable wood. With the increase in carbonization temperature, the conductivity and EMI performance of WC increase gradually. At the same carbonization temperature, the denser WC has better conductivity and higher EMI performance. In addition, due to the layered superimposed conductive channel structure, the WC in the vertical-section shows better EMI shielding performance than that in the cross-section. After excluding the influence of thickness and density, the specific EMI shielding effectiveness (SSE/t) value can be calculated to further optimize tree species. We further discuss the mechanism of the influence of the microstructure of WC on its EMI shielding properties. In addition, the lightweight WC EMI material also has good hydrophobicity and heat insulation properties, as well as good mechanical properties.

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Synergistic Effect of Cobalt/Ferrocene as a Catalyst for the Oxygen Evolution Reaction

Abad,

Duprat-Alvaro,

Sainz

et al. 2024

J. Phys. Chem. Lett.

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There is a great deal of interest in the development of electrocatalysts for the oxygen evolution reaction (OER) that are stable and have high activity because this anodic half-reaction is the main bottleneck in water splitting and other key technologies. Cobalt and iron oxide and oxyhydroxide electrocatalysts constitute a cheaper alternative to the highly active and commonly used Ir-and Ru-based catalysts. Most of the described electrocatalysts require tedious synthetic and expensive preparation procedures. We report here a facile and straightforward preparation of an electrocatalyst by a combination of commercial compounds, such as cobalt chloride and ferrocene. A highly active and stable OER electrocatalyst is obtained, which shows a low overpotential in the alkaline medium as a consequence of a synergistic effect between both compounds and is inexpensive.

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Cobalt valence modulating in CoO incorporated carbon nanofiber for enhanced glucose electrooxidation

Cited by 3 publications

References 47 publications

Simultaneous Determination of Chemical Oxygen Demand, Total Nitrogen, Ammonia, and Phosphate in Surface Water Based on a Multielectrode System

Simultaneous Determination of Chemical Oxygen Demand, Total Nitrogen, Ammonia, and Phosphate in Surface Water Based on a Multielectrode System

High Value Utilization of Waste Wood toward Porous and Lightweight Carbon Monolith with EMI Shielding, Heat Insulation and Mechanical Properties

Synergistic Effect of Cobalt/Ferrocene as a Catalyst for the Oxygen Evolution Reaction

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