Co−doped stannates ⁄reduced graphene composites: Effect of cobalt substitution on the electrochemical sensing of hydrogen peroxide

Venegas, Constanza J.; Yedinak, Emily; Marco, José F.; Bollo, Soledad; Ruíz-León, Domingo

doi:10.1016/j.snb.2017.04.154

Cited by 16 publications

(7 citation statements)

References 44 publications

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“…In recent years, there has been increasing interest in the use of hybrid materials combining inorganic oxides and graphene, specifically for the electrochemical detection of hydrogen peroxide, with studies focusing on Co 2 SnO 4 /RGO [36], Pt-CeO 2 /graphene oxide [37], Ni x Co 3−x N/nitrogen-doped graphene [38], and RGO-SnO 2 [39]. The rapid and accurate determination of hydrogen peroxide has an important role in the electron transfer process of hundreds of enzymes in biological systems [40] connected with the oxidation of by-products of glutamate, oxalate, cholesterol, D-amino acid, urate, lactate, lysine, and glucose, as well as in various types of industries, such as paper, textile, pharmaceutical, and environmental industries [41].…”

Section: Introductionmentioning

confidence: 99%

Co2TiO4/Reduced Graphene Oxide Nanohybrids for Electrochemical Sensing Applications

et al. 2019

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For the first time, the synthesis, characterization, and analytical application for hydrogen peroxide quantification of the hybrid materials of Co2TiO4 (CTO) and reduced graphene oxide (RGO) is reported, using in situ (CTO/RGO) and ex situ (CTO+RGO) preparations. This synthesis for obtaining nanostructured CTO is based on a one-step hydrothermal synthesis, with new precursors and low temperatures. The morphology, structure, and composition of the synthesized materials were examined using scanning electron microscopy, X-ray diffraction (XRD), neutron powder diffraction (NPD), and X-ray photoelectron spectroscopy (XPS). Rietveld refinements using neutron diffraction data were conducted to determine the cation distributions in CTO. Hybrid materials were also characterized by Brunauer–Emmett–Teller adsorption isotherms, Scanning Electron microscopy, and scanning electrochemical microscopy. From an analytical point of view, we evaluated the electrochemical reduction of hydrogen peroxide on glassy carbon electrodes modified with hybrid materials. The analytical detection of hydrogen peroxide using CTO/RGO showed 11 and 5 times greater sensitivity in the detection of hydrogen peroxide compared with that of pristine CTO and RGO, respectively, and a two-fold increase compared with that of the RGO+CTO modified electrode. These results demonstrate that there is a synergistic effect between CTO and RGO that is more significant when the hybrid is synthetized through in situ methodology.

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Section: Introductionmentioning

confidence: 99%

Co2TiO4/Reduced Graphene Oxide Nanohybrids for Electrochemical Sensing Applications

et al. 2019

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“…In a previous work, we report for the first time an amperometric non‐enzymatic sensor based on the catalytic activity of cobalt‐doped stannates/reduced graphene oxide (rGO) composites towards the oxidation of hydrogen peroxide. The catalytic activity of composites was highly dependent on quantity of cobalt in the ceramic compound, and also on the proportion of rGO present .…”

Section: Figurementioning

confidence: 99%

“…Co 2 SnO 4 synthesis was prepared and characterized according to our previous reported method . Fresh stock dispersions of 8 mg/mL CTO and 2 mg/mL CNT (Nano Lab, >95 % purity, length 1–5 μm, diameter 15±5 nm) were prepared the same day of experimentation.…”

Section: Figurementioning

confidence: 99%

Co₂SnO₄/Carbon Nanotubes Composites: A Novel Approach for Electrochemical Sensing of Hydrogen Peroxide

et al. 2017

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For the first time Co 2 SnO 4 (CTO)/Carbon nanotubes (CNT) composites were prepared and used to modify glassy carbon electrodes for the amperometric determination of hydrogen peroxide. The catalytic activity of composites towards the oxidation of hydrogen peroxide was dependent on the quantity of CNT present in the composite and to the pH of the medium. The pure cobalt stannate phase with a ratio of 3 : 1 (CTO:CNT) exhibited the best catalytic activity towards hydrogen peroxide oxidation at low potentials (0.200 and 0.500 V). A linear relationship between current and hydrogen peroxide concentration was obtained with a sensitivity of 95 and 258 mA mM À1 and a detection limit of 0.130 and 0.08 mM respectively.

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“…Furthermore, the composite formed by incorporating low quantities of carbon-based materials with an inorganic compound improved the thermal and electrical conductivity and/or mechanical strength of the prepared composites. Accordingly, Co-based stannate cubical nanostructures prone to being stabilized by 2-D g-CN nanosheets have been studied for the first time to explore their interfacial properties, where Co 2 SnO 4 /g-C 3 N 4 (CoSnOCN) permits strong coupling, facilitating rapid and reversible transfer of electrons to allow excellent performances as bifunctional electrocatalysts for HER, OER, and overall water splitting. − Thereby, we have attempted to synthesize hybrid nanostructured CoSnOCN by varying the weight percentage of g-CN (5, 10, and 15%) via a simple one-pot and easily scalable in situ hydrothermal method to incorporate the properties of having a high active surface area with enhanced cubical structure edge sites to alter its catalytic activity. Eventually, the electrical conductivity, electrocatalytic activity, and durability of HER, OER, and overall water splitting would be discussed and compared with their counterparts.…”

Section: Introductionmentioning

confidence: 99%

Layered Porous Graphitic Carbon Nitride Stabilized Effective Co₂SnO₄ Inverse Spinel as a Bifunctional Electrocatalyst for Overall Water Splitting

2022

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Developing an efficient, low-cost, and non-noble metal oxide-based nanohybrid material for overall water splitting is a highly desirable approach to promote clean energy harnessing and to minimize environmental issues. Accordingly, we proposed an interfacial engineering approach to construct layered porous graphitic carbon nitride (g-C3N4)-stabilized Co2SnO4 inverse spinel nanohybrid materials as highly active bifunctional electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in an alkaline medium. Here, a Co2SnO4/g-C3N4 nanohybrid with a layered porous g-C3N4 stabilized cubelike inverse spinel has been synthesized with an enhanced surface area via a simple one-pot hydrothermal method. Besides, detailed structural and morphological characterizations were carried out using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission-scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), Fourier transform infrared (FT-IR), and Brunauer–Emmett–Teller (BET) analysis. Briefly, XPS analysis has revealed the existence of a strong coupling bond at the interface between a definite proportion of g-C3N4 nanosheets and the inverse spinel, which act as an electron transport channel to explore the exceptional performances for HER and OER. Compared to the Co2SnO4 inverse spinel lattice or g-C3N4 nanosheets, the prepared Co2SnO4/g-C3N4 nanohybrid-loaded 316 SSL mesh electrode showed excellent and stable electrocatalytic performances with very low overpotentials of 41 mV for HER and 260 mV for OER to reach the current density of 10 mA cm–2. To understand the electrocatalytic phenomena, the faradic efficiency was calculated for the prepared bifunctional electrocatalyst as 96%, which effectively would favor water electrolysis. Accordingly, the Co2SnO4/g-C3N4 nanohybrid-loaded electrodes were constructed, and the minimum cell voltage was found to be 1.52 V to reach the current density of 10 mA cm–2, which is comparable to the standard RuO2∥Pt/C in two-electrode systems. Thus, the developed nanohybrid-based electrocatalyst could be an alternative to noble metal-centered systems for highly efficient overall water splitting.

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Co−doped stannates ⁄reduced graphene composites: Effect of cobalt substitution on the electrochemical sensing of hydrogen peroxide

Cited by 16 publications

References 44 publications

Co2TiO4/Reduced Graphene Oxide Nanohybrids for Electrochemical Sensing Applications

Co2TiO4/Reduced Graphene Oxide Nanohybrids for Electrochemical Sensing Applications

Co₂SnO₄/Carbon Nanotubes Composites: A Novel Approach for Electrochemical Sensing of Hydrogen Peroxide

Layered Porous Graphitic Carbon Nitride Stabilized Effective Co₂SnO₄ Inverse Spinel as a Bifunctional Electrocatalyst for Overall Water Splitting

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Co−doped stannates ⁄reduced graphene composites: Effect of cobalt substitution on the electrochemical sensing of hydrogen peroxide

Cited by 16 publications

References 44 publications

Co2TiO4/Reduced Graphene Oxide Nanohybrids for Electrochemical Sensing Applications

Co2TiO4/Reduced Graphene Oxide Nanohybrids for Electrochemical Sensing Applications

Co2SnO4/Carbon Nanotubes Composites: A Novel Approach for Electrochemical Sensing of Hydrogen Peroxide

Layered Porous Graphitic Carbon Nitride Stabilized Effective Co2SnO4 Inverse Spinel as a Bifunctional Electrocatalyst for Overall Water Splitting

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Product

Resources

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Co₂SnO₄/Carbon Nanotubes Composites: A Novel Approach for Electrochemical Sensing of Hydrogen Peroxide

Layered Porous Graphitic Carbon Nitride Stabilized Effective Co₂SnO₄ Inverse Spinel as a Bifunctional Electrocatalyst for Overall Water Splitting