Photochemical Green Synthesis of Nanostructured Cobalt Oxides as Hydrogen Peroxide Redox for Bifunctional Sensing Application

Su, C. H.; Lan, Wenjie; Chu, Chieh-Yu; Liu, Xiaojie; Kao, Wei-Yao; Chen, Chun‐Hu

doi:10.1016/j.electacta.2015.12.092

Cited by 26 publications

(8 citation statements)

References 43 publications

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“…Indeed, as reported by Kuo et al for mixed-valence CoMn oxides, the presence of multivalent species, i.e., Co(II)/Co(III) and Mn(III)/Mn(IV), contributes to the electrocatalytic performance in H 2 O 2 reduction. Similarly, Su et al have shown that nanostructured cobalt oxides, photochemically synthesized, exhibit an electrocatalytic activity in both H 2 O 2 oxidation and reduction. In both cases, the electrocatalytic performance seems to be highly associated with the formation of hierarchical nanostructures with a specific elemental composition.…”

Section: Resultsmentioning

confidence: 87%

Insights into the Structure and the Electrochemical Reactivity of Cobalt-Manganese Layered Double Hydroxides: Application to H₂O₂ Sensing

et al. 2020

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A series of Co R Mn-LDH (R = 1, 2, 3, 4, 5) was synthesized by the coprecipitation method. The formation of layered double hydroxides (LDH) phases is confirmed by powder X-ray diffraction (XRD) and infrared spectroscopy (FTIR). The energy dispersive X-ray analysis (EDX) shows the total coprecipitation of Co and Mn. The X-ray photoelectron spectroscopy (XPS) gives evidence of the joint presence of Co(II), Co(III) and Mn(III) in the LDH structures in proportion depending on the initial R value. The Rietveld refinement of the structure using the XRD data reveals that the sample with a CoMn ratio 3:1 displays a pure LDH phase containing mainly Co(II) and Mn(III) with a M(II)/M(III) of nearly 2.1, in agreement with the X-ray absorption spectroscopy (XAS) results at the Co and Mn K-edges, strong hydrogen bonding network involving CO 3 2-/OHcharge compensating anions in the interlayers. When compared with the other Co R Mn-LDH, the Co 3 Mn-LDH displays the best redox properties in an alkaline medium (0.1 M NaOH) and in a neutral pH (Tris buffer). An indepth study of the Co 3 Mn-LDH obtained after electrochemical oxidation was also performed. The evolution of Co and Mn oxidation state under electrochemical oxidation were evidenced by XPS. Finally, the performance of the Co 3 Mn-LDH modified electrode was determined for the electrocatalytic detection of hydrogen peroxide.

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Section: Resultsmentioning

confidence: 87%

Insights into the Structure and the Electrochemical Reactivity of Cobalt-Manganese Layered Double Hydroxides: Application to H₂O₂ Sensing

et al. 2020

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“…Recently, two peaks together as a bifunctional sensor has contribute to more sensitive qualitative and quantitative detection. [80] To clarify the mechanism of electrochemical reduction and oxidation of H 2 O 2 , the catalytic performance was explored using methods including cyclic voltammetry, rotating disk electrode experiments, surface-enhanced Raman spectroscopy, theoretical calculations (DFT, ab initio, etc), et al [81,82] Though there might be other uncovered approach, [83] recent reaction mechanism based on metal catalysts confirms the OH ads intermediate with experimental and theoretical evidence. [84][85][86] The reduction and oxidation mechanisms of H 2 O 2 on metal catalyst in acid and base could be briefly described as Equations (5)- (7) and (8)-(10), respectively, with OH ads formation as an important step.…”

Section: Electrochemical Detection Of Hydrogen Peroxidementioning

confidence: 99%

“…But both peaks are reasonable when no interference exists. Recently, two peaks together as a bifunctional sensor has contribute to more sensitive qualitative and quantitative detection …”

Section: Introductionmentioning

confidence: 99%

Free‐Standing 3D Electrodes for Electrochemical Detection of Hydrogen Peroxide

et al. 2019

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Electrochemical detection of hydrogen peroxide has achieved rapid development, due to the wide presence in industrial production, everyday life, bioprocess and green energy chemistry, etc. Many three‐dimensional structures have emerged as state‐of‐the‐art electrocatalysts due to their fascinating structures and electrochemical properties. This review summarizes free‐standing three‐dimensional electrocatalysts based on metal, metal oxide, carbon & silicon, and unconventional materials for detection of hydrogen peroxide with low limit of detection, wide range and fast response. The work also highlights their applications in near neutral conditions, especially their ability for single cell detection and mapping in biological environment. Further exploration into these materials together with devices design will facilitate the development of next‐generation detection technologies toward in situ and real‐time detection and contribute to wearable/portable smart detection electronics.

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“…The TEM findings nevertheless confirmed observations made during SEM examination of the samples. Size-controlled synthesis of cobalt and cobalt oxide nanoparticles over Nafion membranes and the Co–C based nanocomposites can be explored for diverse applications including proton exchange membrane fuel cells, catalysis, supercapacitors, sensors, and batteries [ 34 , 42 , 43 , 44 , 45 , 46 , 47 ].…”

Section: Resultsmentioning

confidence: 99%

Metal/Carbon Hybrid Nanostructures Produced from Plasma-Enhanced Chemical Vapor Deposition over Nafion-Supported Electrochemically Deposited Cobalt Nanoparticles

et al. 2018

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In this work, we report development of hybrid nanostructures of metal nanoparticles (NP) and carbon nanostructures with strong potential for catalysis, sensing, and energy applications. First, the etched silicon wafer substrates were passivated for subsequent electrochemical (EC) processing through grafting of nitro phenyl groups using para-nitrobenzene diazonium (PNBT). The X-ray photoelectron spectroscope (XPS) and atomic force microscope (AFM) studies confirmed presence of few layers. Cobalt-based nanoparticles were produced over dip or spin coated Nafion films under different EC reduction conditions, namely CoSO4 salt concentration (0.1 M, 1 mM), reduction time (5, 20 s), and indirect or direct EC reduction route. Extensive AFM examination revealed NP formation with different attributes (size, distribution) depending on electrochemistry conditions. While relatively large NP with >100 nm size and bimodal distribution were obtained after 20 s EC reduction in H3BO3 following Co2+ ion uptake, ultrafine NP (<10 nm) could be produced from EC reduction in CoSO4 and H3BO3 mixed solution with some tendency to form oxides. Different carbon nanostructures including few-walled or multiwalled carbon nanotubes (CNT) and carbon nanosheets were grown in a C2H2/NH3 plasma using the plasma-enhanced chemical vapor deposition technique. The devised processing routes enable size controlled synthesis of cobalt nanoparticles and metal/carbon hybrid nanostructures with unique microstructural features.

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Photochemical Green Synthesis of Nanostructured Cobalt Oxides as Hydrogen Peroxide Redox for Bifunctional Sensing Application

Cited by 26 publications

References 43 publications

Insights into the Structure and the Electrochemical Reactivity of Cobalt-Manganese Layered Double Hydroxides: Application to H₂O₂ Sensing

Insights into the Structure and the Electrochemical Reactivity of Cobalt-Manganese Layered Double Hydroxides: Application to H₂O₂ Sensing

Free‐Standing 3D Electrodes for Electrochemical Detection of Hydrogen Peroxide

Metal/Carbon Hybrid Nanostructures Produced from Plasma-Enhanced Chemical Vapor Deposition over Nafion-Supported Electrochemically Deposited Cobalt Nanoparticles

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Photochemical Green Synthesis of Nanostructured Cobalt Oxides as Hydrogen Peroxide Redox for Bifunctional Sensing Application

Cited by 26 publications

References 43 publications

Insights into the Structure and the Electrochemical Reactivity of Cobalt-Manganese Layered Double Hydroxides: Application to H2O2 Sensing

Insights into the Structure and the Electrochemical Reactivity of Cobalt-Manganese Layered Double Hydroxides: Application to H2O2 Sensing

Free‐Standing 3D Electrodes for Electrochemical Detection of Hydrogen Peroxide

Metal/Carbon Hybrid Nanostructures Produced from Plasma-Enhanced Chemical Vapor Deposition over Nafion-Supported Electrochemically Deposited Cobalt Nanoparticles

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Insights into the Structure and the Electrochemical Reactivity of Cobalt-Manganese Layered Double Hydroxides: Application to H₂O₂ Sensing

Insights into the Structure and the Electrochemical Reactivity of Cobalt-Manganese Layered Double Hydroxides: Application to H₂O₂ Sensing