Electrochemical catalytic activity of tungsten trioxide- modified graphite felt toward VO2+/VO2+ redox reaction

Shen, Yang; Xu, Hongyao; Xu, Ping; Wu, Xiaoxin; Dong, Yiming; Lu, Lu

doi:10.1016/j.electacta.2014.03.107

Cited by 94 publications

(63 citation statements)

References 18 publications

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“…Several transition metal oxide‐based electrocatalysts such as IrO 2 , Mn 3 O 4 , WO 3 , PbO 2 , and Nb 2 O 5 have been reported to improve the catalytic activity of vanadium redox couples due to low cost and abundant resources . In 1987, iridium oxide on a titanium electrode that is known as dimensionally stable anode (DSA) was first used by the group of Skyllas‐Kazacos.…”

Section: Metal‐based Electrocatalystsmentioning

confidence: 99%

“…WO3‐modified graphite felt was proposed to replace the noble metal catalyst and to improve the electrochemical performance of VRFBs. The sample was prepared by a hydrothermal process of Na 2 WO 4 ⋅2 H 2 O at 180 °C for 4 h . WO 3 nanoparticles were successfully coated on the graphite felt, showing a hexagonal structure with lattice parameters of a = b =7.2980 and c =3.8990.…”

Section: Metal‐based Electrocatalystsmentioning

confidence: 99%

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Nanostructured Electrocatalysts for All‐Vanadium Redox Flow Batteries

Park

Ryu

Cho

2015

Chemistry An Asian Journal

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Vanadium redox reactions have been considered as a key factor affecting the energy efficiency of the all-vanadium redox flow batteries (VRFBs). This redox reaction determines the reaction kinetics of whole cells. However, poor kinetic reversibility and catalytic activity towards the V(2+)/V(3+) and VO(2+)/VO2(+) redox couples on the commonly used carbon substrate limit broader applications of VRFBs. Consequently, modified carbon substrates have been extensively investigated to improve vanadium redox reactions. In this Focus Review, recent progress on metal- and carbon-based nanomaterials as an electrocatalyst for VRFBs is discussed in detail, without the intention to provide a comprehensive review on the whole components of the system. Instead, the focus is mainly placed on the redox chemistry of vanadium ions at a surface of various metals, different dimensional carbons, nitrogen-doped carbon nanostructures, and metal-carbon composites.

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Section: Metal‐based Electrocatalystsmentioning

confidence: 99%

Section: Metal‐based Electrocatalystsmentioning

confidence: 99%

Nanostructured Electrocatalysts for All‐Vanadium Redox Flow Batteries

Park

Ryu

Cho

2015

Chemistry An Asian Journal

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“…Hence, the research hotspot mainly focused on the development of stable anodes for removal of persistent organic pollutants by electrochemical oxidation 7,11 . In particular, anodes with low oxygen evolution overpotential, such as graphite 12 , RuO 2 13 , and Pt 14 permit only partial oxidation of organics, while anodes with high oxygen evolution overpotential, such as SnO 2 15 , PbO 2 16 , and BDD 17 , favor high potential for anodic oxidation of organic compounds. The first research focus is to explore novel anode materials.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of a novel porous Ti/SnO₂–Sb₂O₃–CNT/PbO₂electrode for the anodic oxidation of phenol wastewater

et al. 2015

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a Porous Ti/SnO2-Sb2O3-CNT/PbO2 electrodes were successfully fabricated using thermal decomposition technique and electro-deposition technologies. Characterization experiments including Scanning electron microscopy (SEM), Energydispersive spectroscopy (EDS), X-ray diffraction (XRD), Cyclic voltammertry (CV), Electrochemical Impedance Spectroscopy (EIS) and accelerated life time test was performed to evaluate the effect of CNT-doped SnO2-Sb2O3 intermediate layer on PbO2 electrode. The results showed that CNT could be doped into the SnO2-Sb2O3 intermediate layer by thermal decomposition. Compared with porous Ti/SnO2-Sb2O3 substrate, CNT-doped induced the substrate surface forming a fibrous structure, it means that porous Ti/SnO2-Sb2O3-CNT substrate would provide more active sites for PbO2 deposition and could make a compact and fine surface coating. Besides, the CNT modified electrode had higher active surface area and higher electrochemical activity than without CNT doped. The life of porous Ti/SnO2-Sb2O3-CNT/PbO2 (296h) was 1.38 times as much as that of porous Ti/SnO2-Sb2O3/PbO2 electrode (214h). Electro-catalytic oxidation of phenol in aqueous solution was studied to evaluate the electrochemical oxidation ability in environment science. Porous Ti/SnO2-Sb2O3-CNT/PbO2 electrode displayed not only excellent electro-catalytic performance but also low energy consumption using phenol as a model organic pollutant. The porous Ti/SnO2-Sb2O3-CNT/PbO2 electrode has higher kinetic rate constant and chemical oxygen demand (COD), which is 1.73 and 1.09 times those of the porous Ti/SnO2-Sb2O3/PbO2 electrode, respectively. Moreover, CNT-doped can further increase the hydroxyl radical (·OH) generation capacity. All these results illustrated that porous Ti/SnO2-Sb2O3-CNT/PbO2 electrode for pollutants degradation and had a great potential application.

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“…For example, MWCNTs [5], graphene nanosheets and carbon nanofibers [6,7], functionalization of carbon surface as N-and Ocontaining groups [8], metals such as Pt [6], Ir [9] and Bi [10] and metal oxides Mn 3 O 4 [11,12], WO 3 [13,14], TiO 2 [15], CeO 2 [16], PbO 2 [17], and Nb 2 O 5 [18] were deposited onto the CF supports to prepare modified electrodes. However, although all this research demonstrated an improvement in electrochemical kinetics, the enhanced power density is rarely discussed in the literature as a complementary performance evaluation to the charge/discharge experiments.…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

High-power positive electrode based on synergistic effect of N- and WO3 -decorated carbon felt for vanadium redox flow batteries

Hosseini

Mousavihashemi

Murcia-López

et al. 2018

Carbon

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Although Vanadium Redox Flow Battery (VRFB) is well suitable for grid-scale application, their power-related cost must be reduced in order to boost the technology to the market, allowing their widespread commercialization. One effective way to make the VRFB a competitive and viable solution could be through the new strategies for improving the electrocatalytic activity of the electrodes with enhanced electrolyte/electrode interface characteristics. The greatly effective and enhanced-electron transfer could increase the current density with the decrement of the stack size. Herein, we report the synergistic effect demonstrated by N-and WO 3 -decorated carbon-based positive electrode, named HTNW electrode, which demonstrates the feasibility of achieving: i) enhanced electrocatalytic activity, indicating high rate towards VO 2+ /VO 2 + couple (promotion of oxygen and electron transfer processes), ii) decrement of the electron-transfer resistance from 75.62 Ω to 12.4 Ω for the pristine electrode and HTNW electrodes, respectively; iii) 51% of the electrolyte utilization ratio at high rates (i.e. 200 mA cm -2 ) with 70% of energy efficiency ; iv) increment of more than 50% of the power-peak in comparison with HT electrode.

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Electrochemical catalytic activity of tungsten trioxide- modified graphite felt toward VO2+/VO2+ redox reaction

Cited by 94 publications

References 18 publications

Nanostructured Electrocatalysts for All‐Vanadium Redox Flow Batteries

Nanostructured Electrocatalysts for All‐Vanadium Redox Flow Batteries

Preparation and characterization of a novel porous Ti/SnO₂–Sb₂O₃–CNT/PbO₂electrode for the anodic oxidation of phenol wastewater

High-power positive electrode based on synergistic effect of N- and WO3 -decorated carbon felt for vanadium redox flow batteries

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Electrochemical catalytic activity of tungsten trioxide- modified graphite felt toward VO2+/VO2+ redox reaction

Cited by 94 publications

References 18 publications

Nanostructured Electrocatalysts for All‐Vanadium Redox Flow Batteries

Nanostructured Electrocatalysts for All‐Vanadium Redox Flow Batteries

Preparation and characterization of a novel porous Ti/SnO2–Sb2O3–CNT/PbO2electrode for the anodic oxidation of phenol wastewater

High-power positive electrode based on synergistic effect of N- and WO3 -decorated carbon felt for vanadium redox flow batteries

Contact Info

Product

Resources

About

Preparation and characterization of a novel porous Ti/SnO₂–Sb₂O₃–CNT/PbO₂electrode for the anodic oxidation of phenol wastewater