Oxygen and chlorine evolution on RuO2+TiO2+CeO2+Nb2O5 mixed oxide electrodes

Santana, Mário H.P.; Faria, Luiz A. De

doi:10.1016/j.electacta.2005.09.050

Cited by 90 publications

(69 citation statements)

References 31 publications

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“…In a lower anodic potential region, the relationship between the log J and E a À IR was governed by a linear Tafel equation, with a slope of 228 mV per decade independent of the [Cl À ]. The magnitude of the Tafel slope, which has been used to elucidate the rate determining step (RDS) in a multi-step reaction sequence, 24,25,38 suggests that the formation of MO x (_OH) (eqn (1)) would be the RDS with a charge transfer coefficient around 0.25. The a-phase Bi 2 O 3 is known to have one quarter of an oxide vacancy per unit cell.…”

Section: Electrochemistry Of the Bio X /Tio 2 Anode In Dilute Chloridmentioning

confidence: 99%

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Electrochemical treatment of human waste coupled with molecular hydrogen production

2014

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We have developed a wastewater treatment system that incorporates an electrolysis cell for on-site wastewater treatment coupled with molecular hydrogen production for use in a hydrogen fuel cell.Herein, we report on the efficacy of a laboratory-scale wastewater electrolysis cell (WEC) using real human waste for the first time with semiconductor electrode utilizing a mixed particle coating of bismuth oxide doped titanium dioxide (BiO x /TiO 2 ). A comprehensive environmental analysis has been coupled together with a robust kinetic model under the chemical reaction limited regime to investigate the role of various redox reactions mediated by chloride present in human waste. The oxidative elimination of the chemical oxygen demand (COD) and ammonium ion can be modelled using empirical, pseudo-first-order rate constants and current efficiencies (CE). In combination with an anaerobic pre-treatment step, human waste containing high-levels of COD, protein, and color are eliminated within 6 hours of batch treatment in the WEC. The reactor effluent has a residual inorganic total nitrogen (TN) concentration of $40 mM. The CE and specific energy consumption were 8.5% and 200 kWh per kgCOD for the COD removal, 11% and 260 for kWh per kgTN for the TN conversion. The CE and energy efficiencies (EE) for hydrogen production were calculated to be 90% and 25%, respectively.

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Section: Electrochemistry Of the Bio X /Tio 2 Anode In Dilute Chloridmentioning

confidence: 99%

“…24,25,38 In a typical sequence, Cl À is initially oxidized to a surface bound ClO À (eqn (4a)), which in turn reacts with another chloride in bulk aqueous solution or on the electrode surface to produce Cl 2 (eqn (4b)). In addition, an E a À IR exceeding the E of Cl 2…”

Section: 122139mentioning

confidence: 99%

Electrochemical treatment of human waste coupled with molecular hydrogen production

2014

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“…They are widely used for the production of chlorine and oxygen and find extensive applications in electroplating, solar cells and supercapacitors [1][2][3][4][5][6][7][8]. For example, they are efficient electrodes for sustaining the oxygen evolution reaction (OER), which is of great importance in water electrolyzers, rechargeable batteries, and zinc, copper, cobalt and nickel electrowinning processes.…”

Section: Introductionmentioning

confidence: 99%

Novel Ti/Ta2O5-SnO2 electrodes for water electrolysis and electrocatalytic oxidation of organics

Shestakova

Bonete

Gómez

et al. 2014

Electrochimica Acta

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Please cite this article as: M. Shestakova, P. Bonete, R. Gómez, M.S. , Walter Z. Tang, Novel Ti/Ta 2 O 5 -SnO 2 electrodes for water electrolysis and electrocatalytic oxidation of organics, Electrochimica Acta (2014), http://dx.doi. org/10.1016/j.electacta.2013.12.113 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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“…3033 mV dec ¹1 . 22 This was associated with the lower Ru molar ratio and the higher calcination temperature used in preparing the anodes in the present study.…”

Section: Voltammetric Behavior In Seawatermentioning

confidence: 78%

Ti/RuO2-IrO2-SnO2-Sb2O5 Anodes for Cl2 Evolution from Seawater

Wang

Yao

et al. 2012

Electrochemistry

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Seawater can be used as an electrolyte for Cl 2 evolution, and proper selection of electrode materials is of great importance. In this paper, a new type of dimensionally stable anodes, Ti/RuO 2 -IrO 2 -Sb 2 O 5 -SnO 2 , was investigated for Cl 2 evolution from seawater. The physicochemical and electrochemical properties were examined, and the electrocatalytic activity for Cl 2 evolution was measured under different conditions. It was shown that the RuO 2 -IrO 2 -Sb 2 O 5 -SnO 2 coating was compact in microstructure. The current efficiency was 71.2-86.7%, depending on the operational conditions. The anodes were predicted to be able to work effectively for over 6 years at a current density of 1500 A m −2 for seawater electrolysis.

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Oxygen and chlorine evolution on RuO2+TiO2+CeO2+Nb2O5 mixed oxide electrodes

Cited by 90 publications

References 31 publications

Electrochemical treatment of human waste coupled with molecular hydrogen production

Electrochemical treatment of human waste coupled with molecular hydrogen production

Novel Ti/Ta2O5-SnO2 electrodes for water electrolysis and electrocatalytic oxidation of organics

Ti/RuO2-IrO2-SnO2-Sb2O5 Anodes for Cl2 Evolution from Seawater

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