Performance characterization of Ti substrate lead dioxide electrode with different solid solution interlayers

Kong, Haishen; Lu, Haiyan; Zhang, Wenli; Lin, Haibo; Huang, Weimin

doi:10.1007/s10853-012-6613-x

Cited by 47 publications

(21 citation statements)

References 26 publications

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“…The characteristic signals of IrO 2 disappeared after subsequent multiple junction fabrication; this is also consistent with the EDS analysis. The surficial XRD profiles of the BiO x /TiO 2 anode showed peaks from anatase TiO 2 (2θ = 25⁰) and α-phase Bi 2 O 3 (2θ = 33⁰), whose diffraction intensities were much lower than the Ir 0.73 Ta 0.27 O[31] reported comparable results where a heterojunction deposition of PbO 2 thin layer showed negligible effects on the OER activity of IrO 2 -Ta 2 O 5 anode. Considering the substantial loading (thickness) of the outer BiO x /TiO 2 layer, the electron transfer towards the underlying Ir components is suspected to be governed by a bulk-limited conduction, rather than an electron tunneling as in the case of ultrathin TiO 2 film[32].…”

mentioning

confidence: 85%

Molecular hydrogen production from wastewater electrolysis cell with multi-junction BiOx/TiO2 anode and stainless steel cathode: Current and energy efficiency

Cho

Hoffmann

2017

Applied Catalysis B: Environmental

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Electrochemical hydrogen evolution reaction (HER) has been recognized as a viable approach to generate a clean energy fuel. However, substantial technical breakthroughs are needed to reduce the costs for electricity and chemical reagents. In this study, we explore a specific wastewater electrolysis cell (WEC) as an alternative of decentralized H 2 production coupled with onsite water treatment. A prototypical WEC consists of a multi-junction semiconductor anode and a stainless steel cathode paired in single compartment cell. A distinct layer of BiO x /TiO 2 on anode surface had relatively low crystallinity that was shown to be beneficial for higher oxide formation and O 2 evolution. The over-potential and Tafel slope of the BiO x /TiO 2 anode were determined to be 0.32 V and 120 mV decade-1. In a single compartment WEC with a NaCl electrolyte ([Cl-] ≤ 50 mM), the current density (j) ranged up to 500 A m-2 at cell voltages less than 6 V, while the current efficiency (CE) for free chlorine (FC) evolution showed maximum value near 0.3. The CE and energy efficiency (EE) for the HER were assessed using NaCl solutions (50 mM with or without 2.5 g L-1 urea) and real wastewater with variable compositions ([Cl-]: 6 ~ 33 mM, [chemical oxygen demand]: 60 ~ 790 mg L-1). The ohmic resistance of wastewater electrolyte rules out the usage of membrane separation, resulting in side reactions such as reduction of O 2 whose CE values monotonically decreased with an increasing j under the diffusion controlled regime. Chloride ions reduce the electron consumption during O 2 reduction, while elevated levels of FC significantly lower the CE for the HER. The combined presence of oxidizable organic compounds and Clenhance the CE for the HER as long as the concentration of organics is enough to quench FC to maintain a pseudo steady-state concentration. The highest CE (0.8) and EE (0.23) for HER were observed during electrolysis of real wastewater at j values exceeding 200 A m-2. However, a dependency of value of EE on the applied cell voltage needs to be addressed further.

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mentioning

confidence: 85%

Molecular hydrogen production from wastewater electrolysis cell with multi-junction BiOx/TiO2 anode and stainless steel cathode: Current and energy efficiency

Cho

Hoffmann

2017

Applied Catalysis B: Environmental

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“…The q* PbO 2 -0.2 M. Larger activity surface area led to higher electrochemical activity on oxygen evolution. 36…”

Section: Electrochemical Testmentioning

confidence: 99%

Preparation and characterization of PbO2 electrodes from electro-deposition solutions with different copper concentration

Shao

Zhang

et al. 2014

RSC Adv.

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“…021-1272). This suggests that these dioxides are mainly present in the solid solution because they possess the same valence and similar ionic radius, which means they satisfy the Hume-Rothery conditions for the formation of a substitution solid solution [17,18]. It is therefore rational that the X-ray diffractograms of the mixed oxides show slight shift in the peak positions.…”

Section: Xrd Analysismentioning

confidence: 93%

Template-Free Hydrothermal Synthesis of Nanorod (RuTi)O2 Composite Cathode for Hydrogen Evolution in Alkali Solution

Xiong¹,

Zhou²,

Zhang³

et al. 2015

Proceedings of the 2015 International Symposium on Material, Energy and Environment Engineering

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Abstract.A novel nanorod (RuTi)O 2 composite cathode has been prepared via a facile and controllable approach. X-ray diffraction (XRD), scanning electron microscopy (SEM), and linear scanning voltammetry (LSV) were used to scrutinize the electrodes and the electrochemical performance. The results reveal that the designed nanorod (RuTi)O 2 composite cathode displays high electrocatalytic performance for the hydrogen evolution evolution (HER) in alkali solution with a low onset overpotential. For driving a cathodic current density of 100 mA cm -2 , it only needs overpotential of 220 mV. Such excellent performance of the NR-(RuTi)O 2 /Ti could be ascribed to the unique surface structure with more active sites to be utilized during the HER.

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Performance characterization of Ti substrate lead dioxide electrode with different solid solution interlayers

Cited by 47 publications

References 26 publications

Molecular hydrogen production from wastewater electrolysis cell with multi-junction BiOx/TiO2 anode and stainless steel cathode: Current and energy efficiency

Molecular hydrogen production from wastewater electrolysis cell with multi-junction BiOx/TiO2 anode and stainless steel cathode: Current and energy efficiency

Preparation and characterization of PbO2 electrodes from electro-deposition solutions with different copper concentration

Template-Free Hydrothermal Synthesis of Nanorod (RuTi)O2 Composite Cathode for Hydrogen Evolution in Alkali Solution

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