Corrosion resistance mechanism of a novel porous Ti/Sn-Sb-RuOx/β-PbO2 anode for zinc electrowinning

Chen, Buming; Wang, Shichuan; Liu, Jianhua; Huang, Hui; Dong, Cansheng; He, Yapeng; Yan, Wenkai; Guo, Zhen; Ren-ping, XU; Yang, Haitao

doi:10.1016/j.corsci.2018.08.049

Cited by 63 publications

(25 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, the relationship between the Tafel parameters a, b and the exchange current i 0 is as in eqn ( 12) and (13).…”

Section: Electrochemical Examinationmentioning

confidence: 99%

“…[10][11][12] On this basis, porous lead dioxide was prepared because of its high electrocatalytic activity. 13 Simultaneously, given the unique surface morphology of porous lead dioxide, MnO 2 deposited on its surface will form a partially mosaic structure, improving the binding force between the two substances and the stability of the electrode.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Preparation and electrochemical properties of a novel porous Ti/Sn–Sb-RuO_x/β-PbO₂/MnO₂ anode for zinc electrowinning

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…In addition, the relationship between the Tafel parameters a, b and the exchange current i 0 is as in eqn ( 12) and (13).…”

Section: Electrochemical Examinationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation and electrochemical properties of a novel porous Ti/Sn–Sb-RuO_x/β-PbO₂/MnO₂ anode for zinc electrowinning

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…The thermodynamic stability of SbOx under the low pH OER conditions, 45 electrical conductivity, [46][47][48] along with abundance and availability of Sb 49 render these compounds a suitable structural component for acid-stable water oxidation electrocatalysts. Antimony oxides have been used as stabilising interlayers and components in robust electrowinning anodes, [50][51] and have recently been also introduced to studies of OER catalysts for acidic water electrolysers. In particular, the research teams of Gregoire 44,52 and Lewis 43, 53 both reported promising activity and improved stability in operation of antimonates of manganese and nickel.…”

Section: Introductionmentioning

confidence: 99%

Mixed Metal-Antimony Oxide Nanocomposites: Low pH Water Oxidation Electrocatalysts with Outstanding Durability at Ambient and Elevated Temperatures

Sibimol¹,

Chatti²,

Yadav³

et al. 2021

Preprint

View full text Add to dashboard Cite

Electrochemical water splitting with a proton-exchange membrane electrolyte provides many advantages for the energy-efficient production of high-purity H2 in a sustainable manner, but the current technology relies on high loadings of expensive and scarce iridium at the anodes, which are also often unstable in operation. To address this, the present work scrutinises the electrocatalytic properties of a range of mixed antimony-metal (Co, Mn, Ni, Fe, Ru) oxides synthesised as thin films by a simple solution-based method for the oxygen evolution reaction in aqueous 0.5 M H2SO4. Among the noble-metal free catalysts, cobalt-antimony and manganese-antimony oxides demonstrate good stability over 24 h and reasonable activity at 24 ± 2 °C, but slowly lose their initial activity at elevated temperatures. The ruthenium-antimony system is highly active, requiring an overpotential of only 0.39 ± 0.03 and 0.34 ± 0.01 V to achieve 10 mA cm-2 at 24 ± 2 and 80 °C, respectively, and most importantly, remaining remarkably stable during one-week tests at 80 °C. Detailed characterisation reveals that the enhanced stability of metal-antimony oxides water oxidation catalysts can arise from two distinct structural scenarios: either formation of a new antimonate phase, or nanoscale intermixing of metal and antimony oxide crystallites. Density functional theory analysis further indicates that the stability in operation is supported by the enhanced hybridisation of the oxygen p- and metal d-orbitals induced by the presence of Sb.

show abstract

“…Industrial zinc electrowinning processes are generally operated at a total cell voltage of 3.3-3.5 V, with a current density in the range of 400-600 A/m 2 and typical current efficiencies of 89-92% [1]. Since the anodic reaction contributes more than 1.9 V of the total cell voltage [1], previous research has primarily focused on the development of new anode materials for reducing the oxygen evolution reaction (OER) overpotential [2][3][4][5][6][7][8][9][10]. Nevertheless, Pb-Ag alloys remain the most widely utilized anodes due to their low cost and favorable corrosion resistance properties in sulfuric acid media [11,12].…”

Section: Introductionmentioning

confidence: 99%

Modelling the Effect of Solution Composition and Temperature on the Conductivity of Zinc Electrowinning Electrolytes

Wang

Aji

Wilson

et al. 2021

Metals

View full text Add to dashboard Cite

Zinc electrowinning is an energy-intensive step of hydrometallurgical zinc production in which ohmic drop contributes the second highest overpotential in the process. As the ohmic drop is a result of electrolyte conductivity, three conductivity models (Aalto-I, Aalto-II and Aalto-III) were formulated in this study based on the synthetic industrial electrolyte conditions of Zn (50–70 g/dm3), H2SO4 (150–200 g/dm3), Mn (0–8 g/dm3), Mg (0–4 g/dm3), and temperature, T (30–40 °C). These studies indicate that electrolyte conductivity increases with temperature and H2SO4 concentration, whereas metal ions have negative effects on conductivity. In addition, the interaction effects of temperature and the concentrations of metal ions on solution conductivity were tested by comparing the performance of the linear model (Aalto-I) and interrelated models (Aalto-II and Aalto-III) to determine their significance in the electrowinning process. Statistical analysis shows that Aalto-I has the highest accuracy of all the models developed and investigated in this study. From the industrial validation, Aalto-I also demonstrates a high level of correlation in comparison to the other models presented in this study. Further comparison of model Aalto-I with the existing published models from previous studies shows that model Aalto-I substantially improves the accuracy of the zinc conductivity empirical model.

show abstract

Corrosion resistance mechanism of a novel porous Ti/Sn-Sb-RuOx/β-PbO2 anode for zinc electrowinning

Cited by 63 publications

References 52 publications

Preparation and electrochemical properties of a novel porous Ti/Sn–Sb-RuO_x/β-PbO₂/MnO₂ anode for zinc electrowinning

Preparation and electrochemical properties of a novel porous Ti/Sn–Sb-RuO_x/β-PbO₂/MnO₂ anode for zinc electrowinning

Mixed Metal-Antimony Oxide Nanocomposites: Low pH Water Oxidation Electrocatalysts with Outstanding Durability at Ambient and Elevated Temperatures

Modelling the Effect of Solution Composition and Temperature on the Conductivity of Zinc Electrowinning Electrolytes

Contact Info

Product

Resources

About

Corrosion resistance mechanism of a novel porous Ti/Sn-Sb-RuOx/β-PbO2 anode for zinc electrowinning

Cited by 63 publications

References 52 publications

Preparation and electrochemical properties of a novel porous Ti/Sn–Sb-RuOx/β-PbO2/MnO2 anode for zinc electrowinning

Preparation and electrochemical properties of a novel porous Ti/Sn–Sb-RuOx/β-PbO2/MnO2 anode for zinc electrowinning

Mixed Metal-Antimony Oxide Nanocomposites: Low pH Water Oxidation Electrocatalysts with Outstanding Durability at Ambient and Elevated Temperatures

Modelling the Effect of Solution Composition and Temperature on the Conductivity of Zinc Electrowinning Electrolytes

Contact Info

Product

Resources

About

Preparation and electrochemical properties of a novel porous Ti/Sn–Sb-RuO_x/β-PbO₂/MnO₂ anode for zinc electrowinning

Preparation and electrochemical properties of a novel porous Ti/Sn–Sb-RuO_x/β-PbO₂/MnO₂ anode for zinc electrowinning