Effects on the characteristics of bonding and local structure in molybdenum-lead-lead dioxide glasses and vitroceramics

Rada, M.; Zagrai, Mioara; Rada, S.; Bot, A.; Culea, E.

doi:10.1016/j.jallcom.2017.02.091

Cited by 12 publications

(5 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lead glasses have lower melting and glass transition temperatures and high refractive indices with low crystallization tendency. Until now, most studies discussed the effect of metal oxide levels in binary PbO 2 -Pb glasses and vitroceramics [ 1 , 2 , 3 , 4 ]. The previous studies [ 5 ] indicate that doping the PbO 2 -Pb vitreous system with MnO 2 leads to improved electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

XANES, EXAFS, Voltammetric, and Microhardness Studies of Manganese Dioxide–Lead–Lead Dioxide Vitroceramics

2022

Self Cite

View full text Add to dashboard Cite

In this work we investigated the electrochemical performances and mechanical behavior of the manganese dioxide–lead dioxide–lead vitreous system. The structural and electrochemical properties of vitroceramics were investigated by the analysis of X-ray diffraction (XRD) spectra, X-ray absorption spectroscopy (XAS), and measurements of cyclic voltammetry and linear sweep voltammetry. The mechanical properties of the studied samples were determined by Vickers hardness values using the indentation method. The analysis of X-ray absorption near edge structure (XANES) data for the L3 edge of the lead and the radial distribution function data for the PbO2 and Pb model indicate the modification of Pb-O interatomic distances by the doping process. The voltammetric study reveals the vitroceramic with x = 90 mol% Pb as the most suitable for application as a lead acid battery electrode.

show abstract

Section: Introductionmentioning

confidence: 99%

XANES, EXAFS, Voltammetric, and Microhardness Studies of Manganese Dioxide–Lead–Lead Dioxide Vitroceramics

2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…Copper ions can exist in two oxidation states: Cu +1 ions (with 3d 10 electronic configuration, diamagnetic properties, colorless) and Cu +2 ions (with 3d 9 electronic configuration, paramagnetic properties, creating color centers with a absorption band in the visible region). 13,14 The UV-vis band located at about 270 nm can be attributed to the 3d 10 → 3d 9 4s 1 electronic transitions of the Cu +1 ions. An increasing trend in the intensity of this band is observed by doping with higher CuO content suggesting the Cu +2 → Cu +1 conversion during synthesis of the samples.…”

Section: Resultsmentioning

confidence: 99%

Performance of the Recycled and Copper-Doped Materials from Spent Electrodes by XPS and Voltammetric Characteristics

Rada

Ungureşan

Rada

et al. 2020

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

Recycling of electrodes from a car battery and doping them with high CuO content was achieved by the melt quenching method. As sources of PbO2 and Pb, the active mass of the anode (Pb) and the cathode (PbO2) of a spent lead accumulator was used. The analysis of X-ray diffractograms shows that by the doping the recycled electrodes from the spent car battery with high CuO content there is an increasing conversion of the metallic plate made mainly of metallic lead in vitroceramic containing PbO2 and nanoparticles of Cu2O. UV–vis data indicate the presence of Pb+2, Cu+1 and Cu+2 ions in the structure of the electrodes. Values of the optical band gap energies are smaller than 3 eV indicating a semiconductor behavior of the samples. EPR data indicate resonance lines provided from contributions of the isolated Cu+2 ions overlap with the broader resonance lines corresponding to the clustered and/or coupled Cu+2 ions. Cyclic voltamograms of the electrodes dopped with CuO contents show waves in the positive scanning of the current density because of the redox processes of the copper species. The XPS data of Pb 4f show clear evidences for valence fluctuations of lead ions in recycled and copper-doped samples.

show abstract

“…Noting that the decrease of the intensity of band located at around 378-385 nm, most probably related to Mo 5+ CT transition [77], after sulfate addition (Fig. 6B [78] crystalline phases, respectively which exist in a trace amounts and seem to be too small to be detected by the XRD technique.…”

Section: Dr Uv-vis Spectroscopymentioning

confidence: 98%

A new V₂O₅–MoO₃–TiO₂–SO₄²⁻nanostructured aerogel catalyst for diesel DeNO_xtechnology

et al. 2020

View full text Add to dashboard Cite

show abstract

Effects on the characteristics of bonding and local structure in molybdenum-lead-lead dioxide glasses and vitroceramics

Cited by 12 publications

References 18 publications

XANES, EXAFS, Voltammetric, and Microhardness Studies of Manganese Dioxide–Lead–Lead Dioxide Vitroceramics

XANES, EXAFS, Voltammetric, and Microhardness Studies of Manganese Dioxide–Lead–Lead Dioxide Vitroceramics

Performance of the Recycled and Copper-Doped Materials from Spent Electrodes by XPS and Voltammetric Characteristics

A new V₂O₅–MoO₃–TiO₂–SO₄²⁻nanostructured aerogel catalyst for diesel DeNO_xtechnology

Contact Info

Product

Resources

About

Effects on the characteristics of bonding and local structure in molybdenum-lead-lead dioxide glasses and vitroceramics

Cited by 12 publications

References 18 publications

XANES, EXAFS, Voltammetric, and Microhardness Studies of Manganese Dioxide–Lead–Lead Dioxide Vitroceramics

XANES, EXAFS, Voltammetric, and Microhardness Studies of Manganese Dioxide–Lead–Lead Dioxide Vitroceramics

Performance of the Recycled and Copper-Doped Materials from Spent Electrodes by XPS and Voltammetric Characteristics

A new V2O5–MoO3–TiO2–SO42−nanostructured aerogel catalyst for diesel DeNOxtechnology

Contact Info

Product

Resources

About

A new V₂O₅–MoO₃–TiO₂–SO₄²⁻nanostructured aerogel catalyst for diesel DeNO_xtechnology