Steam assisted oxide growth on aluminium alloys using oxidative chemistries: Part I Microstructural investigation

Din, Rameez Ud; Piotrowska, Kamila; Gudla, Visweswara Chakravarthy; Jellesen, Morten Stendahl; Ambat, Rajan

doi:10.1016/j.apsusc.2015.07.182

Cited by 16 publications

(7 citation statements)

References 28 publications

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“…Such the electron transfers from Mn to Ru leads to the increased electron density of the Ru site in Mn-RuO 2 . Meanwhile, the Mn 2p peaks at around 641.9 and 653.7 eV (Figure e) reveal their multivalent state in Mn-RuO 2 including Mn(VI) and Mn(VII) . Besides, we employed N 2 adsorption–desorption experiment to obtain the detail of the structure.…”

Section: Resultsmentioning

confidence: 99%

“…Meanwhile, the Mn 2p peaks at around 641.9 and 653.7 eV (Figure 2e) reveal their multivalent state in Mn-RuO 2 including Mn(VI) and Mn(VII). 26 Besides, we employed N 2 adsorption−desorption experiment to obtain the detail of the structure. The Brunauer−Emmett−Teller analysis (Figure 2f) demonstrated that the Mn-RuO 2 has a type II isotherm, and the specific surface area (160.28 m 2 /g) of the Mn-RuO 2 is similar to that of Nano RuO 2 (146.66 m 2 /g) in the Figure S6.…”

Section: Resultsmentioning

confidence: 99%

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Mn-Doped RuO₂ Nanocrystals as Highly Active Electrocatalysts for Enhanced Oxygen Evolution in Acidic Media

et al. 2019

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Currently, RuO 2 is a benchmark acidic oxygen evolution reaction (OER) catalyst. Nevertheless, its wide applications are always restricted by slow dynamics and limited durability. This paper reports a type of Mn-doped RuO 2 nanocrystals for boosting the OER catalytic performance in acidic media. The catalyst (named Mn-RuO 2 ) is prepared through annealing of Ru-exchanged Mn-based derivative at 300 °C. Such Mn-RuO 2 exhibits excellent acidic OER activity, with an overpotential of 158 mV at 10 mA cm −2 and a stability of 5000 cycles in the presence of sulfuric acid (0.5 mol/L). Both structural characterization and theoretical analysis show that the Mn doping in RuO 2 can tune the d-band center of Ru active sites and lower antibonding surface-adsorbate states, which leads to a decreased free energy of the rate-determining step, ultimately enhancing the intrinsic activity of RuO 2 .

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Mn-Doped RuO₂ Nanocrystals as Highly Active Electrocatalysts for Enhanced Oxygen Evolution in Acidic Media

et al. 2019

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“…Based on the XPS results, the main components of Mn/Ti/Zr passivation on Al foil are MnO 2 , TiO 2 , ZrO 2 , and ZrF 4 . The possible reaction equations take place on the surface as shown in eqs –4. ,, …”

Section: Resultsmentioning

confidence: 99%

Highly Stable Al Metal Anode Enabled by Surface Chemical Passivation for Long-Life Aqueous Al Metal Batteries

Hao

Chen

et al. 2023

ACS Appl. Mater. Interfaces

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Aqueous aluminum (Al) metal batteries (AMBs) have received much attention due to their high volumetric energy density, low cost, and high safety. However, the practical application of aqueous AMBs is limited by the electrochemical reversibility of the Al anode, which is often deteriorated by corrosion. Herein, we developed a dense passivation layer based on Mn/Ti/Zr compounds on the Al metal anode by a rapid surface passivation strategy. The passivation layer can effectively uniform Al deposition, increase corrosion resistance, and significantly enhance the cycling stability of Al anodes in both symmetric and full cells. Symmetric cells assembled with the treated Al electrodes exhibit stable cycling for over 300 cycles at 0.1 mA cm–2 and 0.05 mA h cm–2, and a 600-cycle life is achieved for a prototype full cell. This work provides a versatile remedy for the limited cycle life of Al metal anodes for rechargeable aqueous batteries.

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“…The former peak could be attributed to both Mn 3+ and Mn 4+ since the positions of these two peaks are very close to each other. 46,47 Moreover, the obtained EELS results on the anode surface justify the identification of the main two Mn 2p peaks as Mn 3+ species. The other two weaker peaks observed at the higher binding energies are most likely due to the residue of KMnO 4 present in the electrolyte.…”

Section: Resultsmentioning

confidence: 99%

A KMnO₄-Generated Colloidal Electrolyte for Redox Mediation and Anode Protection in a Li–Air Battery

et al. 2022

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The rechargeable lithium–oxygen (Li–O2) battery has the highest theoretical specific energy density of any rechargeable batteries and could transform energy storage systems if a practical device could be attained. However, among numerous challenges, which are all interconnected, are polarization due to sluggish kinetics, low cycle life, small capacity, and slow rates. In this study, we report on use of KMnO4 to generate a colloidal electrolyte made up of MnO2 nanoparticles. The resulting electrolyte provides a redox mediator for reducing the charge potential and lithium anode protection to increase cycle life. This electrolyte in combination with a stable binary transition metal dichalcogenide alloy, Nb0.5Ta0.5S2, as the cathode enables the operation of a Li–O2 battery at a current density of 1 mA·cm–2 and specific capacity ranging from 1000 to 10 000 mA·h·g–1 (corresponding to 0.1–1 mA·h·cm–2) in a dry air environment with a cycle life of up to 150. This colloidal electrolyte provides a robust approach for advancing Li–air batteries.

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Steam assisted oxide growth on aluminium alloys using oxidative chemistries: Part I Microstructural investigation

Cited by 16 publications

References 28 publications

Mn-Doped RuO₂ Nanocrystals as Highly Active Electrocatalysts for Enhanced Oxygen Evolution in Acidic Media

Mn-Doped RuO₂ Nanocrystals as Highly Active Electrocatalysts for Enhanced Oxygen Evolution in Acidic Media

Highly Stable Al Metal Anode Enabled by Surface Chemical Passivation for Long-Life Aqueous Al Metal Batteries

A KMnO₄-Generated Colloidal Electrolyte for Redox Mediation and Anode Protection in a Li–Air Battery

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Steam assisted oxide growth on aluminium alloys using oxidative chemistries: Part I Microstructural investigation

Cited by 16 publications

References 28 publications

Mn-Doped RuO2 Nanocrystals as Highly Active Electrocatalysts for Enhanced Oxygen Evolution in Acidic Media

Mn-Doped RuO2 Nanocrystals as Highly Active Electrocatalysts for Enhanced Oxygen Evolution in Acidic Media

Highly Stable Al Metal Anode Enabled by Surface Chemical Passivation for Long-Life Aqueous Al Metal Batteries

A KMnO4-Generated Colloidal Electrolyte for Redox Mediation and Anode Protection in a Li–Air Battery

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Product

Resources

About

Mn-Doped RuO₂ Nanocrystals as Highly Active Electrocatalysts for Enhanced Oxygen Evolution in Acidic Media

Mn-Doped RuO₂ Nanocrystals as Highly Active Electrocatalysts for Enhanced Oxygen Evolution in Acidic Media

A KMnO₄-Generated Colloidal Electrolyte for Redox Mediation and Anode Protection in a Li–Air Battery