Iodine compounds speciation in HI–I 2 aqueous solutions by Raman spectroscopy

Spadoni, A.; Falconieri, M.; Lanchi, M.; Liberatore, Raffaele; Marrocco, Michele; Sau, Salvatore; Tarquini, P.

doi:10.1016/j.ijhydene.2011.10.009

Cited by 36 publications

(15 citation statements)

References 24 publications

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“…Electrolytes in the as-prepared state, after discharging, and after charging were examined using Raman spectroscopy, as shown in Figure 4 e. While the oxidized forms of I 2 and I 3 À have clear vibration modes at 189, 165, and 112 cm À1 , respectively, the initial form of I À has no vibration mode. [34,35] No noticeable changes were observed after discharging and charging and no trace of I 2 or I 3 À ions was noted. These findings indicate that these oxidized species immediately return to their initial I À ion state upon a reaction with Li 2 O 2 during the charge process.…”

Section: Methodsmentioning

confidence: 95%

Superior Rechargeability and Efficiency of Lithium–Oxygen Batteries: Hierarchical Air Electrode Architecture Combined with a Soluble Catalyst

et al. 2014

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The lithium-oxygen battery has the potential to deliver extremely high energy densities; however, the practical use of Li-O2 batteries has been restricted because of their poor cyclability and low energy efficiency. In this work, we report a novel Li-O2 battery with high reversibility and good energy efficiency using a soluble catalyst combined with a hierarchical nanoporous air electrode. Through the porous three-dimensional network of the air electrode, not only lithium ions and oxygen but also soluble catalysts can be rapidly transported, enabling ultra-efficient electrode reactions and significantly enhanced catalytic activity. The novel Li-O2 battery, combining an ideal air electrode and a soluble catalyst, can deliver a high reversible capacity (1000 mAh g(-1) ) up to 900 cycles with reduced polarization (about 0.25 V).

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Section: Methodsmentioning

confidence: 95%

Superior Rechargeability and Efficiency of Lithium–Oxygen Batteries: Hierarchical Air Electrode Architecture Combined with a Soluble Catalyst

et al. 2014

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“…Electrolytes in the as‐prepared state, after discharging, and after charging were examined using Raman spectroscopy, as shown in Figure 4 e. While the oxidized forms of I 2 and I 3 − have clear vibration modes at 189, 165, and 112 cm −1 , respectively, the initial form of I − has no vibration mode 34. 35 No noticeable changes were observed after discharging and charging and no trace of I 2 or I 3 − ions was noted.…”

mentioning

confidence: 99%

Superior Rechargeability and Efficiency of Lithium–Oxygen Batteries: Hierarchical Air Electrode Architecture Combined with a Soluble Catalyst

Lim¹,

Song²,

Gwon³

et al. 2014

Angewandte Chemie

136

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The lithium–oxygen battery has the potential to deliver extremely high energy densities; however, the practical use of Li‐O2 batteries has been restricted because of their poor cyclability and low energy efficiency. In this work, we report a novel Li‐O2 battery with high reversibility and good energy efficiency using a soluble catalyst combined with a hierarchical nanoporous air electrode. Through the porous three‐dimensional network of the air electrode, not only lithium ions and oxygen but also soluble catalysts can be rapidly transported, enabling ultra‐efficient electrode reactions and significantly enhanced catalytic activity. The novel Li‐O2 battery, combining an ideal air electrode and a soluble catalyst, can deliver a high reversible capacity (1000 mAh g−1) up to 900 cycles with reduced polarization (about 0.25 V).

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“…Since the Raman cross section of sulfur is particularly favourable, sulfites and sulfates have been investigated in solution, glassy state and solid state, often accompanied by infrared spectroscopy [18][19][20][21][22][23][24][25]. Raman spectroscopy has been also used to study other sulfur family cycle, the S-I cycle, to gain further insights into molecular dynamics of the solutions involved and chemical species occurring within [26][27][28]. A complementary technique, inelastic neutron scattering (INS) spectroscopy, exhibits a remarkable hydrogen cross section that allows to study either hydrogen bonding, hydrogenated species, adsorbed molecular hydrogen, and even proton conduction [29,30].…”

Section: Introductionmentioning

confidence: 99%

Raman and inelastic neutron scattering spectra of (NH4)2SO3, an intermediate for solar hydrogen production

Orozco-Mena

Parker

Herrera-Peraza

et al. 2017

International Journal of Hydrogen Energy

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Citation: RE Orozco-Mena et al. "Raman and inelastic neutron scattering spectra of (NH4)2SO3, an intermediate for solar hydrogen production. AbstractThe sulfur-ammonia (S-NH3) cycle uses the entire solar radiation spectrum to split water. It uses the UV radiation to promote the photolytic oxidation of ammonium sulfite to produce hydrogen and ammonium sulfate. Here, Raman and inelastic neutron scattering spectra of (NH4)2SO3·H2O at 20 K are discussed, supported by density functional theory (DFT) calculations. The feasibility of photolytic oxidation of this monohydrate to produce hydrogen at room temperature was also demonstrated.

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Iodine compounds speciation in HI–I 2 aqueous solutions by Raman spectroscopy

Cited by 36 publications

References 24 publications

Superior Rechargeability and Efficiency of Lithium–Oxygen Batteries: Hierarchical Air Electrode Architecture Combined with a Soluble Catalyst

Superior Rechargeability and Efficiency of Lithium–Oxygen Batteries: Hierarchical Air Electrode Architecture Combined with a Soluble Catalyst

Superior Rechargeability and Efficiency of Lithium–Oxygen Batteries: Hierarchical Air Electrode Architecture Combined with a Soluble Catalyst

Raman and inelastic neutron scattering spectra of (NH4)2SO3, an intermediate for solar hydrogen production

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