Photoelectrochemical energy conversion and storage using polycrystalline chalcogenide electrodes

Hodes, Gary; Manassen, J.; Cahen, David

doi:10.1038/261403a0

Cited by 474 publications

(261 citation statements)

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“…This is a consequence of the fact that selenium is widely used in the many branches of the industry from pharmacy to electronics [2,[4][5][6][7]. Furthermore, the electrochemistry itself gives many possibilities of producing selenium [8], to recover it from wastes [9], to analyze its concentration in solutions [10,11] and to carry out synthesis of various materials containing this element.…”

Section: Introductionmentioning

confidence: 99%

Microgravimetric Studies of Selenium Electrodeposition Onto Different Substrates

Kowalik¹

2014

Archives of Metallurgy and Materials

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The mechanism of selenium electrodeposition from sulfuric acid solution on different substrates was studied with the electrochemical techniques. The cyclic voltammetry was combined with the quartz crystal microbalance technique to analyze selenium deposition process. The electrochemical reduction of selenous acid on gold, silver and copper electrodes was investigated. It was found that reduction of selenous acid is a very complex process and it strongly depends from the applied substrate. The voltammetric measurements indicate the range of potentials in which the process of reduction of selenous acids on the applied substrate is possible. Additionally, the microgravimetric data confirm the deposition of selenium and they reveal the mechanism of the deposition process.Keywords: selenium, electrochemistry, electrodeposition, cyclic voltammetry, electrochemical quartz crystal microbalance Przedstawione w niniejszej pracy wyniki badań opisują mechanizm elektrochemicznego osadzania selenu z roztworów siarczanowych na różnych podłożach. W celu dokładnej analizy zachodzących procesów elektrodowych w badaniach zastosowano technikę cyklicznej woltamperometrii połączoną z elektrochemiczną mikrowagą kwarcową. W pracy porównano procesy redukcji kwasu selenowego(IV) na elektrodach złotej, srebrnej i miedzianej. Dzięki zastosowanym technikom badawczym jednoznacznie określono zakres osadzania się selenu na wybranych podłożach oraz wskazano możliwy mechanizm przebiegających reakcji elektrodowych.

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Section: Introductionmentioning

confidence: 99%

Microgravimetric Studies of Selenium Electrodeposition Onto Different Substrates

Kowalik¹

2014

Archives of Metallurgy and Materials

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“…These can be synthesized by means of low-temperature chemical precipitation or vapour deposition techniques, as described in previous works [11,12]. The materials may also be electrosynthesized, either cathodically [13][14][15] or anodically [16,17] from an aqueous or non-aqueous medium. Literature shows very few reports on SnSSe in mixed crystals of composition SnS 0.5 Se 0.5 have the same crystal structure as SnS and SnSe.…”

Section: Introductionmentioning

confidence: 99%

Role of Deposition Potential on the Optical Properties of SnSSe Thin Films

Mahalingam¹,

Dhanasekaran²,

Ravi³

et al. 2011

ECS Trans.

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SnSSe solid solution thin films were electrosynthesized from an aqueous solution by potentiostatic method. Films were deposited at different potentials in the range of -700 mV to -1000 mV vs SCE. XRD patterns revealed that the deposited films exhibited polycrystalline orthorhombic structure with preferred orientation along (111) crystallographic plane. The optical band gap value was calculated from transmittance and absorption data and the films were found to have direct band gap found to be 1.08 eV-1.25 eV. The refractive index, extinction coefficient, real and imaginary part of dielectric constants and optical conductivity of the SnSSe thin films has been calculated. The value for the refractive index lies between 2.5 and 3.1 and value of extinction coefficient lies between 0.035 and 0.052. Surface morphological studies revealed pellet shaped grains occupying the entire surface of the film distributed homogeneity.

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“…For example, sulfide (S 2-) or polysulfide (S2-) electrolytes greatly inhibit the photoanodic sulfidedeS~ eetrlye dissolution of CdS (4,5,6,7,8). Polysulfide species can be oxidized at the photoanode and simultaneously reduced at the counterelectrode to yield a PEC which exhibits little change in electrolyte or electrode composition, thus permitting the sustained conversion of optical energy to electricity.…”

Section: Cds Hy-'mentioning

confidence: 99%