Zinc electrodeposition from flowing alkaline zincate solutions: Role of hydrogen evolution reaction

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F17%3A43914167" target="_blank" >RIV/60461373:22340/17:43914167 - isvavai.cz</a>
Alternative codes found
RIV/49777513:23640/17:43950086
Result on the web
<a href="http://dx.doi.org/10.1016/j.jpowsour.2017.10.077" target="_blank" >http://dx.doi.org/10.1016/j.jpowsour.2017.10.077</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jpowsour.2017.10.077" target="_blank" >10.1016/j.jpowsour.2017.10.077</a>

Result language
angličtina
Original language name
Zinc electrodeposition from flowing alkaline zincate solutions: Role of hydrogen evolution reaction
Original language description
The hydrogen evolution reaction is known as a parasitic reaction during the zinc electrodeposition from alkaline zincate solutions and is thus responsible for current efficiency losses during the electrolysis. Besides that, the rising hydrogen bubbles may cause an extra convection within a diffusion layer, which leads to an enhanced mass transport of zincate ions to an electrode surface. In this work, the mentioned phenomena were studied experimentally in a flow through electrolyzer and the obtained data were subsequently evaluated by mathematical models. The results prove the indisputable influence of the rising hydrogen bubbles on the additional mixing of the diffusion layer, which partially compensates the drop of the current efficiency of the zinc deposition at higher current flows. Moreover, the results show that the current density ratio (i.e., the ratio of an overall current density to a zinc limiting current density) is not suitable for the description of the zinc deposition, because the hydrogen evolution current density is always involved in the overall current density.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20401 - Chemical engineering (plants, products)

Project
<a href="/en/project/ED2.1.00%2F03.0088" target="_blank" >ED2.1.00/03.0088: Centre of the New Technologies and Materials</a><br>
Continuities
S - Specificky vyzkum na vysokych skolach

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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