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Study on the characteristics of hydrogen bubble formation and its transport during electrolysis of water
Published in Elsevier Ltd
2015
Volume: 138
   
Pages: 99 - 109
Abstract
This study experimentally investigates the characteristics of hydrogen bubble formation and its transport near the electrode surface during the electrolysis of water. It is observed that the mean size of the bubble and its distribution near the cathode continuously changes over a period of an hour before reaching a steady state, particularly for high superficial current density (1200mA/cm2). The reason for this variation is explained using temporal evolution of the measured velocity distribution of bubbles having different sizes. A bubble plume constitutes of several individual bubble streams interacting with each other. The growth of the big bubbles on the electrode surface and the small bubbles along the stream follows diffusion laws of growth in a solution supersaturated with hydrogen. It is shown that this growth rate along with the detached bubble velocity is vital in determining the bubble size distribution near the electrode surface. © 2015 Elsevier Ltd.
About the journal
JournalData powered by TypesetChemical Engineering Science
PublisherData powered by TypesetElsevier Ltd
ISSN00092509
Open AccessNo
Concepts (15)
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    Bubble columns
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    BUBBLE FORMATION
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    Electrodes
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    Electrolysis
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    Hydrogen
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    Size distribution
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    Bubble growth
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    BUBBLE SIZE DISTRIBUTIONS
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    BUBBLE VELOCITIES
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    Electrode surfaces
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    ELECTROLYSIS OF WATERS
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    HYDROGEN BUBBLE FORMATION
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    HYDROGEN BUBBLES
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    Temporal evolution
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    Bubbles (in fluids)