[ industry update ]
Nanobubble research to improve green hydrogen production In a novel study , researchers at the University of Twente have made significant strides in understanding the behaviour of micro- and nanobubbles on electrodes during water electrolysis , a process crucial for green hydrogen production . These tiny bubbles form on the electrodes , blocking the flow of electricity and reducing the efficiency of the reaction .
Supported by advanced molecular simulations ,
Detlef Lohse and his team have developed a theory that can successfully predict the electrical current density needed to allow the nanobubbles to grow uncontrollably and detach , thus freeing the electrode for further hydrogen production . This finding is pivotal as it enables the prediction and control of bubble behaviour , ensuring that electrolysis can proceed with minimal disruption . The research builds upon the established stability theory for surface nanobubbles ( the Lohse- Zhang model ) and extends
it to include the electrolytic current density to predict bubble behaviour .
With this improved knowledge , scientists and engineers can now work towards enhancing the detachment of bubbles . Besides improving the overall efficiency of water electrolysis , this work can also be used in other systems where gas bubbles are formed , such as in catalysis .
The study was published in the Proceedings of the National Academy of Sciences of the United States of America ( PNAS ).
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Hydrogen Tech World | Issue 16 | June 2024 9