Combustion of hydrogen-oxygen mixture in electrochemically generated nanobubbles


Svetovoy, Vitaly B. and Sanders, Remco G.P. and Lammerink, Theo S.J. and Elwenspoek, Miko (2011) Combustion of hydrogen-oxygen mixture in electrochemically generated nanobubbles. Physical Review E: Statistical, nonlinear, and soft matter physics, 84 (3). 035302. ISSN 1539-3755

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Abstract:Ignition of exothermic chemical reactions in small volumes is considered as difficult or impossible due to the large surface-to-volume ratio. Here observation of the spontaneous reaction is reported between hydrogen and oxygen in bubbles whose diameter is smaller than a threshold value around 150 nm. The effect is attributed to high Laplace pressure and to fast dynamics in nanobubbles and is the first indication on combustion in the nanoscale. In this study the bubbles were produced by water electrolysis using successive generation of H2 and O2 above the same electrode with short voltage pulses in the microsecond range. The process was observed in a microsystem at current densities > 1000 A/cm2 and relative supersaturations > 1000.
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Copyright:© 2011 American Physical Society
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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