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Combustion of hydrogen-oxygen mixture in electrochemically generated nanobubbles

Vitaly B. Svetovoy, Remko G. P. Sanders, Theo S. J. Lammerink, and Miko C. Elwenspoek
Phys. Rev. E 84, 035302(R) – Published 22 September 2011
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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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  • Received 4 March 2011

DOI:https://doi.org/10.1103/PhysRevE.84.035302

©2011 American Physical Society

Synopsis

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Tiny Bubbles Burn Just Fine

Published 22 September 2011

Bubbles of hydrogen and oxygen burn spontaneously if they are small enough.

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Authors & Affiliations

Vitaly B. Svetovoy1,*, Remko G. P. Sanders1, Theo S. J. Lammerink1, and Miko C. Elwenspoek1,2

  • 1MESA+ Research Institute, University of Twente, PO 217, NL-7500 AE Enschede, The Netherlands
  • 2FRIAS, University of Freiburg, D-79104 Freiburg, Germany

  • *V.Svetovoy@utwente.nl

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Issue

Vol. 84, Iss. 3 — September 2011

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