Experimental evidence is presented that combustion can ignite at room temperature spontaneously inside microbubbles filled with mixture of hydrogen and oxygen. We perform water electrolysis in a closed microchamber by voltage pulses of alternating polarity at repetition frequencies to pump the gases rapidly into the electrolyte and produce extreme supersaturation with both gases. After a delay of , we observe stroboscopically microbubbles of in diameter that appear in between the electrodes for several microseconds. Each event is accompanied by a pressure jump of that is measured interferometrically. The pressure jumps are attributed to combustion of the gases in the microbubbles.
Observation of spontaneous combustion of hydrogen and oxygen in microbubbles
A. V. Postnikov, I. V. Uvarov, A. V. Prokaznikov, V. B. Svetovoy; Observation of spontaneous combustion of hydrogen and oxygen in microbubbles. Appl. Phys. Lett. 21 March 2016; 108 (12): 121604. https://doi.org/10.1063/1.4944780
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