We are applying 600VDC to a dielectric barrier discharge (DBD) reactor with a nickel electrode and CO2 and H2 as reactants to produce CO and H2O. Argon is added as internal standard. The reactor is made of fused quartz and the counter electrode is a silver coil around the tube. The current observed is 20-30 microamperes when the nickel electrode is set to -600VDC. Since the voltage is not high enough to produce electrical breakdown, can we assume that dark discharge plasma is responsible for this behavior?

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