  The plasma dry reforming reaction of methane with carbon dioxide is
investigated in a nanosecond repetitively pulsed discharge, a type of plasma
that offers one of the highest non-equilibrium and performance characteristics.
The experiment's purpose was to examine the effect of varying the sequence of
high-voltage pulses for the same plasma energy. We find that when successive
pulses are closer than 500 $\rm \mu$s, a memory-dominated regime gradually
develops, which influences subsequent breakdown events. As a result, both a
higher reactant conversion and more efficient use of the energy injected into
the discharge plasma are achieved.
