Ammonia （NH

3

） can be synthesized as a nitrogen-rich fertilizer and also a carbon-free energy carrier.The traditional ammonia synthesis process is carried out under high temperatures and high pressures

with a large amount of energy consumption and greenhouse gas emissions.Non-thermal plasma（NTP） can be employed to synthesize ammonia at room temperature and atmospheric pressure

providing a potential and sustainable way to synthesize ammonia.In this paper

the synthesis process of ammonia from N

2

and H

2

driven by nanosecond pulsed dielectric barrier discharge （DBD）was studied.The effects of different pulse parameters

including pulse peak voltage

repetition

frequency

pulse rising time

on the volume fraction of synthetic ammonia were investigated.In addition

the effects of gas ratio

discharge gap

and different proportions of Ar on the effect of synthetic ammonia were also explored

and the electrical characteristics and luminescent images of the discharge were analyzed.The results show that the maximum NH

3

volume fraction of17 600×10

–6

and energy efficiency of 1.61 g/k Wh can be acquired at 12 k V

3 k Hz and volume ratio for N

2

:H

2

is 2:1.The pulse repetition frequency has a significant effect on ammonia volume fraction

and the volume fraction of ammonia increases with the increase of repetition frequency.As the repetition frequency increases

the number of high-energy electrons per unit of time also increases

and more N

2

and H

2

gas molecules are excited or dissociated

which increases the volume fraction of NH

3

.