Surface dielectric barrier discharge (SDBD) can generate ozone and nitrogen oxides

and is widely applied in air purification

agricultural nitrogen fixation

and related fields. To achieve efficient and controllable regulation of SDBD product modes

this study develops an in-situ electrode temperature measurement and control system. The system integrates a dual-circuit structure of DC heating and AC discharge

enabling rapid response and precise control of electrode temperature within 50~300℃

while ensuring stable plasma generation. Through electrical measurements

optical diagnostics

and ammonia degradation experiments

the effects of electrode temperature on discharge characteristics

gas-phase reaction products and pollutant degradation effects are systematically investigated. Results show that increasing electrode temperature reduces breakdown voltage

enhances the reduced electric field

promotes N2 dissociation

and accelerates the transition from ozone to nitrogen oxides. In ammonia degradation experiments

the temperature- controlled SDBD system reduces degradation time by 43% and residual ozone by 73%. The study concludes that this system enables dynamic regulation of SDBD products

enhances pollutant degradation efficiency

and provides innovative technological pathways and theoretical support for plasma-based environmental applications.