Device and method for separating off contaminants

A device for separating off liquid and particulate contaminants from a gas flow, the device comprising:

• at least one first electrode;
• at least one second electrode;
• a flow path of the gas flow runs between the at least one first electrode acting as a counter electrode and the at least one second electrode acting as an emitter electrode and having an electrode end oriented in a direction of the at least one first electrode;
• wherein a direct-current voltage exceeding a breakdown voltage is applied between the at least one first electrode and the at least one second electrode in order to form a stable low-energy plasma, wherein the at least one second electrode extends substantially along a first axis in a first direction and each of the at least one first electrode has a plateau region which is arranged opposite the at least one second electrode and which extends in a first plane running substantially perpendicular to the first direction, wherein the plateau region is connected to a base level by a spacer element extending against the first direction, further wherein the plateau region is connected to the spacer element by at least one connecting element that runs substantially perpendicular to the first direction.