Electrochemical gas sensor and electrolyte for an electrochemical gas sensor

An electrochemical gas sensor comprising at least one first electrode and at least one second electrode and an electrolyte for an electrochemical gas sensor, wherein the electrolyte contains at least one cyclic compound and at least 5 wt. % water, wherein the cyclic compound corresponds to formula (I) [(A)R1R2]+[Y]−;

• wherein (A) is a ring structure, which is selected from the group comprising pyridinium, piperidinium, pyrrolidinium, pyrrolium;
• wherein the radical R1 is arranged at the nitrogen atom of the ring structure A;
• wherein R1 is a hydrocarbon radical with 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12 C atoms;
• wherein R2 is a hydrogen atom or a hydrocarbon radical with 1, 2, 3 or 4 C atoms;
• and
• wherein Y is selected from the group comprising halide, cyanide, alkyl sulfonate, halogenated alkyl sulfonate, and acetate.

An electrochemical gas sensor process comprising the steps of:

• providing electrochemical gas sensor comprising at least one first electrode and at least one second electrode and an electrolyte for an electrochemical gas sensor, wherein the electrolyte contains at least one cyclic compound and at least 5 wt. % water, wherein the cyclic compound corresponds to formula (I) [(A)R1R2]+[Y]−;
• wherein (A) is a ring structure, which is selected from the group comprising pyridinium, piperidinium, pyrrolidinium, pyrrolium;
• wherein the radical R1 is arranged at the nitrogen atom of the ring structure A;
• wherein R1 is a hydrocarbon radical with 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12 C atoms;
• wherein R2 is a hydrogen atom or a hydrocarbon radical with 1, 2, 3 or 4 C atoms;
• and
• wherein Y is selected from the group comprising halide, cyanide, alkyl sulfonate, halogenated alkyl sulfonate, and acetate;
• and
• detecting SO2, NO2, O3 and/or H2S with the electrochemical gas sensor.