New approaches for developing transient electrochemical multi-component gas sensors

Abstract According to the thin-layer electrochemistry and transient electrochemistry principles, both all-new approaches for developing transient electrochemical multi-component gas sensors — “porous thin-layer electrode coulometry (PTLEC)” and “modulated pulse potential amperometry (MPPA)” were proposed in this paper. As compared with steady electrochemical methods for conventional electrochemical gas sensors, they have made a new breakthrough in optimizing the gas sensing performance characteristics and developing the sensor functions, as illustrated by the case of detection of O 2 +N 2 O (gas anaesthetic) and O 2 +CO 2 (biorespiratory gases) gas mixtures.