Ionic liquids are organic salts consisted of only ions utterly, which are liquids with the melting point close to or below room temperature. The unique physical and chemical properties make them suitable for many applications. In this thesis, ionic liquid carbon paste electrodes (CILEs) and eight kinds of chemically modified electrodes are fabricated based on imidazolium and pyridinium ionic liquids. The electrochemical behaviors of four compounds, and direct electrochemistry and electrocatalytic act...