Bismuth-based modified electrode, manufacturing method thereof and use thereof

A method of manufacturing a bismuth-based modified electrode, comprising a step of:

• immersing a copper substrate in an aqueous solution for 1 to 20 minutes to obtain the bismuth-based modified electrode;
• wherein the aqueous solution comprises a bismuth solution and KI solution, and a concentration of the KI solution ranges from 0.4 M to 3.0 M, and the bismuth solution comprises bismuth nitrate, bismuth carbonate, bismuth acetate, or bismuth citrate, and a concentration of the bismuth nitrate, a concentration of the bismuth carbonate, a concentration of the bismuth acetate, and a concentration of the bismuth citrate range from 20 mM to 40 mM, respectively,
• wherein the aqueous solution further comprises an oxidizing agent and the oxidizing agent comprises p-benzoquinone with a concentration between 0.5 mM and 50 mM, hydrogen peroxide with a concentration between 1 mM and 10 mM, or 2,2′-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) diammonium salt with a concentration between 1 mM and 10 mM;
• and
• immersing the copper substrate in an electrolyte with a concentration of 0.1 M and a pH between 7.0 and 9.2, and performing an electrochemical reduction at an applied potential between −0.5 V and −1.75 V vs. NHE for 30 minutes to 2 hours,
• wherein the electrolyte is selected from the group consisting of phosphate solution, borate solution, and carbonate solution.