Method for improving biological reduction of CO2 for electrosynthesis of acetic acid through graphene-foam copper composite cathode

Abstract

The invention belongs to the field of bioelectrochemistry, and particularly relates to a method for improving biological reduction of CO2 for electrosynthesis of acetic acid through a graphene-foam copper composite cathode. The method comprises the steps that firstly, microorganism culture is conducted; secondly, a double-chamber H-shaped electrolytic tank is constructed, the graphene-foam coppercomposite cathode is adopted as a cathode, microorganism fungi are inoculated into a cathode chamber of the double-chamber H-shaped electrolytic tank to be cultured, the electric potential of the electrode is -990 mV vs SHE, an anode chamber is continuously inflated with N2-CO2(80:20) gas, a cathode chamber is continuously inflated with N2-CO2-H2(83:10:7) gas at the beginning, after running is conducted for 5-6 days, continuous inflation of N2-CO2(80:20) gas is conducted, and running is continuously conducted for 10 days; and a fungus solution is collected, and the content of the acetic acid is measured. A method for acetic acid synthesis through an MES with graphene-foam copper composite materials as the cathode is provided, and the method has the high acetic acid production rate.

Description

Technical field [0001] The invention belongs to the field of bioelectrochemistry, and specifically relates to a graphene-foam copper composite cathode for improving biological reduction of CO 2 The method of electrosynthesis of acetic acid. Background technique [0002] With the rapid development of the global economy, the greenhouse gas CO 2 The issue of emissions has attracted the attention of all countries in the world. On the other hand, CO 2 As the most abundant carbon resource in the world today, it is of great economic significance to convert it into high value-added products. The microbial electrosynthesis system (MES, microbial electrosynthesis system) can reduce CO 2 The synthesis of a variety of high value-added products, such as methane, ethanol, formic acid and acetic acid, has attracted widespread attention. The use of microorganisms to produce metabolites shows very good application prospects because of their easy-to-obtain, environmentally friendly, and renewable...

AI Technical Summary

Problems solved by technology

The transfer mechanism of electrons from electrodes to cells involves genetic engineering. By introducing or changing a specific genome, this method requires professionals to design and repeat experiments countless times. The process is complicated and the probability of success is low.

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