Скачать или смотреть Electrochemical reduction of CO2

This video shows a DIY two-compartment electrochemical cell powered by a 9V battery that is used to convert dissolved carbon dioxide in carbonated water to CO. The latter can be further converted to renewable fuels via FTS process. The concentration of forming CO is analyzed by a hand-held CO meter connected to the headspace of the cathodic half-cell (the cathode here is a copper wire, the anode is a nickel wire).

The cathode composition is very important: if the material of the cathode is changed from copper to nickel or stainless steel, no CO is produced, because in this case water reduction to hydrogen gas takes place instead of CO2 reduction to CO. In other words, copper is electrocatalytically active towards CO2 electrolysis, while nickel and stainless steel are not.

This video is a part of undergraduate chemistry laboratory experiment published by our group in the Journal of Chemical Education. You can find further explanations, full details of the experiment, student handouts and instructor materials here: https://pubs.acs.org/doi/10.1021/acs....