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Diamond decorated with copper nanoparticles for electrochemical reduction of carbon dioxide

: Yang, N.; Gao, F.; Nebel, C.E.


Analytical chemistry 85 (2013), Nr.12, S.5764-5769
ISSN: 0003-2700
ISSN: 1520-6882
Fraunhofer IAF ()

Electrochemical CO2 reduction has been investigated on a planar diamond electrode in aqueous and nonaqueous solutions. On a diamond electrode decorated with copper nanoparticles, CO2 reduction starts from -0.1 V versus a normal hydrogen electrode (NHE) when a mixture of water and ionic liquid ([H2O] = 10 M) is used. The current density reaches 5.1 ± 0.1 mA cm-2 for CO2 reduction at a potential of -1.3 V versus NHE. The main products are formic acid and formaldehyde. Moreover, the electrode system is stable and has a long lifetime. It is thus promising to be applied in the future for mass production of industrial chemicals and liquid fuels using CO2 as the source of raw material.