Large-scale cathodic carboxylation of copper surfaces

Jacques Simonet (1)

1 ISCR - Institut des Sciences Chimiques de Rennes

Large scale carboxylation of copper can easily be achieved by redn. of CO2 solubilised in aprotic polar solvents in the presence of tetramethylammonium salts (TMeA+ X-). Carbon dioxide could be inserted into the metal matrix (presumably in the form of the carbon dioxide anion radical) at high surface concns. (up to 10- 7 mol cm- 2), most probably organized in multi-layers. With significant amts. of electricity (> 0.1 × 10- 2 C cm- 2), this cathodic procedure leads to an impressive corrosion phenomenon. Importantly, the interfacial carboxylation of copper may efficiently protect the interface against anodic corrosion (gain up to ΔE ≈ + 1.3 V). Moreover, the insertion process is reversible and anodic oxidn. leads to release of gaseous CO2. Lastly, the external poly-carboxylated layers can easily be tailored to produce a variety of chem. modified interfaces.

Domaines: Matériaux

Jacques Simonet. Large-scale cathodic carboxylation of copper surfaces. Electrochemistry Communications, 2017, 76, pp.67-70. ⟨10.1016/j.elecom.2017.01.018⟩. ⟨hal-01475819⟩