electrochemical behaviour and deposition of indium in electrolytes composed of 0.4 mol dm−3 In(Tf2N)3 and 0.4 mol dm−3 InCl3 in the solvents 1,2-dimethoxyethane and poly(ethylene glycol) (average molecular mass of 0.400 kg mol−1, PEG400) was investigated. Indium(I) was identified as the intermediate species that disproportionated to indium(III) and indium(0) nanoparticles. The presence of nanoparticles