Abstract
Evidence is presented that copper, silver, and their alloys with palladium, may display an exceptional reactivity in the contact of α,ω-alkanes [Br–(CH 2) n –Br]. Thus, the use of coppered surfaces as cathode materials shows a spectacular potential shift ( ΔE ≈ 1 V) for the main reduction step when compared to glassy carbon taken as a standard interface. Such cathodic reactions are particularly easy and fast with 1,3-dibromopropane ( DB3). Thus, it is expected that a preliminarily transient [(CH 2) 3Cu (II),2Br −] monomer or polymer, is formed: the indirect reduction by use of 3D electrodes from copper powder in suspension may produce at electrified surfaces (made of glassy carbon, platinum, or nickel) fine deposits of copper nano-particles. Oppositely, silver (essentially by means of Ag–Pd alloy employed as cathode material) reacts with each C–Br bond and the observed cathodic behaviour is uniform with all α,ω-alkanes. A special attention is drawn on the nature of modified surfaces and the enhancement of catalysis kinetics brought by the use of copperized and silverized electrodes.
Published Version
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