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Nickel (II) azamacrocycle; electrocatalytic reduction of CO₂; electrochemical reduction

With the aim of finding a suitable electrocatalyst for the efficient reduction of carbon dioxide, the electrochemistry of nickel (II) complex of 1,3,6,9,11,14-hexaazatricyclo [12·2·1·1] octadecane was studied using cyclic voltammetry (CV) and controlled-potential electrolysis (CPE) techniques in the presence and absence of CO₂ in 100% H₂O, CH₃CN-H₂O mixtures (20–100%) and DMF-H₂O (70–100%) mixtures. The efficiency of this process is determined using the coulometry technique. CO is the major product in the gaseous phase and HCOOH the sole product formed in the solution phase.

M Aulice Scibioh¹ P V Ragini² S Rani² V R Vijayaraghavan² B Viswanathan¹

1. Kinetics and Catalysis Laboratory, Department of Chemistry, Indian Institute of Technology, Chennai - 600 036, India
2. Department of Physical Chemistry, University of Madras, Chennai - 600 025, India

Published

August 2001

Manuscript received

3 April 2001

Manuscript revised

14 June 2001