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New cobalt complexes act as electrocatalysts for tosic acid reduction. The trimetallic Co(III)/Co(II)/Co(III) catalyst shows efficient homogeneous operation with a low onset overpotential.

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Area of Science:

  • Inorganic Chemistry
  • Electrochemistry
  • Catalysis

Background:

  • Cobalt complexes are investigated for catalytic applications.
  • Electrocatalytic reduction of acids is crucial for various chemical processes.
  • Developing efficient and homogeneous catalysts remains a key challenge.

Purpose of the Study:

  • To synthesize and characterize novel linear trimetallic cobalt complexes.
  • To evaluate their electrocatalytic activity for tosic acid reduction.
  • To understand the catalytic mechanism and operational characteristics.

Main Methods:

  • Synthesis of linear trimetallic cobalt complexes with bridging acyl-alkoxy ligands.
  • Electrochemical studies in acetonitrile to assess catalytic performance.
  • Analysis of overpotential and turnover frequency for catalytic efficiency.

Main Results:

  • The Co(III)/Co(II)/Co(III) complexes demonstrated electrocatalytic activity for tosic acid reduction.
  • The -OCMe2CH2COMe complex exhibited homogeneous catalytic behavior.
  • A modest onset overpotential of 175 mV and a turnover frequency of approximately 80 s⁻¹ at 300 mV were achieved.

Conclusions:

  • Linear trimetallic cobalt complexes are effective electrocatalysts for tosic acid reduction.
  • The studied complex operates homogeneously with promising efficiency.
  • These findings contribute to the development of advanced catalytic systems.