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Recent Advances in Microenvironment Engineering for Selective Electrochemical C-N Coupling.

Jianping Bai1, Xinhai Cai1, Xin Liu2

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Microenvironment engineering optimizes electrochemical C-N coupling by controlling catalysts, electrolytes, and dynamic methods. This enhances selectivity for valuable compounds like urea and amines from CO2 and nitrogen sources.

Keywords:
electrocatalystselectrochemical C–N couplingmicroenvironmentspH and cation effectspulsed electrolysis

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Area of Science:

  • Electrochemistry
  • Sustainable Chemistry
  • Catalysis

Background:

  • Electrochemical C-N coupling offers a sustainable pathway for synthesizing C-N compounds from CO2 and nitrogenous species.
  • Challenges include competing reaction pathways and intermediate kinetics that limit product selectivity (e.g., urea, amines, amides).
  • Modulating the electrochemical microenvironment is a promising strategy to overcome these limitations.

Purpose of the Study:

  • To systematically review how microenvironment engineering can enhance C-N coupling efficiency and selectivity.
  • To categorize key strategies for microenvironment control in C-N coupling.
  • To draw parallels with established CO2 and NOx reduction reactions.

Main Methods:

  • Catalyst-centered design: ligand coordination, defect engineering, morphology control.
  • Ionic and electrolyte modifications: cation and pH effects.
  • Dynamic approaches: pulsed electrolysis.

Main Results:

  • These strategies modify local fields, surface coverage, and mass transport.
  • Effective microenvironment control steers reactants towards desired cross-coupling reactions.
  • Demonstrated success in enhancing C-N coupling efficiency and selectivity.

Conclusions:

  • Microenvironment engineering is crucial for advancing electrochemical C-N coupling.
  • Parallels with CO2RR/NOxRR highlight the potential of these strategies.
  • Future work should focus on improving activity, selectivity, and atom economy.