Rational Design of Bi2O2CO3–C60 Nanosheet Heterostructures for Efficient Electrocatalytic CO2 Reduction with High Selectivity

Two-dimensional (2D) heterostructures have emerged as promising candidates for enhancing the performance of electrocatalysts in CO₂ reduction reactions. This study reports the successful synthesis of a Bi₂O₂CO₃–C₆₀ nanosheet (C₆₀ NS) heterostructure through a simple two-step solvothermal method for electrocatalytic CO₂ reduction. The heterostructure catalyst exhibits exceptional performance in electrocatalytic CO₂ reduction reactions, with high catalytic activity, excellent HCOOH selectivity (FE_HCOOH > 95% in the −0.7 V to −1.1 V vs RHE range) and remarkable stability (FE_HCOOH > 97%, over 36 h). LSV shows its catalytic activity advantage, with a current density of −57.71 mA cm^–2 at −1.0 V vs RHE. The outstanding performance originates from the synergistic effect between Bi₂O₂CO₃ and C₆₀ NS, which optimizes the electronic structure, promotes charge transfer, and generates abundant active sites for efficient CO₂ adsorption and conversion. Therefore, constructing such 2D heterostructures not only expands the application of C₆₀ NS in electrocatalysis but also offers valuable insights for developing high-performance electrocatalysts for CO₂ utilization, contributing to the advancement of this field.