A Nanocomposite of Bi Clusters and Bi2O2CO3 Sheets for Highly Efficient Electrocatalytic Reduction of CO2 to Formate

A Nanocomposite of Bi Clusters and Bi₂O₂CO₃ Sheets for Highly Efficient Electrocatalytic Reduction of CO₂ to Formate

Article Link: https://onlinelibrary.wiley.com/doi/10.1002/anie.202214959

研之成理推送：https://mp.weixin.qq.com/s/uEAZrL_urx4vrhqpBUW_bQ

Our article “A Nanocomposite of Bi Clusters and Bi₂O₂CO₃ Sheets for Highly Efficient Electrocatalytic Reduction of CO₂ to Formate” has been published in Angew. Chem. Int. Ed.

The renewable-electricity-driven CO₂ reduction to formic acid would contribute to establishing a carbon-neutral society. The current catalyst suffers from limited activity and stability under high selectivity and the ambiguous nature of active sites. Herein, we report a powerful Bi₂S₃-derived catalyst that demonstrates a current density of 2.0 A cm⁻² with a formate Faradaic efficiency of 93% at −0.95 V versus the reversible hydrogen electrode. The energy conversion efficiency and single-pass yield of formate reach 80% and 67%, respectively, and the durability reaches 100 h at an industrial-relevant current density. Pure formic acid with a concentration of 3.5 mol L⁻¹ has been produced continuously. Our operando spectroscopic and theoretical studies reveal the dynamic evolution of the catalyst into a nanocomposite composed of Bi⁰ clusters and Bi₂O₂CO₃ nanosheets and the pivotal role of Bi⁰−Bi₂O₂CO₃ interface in CO₂ activation and conversion.