Tin-based materials have been regarded as good candidates for the electrochemical conversion of CO2 into formic acid due to environmental friendliness, non-toxicity, and low cost. However, tin-based materials still face the challenges of unsatisfactory selectivity due to the limitation of charge transfer. In this work, Se or S elements were introduced in the tin-based materials through the electrodeposition process to improve their selectivity of CO2 reduction to formate. Among them, the SnSe@NF electrode demonstrated excellent selectivity with a Faradaic efficiency (FE) of 80.6% for the production of formate and perfect stability through 35 h stable operation at the current density of −10 mA cm−2. This proof-of-concept study establishes a relationship between enhanced performance and species dopant on Tin material and provides a practicable and scalable avenue for rational engineering of high-powered electrocatalysts.
