Sb-doped SnS2 nanosheets enhance electrochemical reduction of carbon dioxide to formate

다국어 초록 (Multilingual Abstract)

Electrocatalytic carbon dioxide (CO2) is a forward-looking strategy to convert renewable energy into fuel.
Herein, we show that the novel Sb-doped SnS2 nanosheets were synthesized by a simple hydrothermalmethod for efficient electroreduction of CO2, and the atomic ratio of Sb/Sn was controllable. The introductionof Sb significantly enhanced the current density and Faradaic efficiency for formate products comparedto pristine SnS2 nanosheets. When the Sb content was 1%, the Sb-SnS2 nanosheets achieved aremarkable Faradaic efficiency of 90.86% for formate products at 1.1 V vs. RHE. The experimental resultsshowed that 1% Sb-doped SnS2 nanosheets changed the electronic structure of the Sn element, allowingthe catalyst to reconfigure to generate Sn0 during the electrochemical reaction, while the singlet tin had asynergistic effect with Sn4+, making it easier to transport electrons on the surface and promoting the activationprocess of CO2, which is a key factor to improve the electroreduction performance of CO2.