In situ reconstructed AgZn3 nanoparticles supported on zinc nanoplates for efficient CO2 electroreduction to tunable syngas

Abstract

Developing efficient electrocatalysts for CO₂ reduction to syngas with tunable H₂/CO ratios and high total faradaic efficiency is challenging. Herein, we report an effective catalyst composed of in situ reconstructed AgZn₃ nanoparticles and Zn nanoplates for syngas synthesis, showing nearly 100% Faraday efficiency to syngas with a tunable H₂/CO ratio from 2 : 1 to 1 : 2. Moreover, the in situ electrochemical measurements coupled with theoretical calculations disclose that the Zn site in AgZn₃ nanoparticles and the hollow site between Ag and Zn in AgZn₃ are the possible active sites for CO and H₂ generation, respectively. This work has guiding significance for designing dual site catalysts for CO₂ electroreduction to tunable syngas.