Bi-Modified Zn Catalyst for Efficient CO₂ Electrochemical Reduction to Formate

Abstract

Developing\nefficient and low-cost catalysts is the key part for\nelectrochemical reduction of CO₂, and the bimetallic approach\nis a cost-effective strategy to find promising electrocatalysts for\nCO₂ reduction. Herein, a low-cost Bi-modified Zn catalyst\nwith nanoparticle morphologies was developed for electrochemical CO₂ reduction to formate. The catalyst was prepared through a\nsurface modification with a simple method. A maximum formate Faradaic\nefficiency of 94% was achieved at −0.8 V vs RHE. The high density\nof active sites offered by the metal–metal bifunctional interfaces\nand grain boundaries is the main factor determining the excellent\nperformance of the Zn-Bi bimetallic catalyst.