Abstract
The construction of Cu-Bi bimetallic active sites presents a promising strategy to enhance the efficiency of electrocatalytic carbon dioxide reduction (CO2RR). However, achieving an optimal combination of Cu and Bi remains a significant challenge. In this work, we employed a straightforward one-pot hydrothermal method to synchronously introduce sulfur (S) into Cu-Bi catalysts. This approach facilitated an ingenious combination of Cu, Bi and S, resulting in strong synergistic interaction between the dual active sites. These interactions enhance the electrochemical active surface area (ECSA) and promote rapid electron transfer. As-synthesized Cu3BiS3 exhibits a unique capsule-like morphology and demonstrates superior electrocatalytic performance for CO2RR, achieving a Faradaic efficiency for formate production (FEHCOOH) of 88.8% at -0.986 V. Especially, the current density for HCOOH (JHCOOH) can reach 25.48 mA cm-2, accompanied by a long-term catalytic stability.
Published Version
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