Controllable Reconstruction of β-Bi<sub>2</sub>O<sub>3</sub>/Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> Composite for Highly Efficient and Durable Electrochemical CO<sub>2</sub> Conversion.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40202235.
- Also identified by DOI 10.1021/acs.nanolett.5c00417 and PMC identifier 12023034.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
The uncontrollable electrochemical reduction reconstruction, leading to the destruction of well-defined structure and subsequent low durability, is the main obstacle to the catalytic performance of Bi-based composites toward electrochemical CO<sub>2</sub> reduction reaction (eCO<sub>2</sub>RR). Herein, we address this issue through construction of a novel β-Bi<sub>2</sub>O<sub>3</sub>/Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> composite, which can resist the reduction reconstruction of Bi-based materials to metallic Bi during the eCO<sub>2</sub>RR process by modulating a more alkaline microenvironment that facilitates the formation of new Bi-O bonds. The synergistic interactions and directional electron transfer between the β-Bi<sub>2</sub>O<sub>3</sub> and Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> components, together with the stable composite structure, result in its superior activity and selectivity for formate production with high faradaic efficiencies (FEs) over 94% from -0.7 to -1.1 V, and remarkable durability with maintenance of 80% FE after continuous electrocatalysis of 720 h. This work sheds new light on designing advanced high-performance nanomaterials toward eCO<sub>2</sub>RR and other practical applications.