{"title":"A Bi–Cu bimetallene array/carbonic anhydrase biohybrid for efficient and selective CO2 electroreduction at low concentration","authors":"Minli Shu, Xuefang Zhu, Zhe Wang, Xue Xiao, Shuni Li, Yu Chen, Yucheng Jiang","doi":"10.1039/d4ta05445h","DOIUrl":null,"url":null,"abstract":"The dramatic increase in CO<small><sub>2</sub></small> emission has caused extreme weather events in recent years. Electrocatalytic CO<small><sub>2</sub></small> reduction reaction (CO<small><sub>2</sub></small>RR) to useful fuels is an effective way of solving CO<small><sub>2</sub></small> emission. However, serious hydrogen reaction evolution interference and low Faraday efficiency restrict its large-scale application, especially at low CO<small><sub>2</sub></small> concentrations. This study presents a novel biohybrid comprising Bi–Cu bimetallenes (Bi–Cu BMLs) and carbonic anhydrase (CA) for efficient and selective electroreduction of CO<small><sub>2</sub></small> to formic acid at low CO<small><sub>2</sub></small> concentration. Ultra-thin Bi–Cu BMLs were synthesized <em>via</em> a facile galvanic replacement reaction, providing abundant sites for CA immobilization. The incorporation of Bi effectively suppresses the hydrogen evolution reaction and enhances the selectivity of the formic acid product, while the immobilized CA significantly increases the local CO<small><sub>2</sub></small> concentration at the electrode surface due to its exceptional CO<small><sub>2</sub></small> hydration activity and rapidly reversible equilibrium. As a result, the CA/Bi–Cu BML biohybrid system demonstrates remarkable performance, achieving 100% selectivity and 88.57% faradaic efficiency for formic acid production. Notably, the system maintains a high faradaic efficiency of 77.58% even at 5% CO<small><sub>2</sub></small> concentration. Furthermore, the biohybrid catalyst exhibits excellent stability and reusability, underscoring its potential for practical applications in dilute CO<small><sub>2</sub></small> streams.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":10.7000,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Chemistry A","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1039/d4ta05445h","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The dramatic increase in CO2 emission has caused extreme weather events in recent years. Electrocatalytic CO2 reduction reaction (CO2RR) to useful fuels is an effective way of solving CO2 emission. However, serious hydrogen reaction evolution interference and low Faraday efficiency restrict its large-scale application, especially at low CO2 concentrations. This study presents a novel biohybrid comprising Bi–Cu bimetallenes (Bi–Cu BMLs) and carbonic anhydrase (CA) for efficient and selective electroreduction of CO2 to formic acid at low CO2 concentration. Ultra-thin Bi–Cu BMLs were synthesized via a facile galvanic replacement reaction, providing abundant sites for CA immobilization. The incorporation of Bi effectively suppresses the hydrogen evolution reaction and enhances the selectivity of the formic acid product, while the immobilized CA significantly increases the local CO2 concentration at the electrode surface due to its exceptional CO2 hydration activity and rapidly reversible equilibrium. As a result, the CA/Bi–Cu BML biohybrid system demonstrates remarkable performance, achieving 100% selectivity and 88.57% faradaic efficiency for formic acid production. Notably, the system maintains a high faradaic efficiency of 77.58% even at 5% CO2 concentration. Furthermore, the biohybrid catalyst exhibits excellent stability and reusability, underscoring its potential for practical applications in dilute CO2 streams.
期刊介绍:
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.