FCF-LDH/BiVO4 with synergistic effect of physical enrichment and chemical adsorption for efficient reduction of nitrate

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外文摘要：Photoelectrochemical NO3-reduction(PEC NITRR)not only provides a promising solution for promoting the global nitrogen cycle,but also converts NO3-to the important chemicals(NH3).However,it is still a great challenge to prepare catalysts with excellent NO3-adsorption/activation capacity to achieve high NITRR.Herein,we designed a novel Fe2+Cu2+Fe3+LDH/BiVO4(FCF-LDH/BVO)catalyst with synergistic effect of chemical adsorption and physical enrichment.Fe2+in FCF-LDH/BVO provides the rich Lewis acid sites for the adsorption of NO3-,and the appropriate layer spacing of FCF-LDH further promotes the physical enrichment of NO3-in its interior,thus realizing the effective contact between NO3-and active sites(Fe2+).FCF-LDH/BVO showed excellent NH3 production performance(FENH3=66.1%,rNH3=13.8 μg h-1 cm-2)and selectivity(FENO2-=2.5%,rNO2-=4.9 μg h-1 cm-2)in 0.5 mol L-1 Na2SO4 electrolyte.In addition,FCF-LDH/BVO maintains the desirable PEC stability for six cycle experiments,showing great potential for practical application.The 14NO3-and 15NO3-isotope test provides strong evidence for further verification of the origin of N in the generated NH3.This LDH catalyst has a great potential in PEC removal of NO3-from groundwater.

外文关键词：

LDHLewis acid sitesPhysical enrichmentPhotoelectrochemical NO3-ReductionAmmonia

作者：

Yajie Bai、Zhenyuan Fang、Yong Lei、Lijing Liu、Huaiquan Zhao、Hongye Bai、Weiqiang Fan、Weidong Shi

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作者单位：

School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang,212013,China

School of Chemistry,Beihang University,Beijing,100191,China

Institute of Physics&IMN MacroNano,Technische Universität Ilmenau,Ilmenau,98693,Germany

基金：

国家自然科学基金Jiangsu Province and Education Ministry Co-Sponsored Synergistic Innovation Center of Modern Agricultural EquipmentJiangsu Province Innovation Support Program International Science and Technology Cooperation Project

项目编号：

22075112XTCX2027BZ2022045

出版年：

2024

DOI：

10.1016/j.gee.2023.05.011

绿色能源与环境(英文)

CSTPCD

ISSN：

年,卷(期)：2024.9(7)