Coupling post-modification with reconstruction over Co-based metal–organic frameworks for electrochemical collective value-added recycling of nitrate and sulfion in wastewater

文献信息

发布日期 2023-10-24
DOI 10.1039/D3TA04629J
影响因子 12.732
作者

Tianlun Ren, Huizhen Wang, Shan Xu, Hongjie Yu, Kai Deng, Ziqiang Wang, Hongjing Wang, Liang Wang, You Xu


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摘要

Integrating electrochemical nitrate reduction to ammonia (NRA) and the sulfion oxidation reaction (SOR) to construct a coupled electrolysis system is expected to realize the collective value-added recycling of nitrate and sulfion wastes. In this study, we developed a dimethylamineborane (DMAB)-involved post-modification strategy to convert pre-synthesized Co-MOF/NF into DMAB–Co-MOF/NF, which could serve as a bifunctional precatalyst and in situ reconstructed into heterogeneous CoOOH/Co(OH)2/NF (for NRA) and amorphous B–Co–S/NF (for SOR) as active phases under electrocatalytic conditions, respectively. With demonstrated excellent nitrate-to-ammonia activity over the reconstructed CoOOH/Co(OH)2/NF (NH3 yield rate: 0.238 mmol h−1 cm−2 and NH3 faradaic efficiency: 94.16%) and enhanced sulfion recycling capability over the reconstructed B–Co–S/NF (100 mA cm−2 of the SOR@0.268 V vs. the reversible hydrogen electrode), coupling NRA to the SOR based on these two electrocatalysts could realize energy-efficient collective value-added recycling of nitrate and sulfion into ammonia and sulfur (50 mA cm−2@1.062 V cell voltage).

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来源期刊

Journal of Materials Chemistry A

Journal of Materials Chemistry A
CiteScore: 19.5
自引率: 4.7%
年发文量: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment

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