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In-situ construction of abundant active centers on hierarchically porous carbon electrode toward high-performance phosphate electrosorption: Synergistic effect of electric field and capture sites

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Green Energy & Environment 2024年第1期9卷 126-137页

作者： Peng Zhang Fukuan Li Mingming He Silu Huo Xueli Zhang Benqiang Cen Dezhi Fang Kexun Li Hao Wang College of Environmental Science and Engineering Nankai UniversityTianjin300350China MOE Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Remediation and Pollution ControlTianjin Key Laboratory of Environmental Technology for Complex Trans-Media PollutionNankai UniversityTianjin300350China State Key Laboratory of Simulation and Regulation of Water Cycles in River Basins China Institute of Water Resources and Hydropower ResearchBeijing100038China

Phosphate removal is crucial for eutrophication control and water quality improvement.Electro-assisted adsorption,an eco-friendly elec-trosorption process,exhibited a promising potential for wastewater treatment.However,there are few works focused on phosphate electro-sorption,and reported electrodes cannot attach satisfactory removal capacities and rates.Herein,electro-assisted adsorption of phosphate via in-situ construction of La active centers on hierarchically porous carbon(LaPC)has been originally demonstrated.The resulted LaPC composite not only possessed a hierarchically porous structure with uniformly dispersed La active sites,but also provided good conductivity for interfacial electron transfer.The LaPC electrode achieved an ultrahigh phosphate electrosorption capability of 462.01 mg g^(-1) at 1 V,outperforming most existing electrodes.The superior phosphate removal performance originates from abundant active centers formed by the coupling of electricﬁeld and capture sites.Besides,the stability and selectivity toward phosphate capture were maintained well even under comprehensive conditions.Moreover,a series of kinetics and isotherms models were employed to validate the electrosorption process.This work demonstrates a deep understanding and promotes a new level of phosphate electrosorption.

关键词： Electro-assisted adsorption Electrosorption Phosphate removal active centers MOF-derived carbon

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Two-dimensional covalent organic frameworks for electrocatalysis:Achievements,challenges,and opportunities

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Nano Research 2023年第7期16卷 8570-8595页

作者： Ruoyu Zhao Teng Wang Junjun Li Yongxia Shi Man Hou Yong Yang Zhicheng Zhang Shengbin Lei Department of Chemistry School of Science&Tianjin Key Laboratory of Molecular Optoelectronic SciencesTianjin UniversityTianjin 300072China State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal MaterialsNorthwestern Polytechnical UniversityXi’an 710072China

Covalent organic frameworks(COFs)represent an emerging class of crystalline porous polymers with high porosity,good stability,and adjustable structure,and their excellent characteristics lay a solid foundation for electrocatalysis.This review systematically introduces the design principles of the catalytic sites in two-dimensional(2D)COF-based electrocatalysts and analyzes the relationship between 2D COF structure and their electrocatalytic performances.In particular,the recent progress in the field of 2D COFs as electrocatalysts is comprehensively summarized.Finally,we discuss the current shortcomings and challenges on tailoring 2D COF for high-performance electrocatalysts in details,and look forward to promoting more researches on 2D COF-based electrocatalysts.

关键词： covalent organic frameworks electrocatalysts two-dimensional active centers

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