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Pulsed electrolysis of carbon dioxide by large-scale solid oxide electrolytic cells for intermittent renewable energy storage

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Carbon Energy 2023年第4期5卷 2-12页

作者： Anqi Wu Chaolei Li Beibei Han Wu Liu Yang Zhang svenja hanson Wanbing Guan Subhash C.Singhal Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingboZhejiangChina Faculty of Science and Engineering University of Nottingham Ningbo ChinaNingboZhejiangChina

CO_(2) electrolysis with solid oxide electrolytic cells(SOECs)using intermittently available renewable energy has potential applications for carbon neutrality and energy *** this study,a pulsed current strategy is used to replicate intermittent energy availability,and the stability and conversion rate of the cyclic operation by a large-scale flat-tube SOEC are *** hundred cycles under pulsed current ranging from -100 to -300 mA/cm^(2) with a total operating time of about 800 h were carried *** results show that after 100 cycles,the cell voltage attenuates by 0.041%/cycle in the high current stage of−300 mA/cm^(2),indicating that the lifetime of the cell can reach up to about 500 *** total CO_(2) conversion rate reached 52%,which is close to the theoretical value of 54.3% at -300 mA/cm^(2),and the calculated efficiency approached 98.2%,assuming heat *** study illustrates the significant advantages of SOEC in efficient electrochemical energy conversion,carbon emission mitigation,and seasonal energy storage.

关键词： carbon dioxide cyclic electrolysis pulse current solid oxide electrolytic cells

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Dual atomic catalysts from COF-derived carbon for CO_(2)RR by suppressing HER through synergistic effects

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Carbon Energy 2023年第6期5卷 92-103页

作者： Minghao Liu Sijia Liu Qing Xu Qiyang Miao Shuai Yang svenja hanson George Zheng Chen Jun He Zheng Jiang Gaofeng Zeng CAS Key Laboratory of Low‐Carbon Conversion Science and Engineering Shanghai Advanced Research Institute(SARI)Chinese Academy of Sciences(CAS)ShanghaiPeople's Republic of China Department of Chemical and Environmental Engineering University of Nottingham Ningbo ChinaNingboPeople's Republic of China School of Chemical Engineering University of Chinese Academy of SciencesBeijingPeople's Republic of China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of ScienceShanghaiPeople's Republic of China Department of Chemical and Environmental Engineering University of NottinghamNottinghamUK

The electrochemical carbon dioxide reduction reaction(CO_(2)RR)for highvalue-added products is a promising strategy to tackle excessive CO_(2) ***,the activity of and selectivity for catalysts for CO_(2)RR still need to be improved because of the competing reaction(hydrogen evolution reaction).In this study,for the first time,we have demonstrated dual atomic catalytic sites for CO_(2)RR from a core-shell hybrid of the covalent-organic framework and the metal-organic *** to abundant dual atomic sites(with CoN_(4)O and ZnN_(4) of 2.47 and 11.05 wt.%,respectively)on hollow carbon,the catalyst promoted catalysis of CO_(2)RR,with the highest Faradic efficiency for CO of 92.6%at-0.8 V and a turnover frequency value of 1370.24 h^(-1) at-1.0 *** importantly,the activity and selectivity of the catalyst were well retained for 30 *** theoretical calculation further revealed that CoN_(4)O was the main site for CO_(2)RR,and the activity of and selectivity for Zn sites were also improved because of the synergetic roles.

关键词： carbon dioxide reduction reaction covalent-organic frameworks dual atomic catalysts metal-organic frameworks single-atom catalysts

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Synthesis of a highly recoverable 3D MnO2/rGO hybrid aerogel for efficient adsorptive separation of pharmaceutical residue

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Journal of Environmental Sciences 2022年第8期34卷 194-203页

作者： Billie Yan Zhang Hiew Wan Ting Tee Nicholas Yung Li Loh Kar Chiew Lai svenja hanson Suyin Gan Suchithra Thangalazhy-Gopakumar Lai Yee Lee Department of Chemical and Environmental Engineering University of Nottingham MalaysiaJalan Broga43500 SemenyihSelangor Darul EhsanMalaysia Department of Chemical and Environmental Engineering University of Nottingham Ningbo ChinaNingbo 315100China

Water contamination by non-steroidal anti-inflammatory drugs,such as acetaminophen,is an emerging ecological *** this study,a newthree-dimensionalmanganese dioxideengrafted reduced graphene oxide(3D MnO_(2)/rGO)hybrid aerogel was developed for acetaminophen *** synthesis involved firstly the self-assembly of GO aerogel,followed by thermal reduction and in-situ MnO_(2) growth by *** aerogel demonstrated interlinked planes with smooth surfaces deposited with MnO_(2) nanospheres and pores of 138.4–235.3μm *** influences of adsorbent dosage,initial pH,acetaminophen concentration,temperature and contact time were *** was determined that the adsorption of acetaminophen occurred on uniform sorption sites in the aerogel,as suggested by the best fit of data to the Langmuir isotherm,yielding a maximum adsorption capacity of 252.87 mg/*** highest adsorption performance of the 3D MnO_(2)/rGO aerogel was attained at a dosage of 0.6 g/L,initial pH of 6.2 and temperature of 40℃.The process kinetics were in-line with the pseudo-first-order and pseudo-second-order kinetics at 10 and 20–500 mg/L concentrations,*** assay showed the spontaneity and endothermicity features of the 3D MnO_(2)/rGO-acetaminophen *** acetaminophen adsorption mechanisms were mainly hydrogen bonding and pore ***,the as-synthesised aerogel was effectively regenerated using acetone and re-utilised in four adsorption-desorption ***,the results highly recommend the implementation of the 3D MnO_(2)/rGO hybrid aerogel for purification of wastewater polluted by acetaminophen residue.

关键词： Acetaminophen Adsorption Adsorption mechanism 3D reduced graphene oxide Manganese oxide nanoparticles Regeneration

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