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Electrochemical conversion of methane to bridge the gap in the artificial carbon cycle

Journal of Energy Chemistry 2025年第1期100卷 286-308页

作者： Yuhao Peng Yuefeng Song Ihar Razanau juanxiu xiao Wei xiao Di Hu Guoxiong Wang College of Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power Sources Wuhan University State Key Laboratory of Catalysis Dalian National Laboratory for Clean Energy iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Dalian Institute of Chemical Physics Chinese Academy of Sciences Laboratory of Physical-Chemical Technologies SSPA Scientific and Practical Materials Research Centre of NAS of Belarus State Key Laboratory of Marine Resources Utilization in South China Sea Collaborative Innovation Center of Marine Science and Technology School of Marine Science and Engineering Hainan University Department of Chemical and Environmental Engineering University of Nottingham Ningbo China

Methane, an abundant one-carbon（C1） resource, is extensively used in the industrial production of vital fuels and value-added chemicals. However, current industrial methane conversion technologies are energy-and carbon-intensive, mainly due to the high activation energy required to break the inert C–H bond, low selectivity, and problematic side reactions, including CO2emissions and coke deposition. Electrochemical conversion of methane（ECM） using intermittent renewable energy offers an attractive solution, due to its modular reactor design and operational flexibility across a broad spectrum of temperatures and pressures. This review emphasizes conversion pathways of methane in various reaction systems, highlighting the significance and advantages of ECM in facilitating a sustainable artificial carbon cycle. This work provides a comprehensive overview of conventional methane activation mechanisms and delineates the complete pathways of methane conversion in electrolysis contexts. Based on surface/interface chemistry, this work systematically analyzes proposed reaction pathways and corresponding strategies to enhance ECM efficiency towards various target products, including syngas, hydrocarbons, oxygenates, and advanced carbon materials. The discussion also encompasses opportunities and challenges for the ECM process, including insights into ECM pathways, rational electrocatalyst design, establishment of benchmarking protocols, electrolyte engineering, enhancement of CH4conversion rates, and minimization of CO2emission.

关键词： Methane Electrochemical conversion Reaction mechanism Catalyst design Electrode Electrocatalysis

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Modulation of Excitonic Confinement of TiO_(2)in Molten Salts for Overall CO_(2)Photoreduction

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Chinese Journal of Chemistry 2023年第10期41卷 1185-1190页

作者： Jing Wang Ren Sheng Dong Gu Yuhao Peng juanxiu xiao Yijun Shen Wei xiao College of Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power SourcesWuhan UniversityWuhan 430072China The Institute for Advanced Studies Wuhan UniversityWuhanHubei 430072China State Key Laboratory of Marine Resource Utilization in South China Sea Hainan UniversityHaikouHainan

Excitonic confinement greatly determines the charge carrier transport of photocatalysts.A molten salt modulation of excitonic con-finement is herein demonstrated as formation of ultrafine carbon-doped anatase TiO_(2)with grafted graphitic carbon nitride,which is rationalized as an excellent catalyst for overall CO_(2)*** with bulk TiO_(2),the carbon-doped TiO_(2)(M-TiO_(2))pos-sesses a weaker excitonic confinement to decrease exciton binding energy from 99 to 58 meV,consequently enhancing free-charge-carrier generation and *** Z-scheme electron transfer from M-TiO_(2)to C_(3)N_(4) is built,enhancing the CO_(2)conversion via the synchronous optimization of redox ability,CO_(2)activation,and^(*)COOH *** work highlights the unique chemistry of excitonic dissociation on facilitating separation of electron and hole,and also extends the scope of molten salt-mediated modulation of photocatalysis materials.

关键词： Molten salt CO_(2)reduction Photocatalysis Excitonic confinement Charge transfer

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Accelerated discovery of novel high-performance zinc-ion battery cathode materials by combining high-throughput screening and experiments

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Chinese Chemical Letters 2023年第8期34卷 315-321页

作者： Haoran Luo Jiangbin Deng Qianzhi Gou Omololu Odunmbaku Kuan Sun juanxiu xiao Meng Li Yujie Zheng MOE Key Laboratory of Low-grade Energy Utilization Technologies and Systems School of Energy and Power EngineeringChongqing UniversityChongqing 400044China State Key Laboratory of Marine Resource Utilization in South China Sea School of Chemical Engineering and TechnologyHainan UniversityHaikou 570228China

Aqueous zinc ion batteries(AZIBs)have attracted much attention in recent years due to their high safety,low cost,and decent electrochemical ***,the traditional electrodes development process requires tedious synthesis and testing procedures,which reduces the efficiency of developing highperformance battery ***,we proposed a high-throughput screening strategy based on firstprinciples calculations to aid the experimental development of high-performance spinel cathode materials for *** obtained 14 spinel materials from 12,047 Mn/Zn-O based materials by examining their structures and whether they satisfy the basic properties of *** their band structures and density of states,open circuit voltage and volume expansion rate,ionic diffusion coefficient and energy barrier were further evaluated by first-principles calculations,resulting in five potential *** of the promising candidates identified,Mg_(2)MnO_(4),was experimentally synthesized,characterized and integrated into an AZIB based cell to verify its performance as a *** Mg_(2)MnO_(4)cathode exhibits excellent cycling stability,which is consistent with the theoretically predicted low volume ***,at high current density,the Mg_(2)MnO_(4)cathode still exhibits high reversible capacity and excellent rate performance,indicating that it is an excellent cathode material for *** work provides a new approach to accelerate the development of high-performance cathodes for AZIBs and other ion batteries.

关键词： Aqueous zinc ion battery Spinel High-throughput First-principles calculations Experiment Accelerate

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Correlation of resistance switching and polarization rotation in copper doped zinc oxide(ZnO:Cu)thin films studied by Scanning Probe Microscopy

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Journal of Materiomics 2019年第4期5卷 574-582页

作者： juanxiu xiao Tun Seng Herng Yang Guo Jun Ding Ning Wang Kaiyang Zeng State Key Laboratory of Marine Resource Utilization in South China Sea Hainan UniversityNo.58Renmin AvenueHaikouHainan570228China Department of Mechanical Engineering National University of Singapore9 Engineering Drive 1Singapore117576 Department of Materials Science and Engineering National University of Singapore9 Engineering Drive 1Singapore117576

This paper presents multiple-modes Scanning Probe Microscopy(SPM)studies on characterize the correlation of resistance switching(RS)and polarization rotation(PR)in copper doped ZnO(ZnO:Cu)thin ***,the bipolar RS behavior is confirmed by conductive Atomic Force Microscopy(c-AFM).The PR with almost 180phase angle is confirmed by using the Piezoresponse Force Microscopy(PFM)on the same *** addition,it elucidates that obvious PR behavior can be observed in the sample with increasing Cu concentration by combining Kelvin Probe Force Microscopy(KPFM).Furthermore,it is found that the region with downward polarization has low resistance state(LRS),whereas the region with upward polarization has high resistance state(HRS).Moreover,the Piezoresponse Force Spectroscopy(PFS)and Switching Spectroscopy PFM(SS-PFM)measurements further confirm that the existence of the built-in voltage,V_(built-in) is largest in the ZnO:Cu(8 at.%)film deposited at the oxygen partial pressure of 2×10^(-4) *** schematic diagrams of energy band diagram with varied built-in field,Ebuilt-in,polarization directions and redistributed charges are presented to explain the correlation between RS and PR behavior.

关键词： Resistive switching Polarization rotation Built-in voltage ZnO:Cu thin film Next generation memory

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Introducing sulfur to nickel-iron selenide for high-efficiency alkaline seawater electrolysis

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Science China Chemistry 2024年第8期67卷 2747-2754页

作者： Xuanwa Chen Yanhui Yu Xingqi Han Huan Wang Yingjie Hua Daoxiong Wu Peilin Deng juanxiu xiao Xinlong Tian Jing Li School of Marine Science and Engineering Hainan Provincial Key Lab of Fine ChemistrySchool of Chemistry and Chemical EngineeringHainan UniversityHaikou 570228China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province School of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou 571158China

Seawater electrolysis is an effective way to obtain hydrogen(H_(2))in a sustainable ***,the lack of electrocatalysts with high activity,stability,and selectivity for oxygen evolution reaction(OER)severely hinders the development of seawater electrolysis ***,sulfur-doped nickel-iron selenide nanosheets(S-NiFeSe_(2))were prepared by an ion-exchange strategy and served as highly active OER electrocatalyst for alkaline seawater *** overpotential is 367 m V,and it can run stably for over 50 h at 100 m A cm^(-2).Excitingly,the S-NiFeSe_(2)||Pt/C pair exhibits cell voltage of 1.54 V at 10 m A cm^(-2)under alkaline seawater conditions,which can run smoothly for 100 h without decay,and the efficiency of electricity-tohydrogen(ETH)energy conversion reaches more than 80%.Such electrode,with abundant accessible reactive sites and good corrosion resistance,is a good candidate for seawater ***,density functional theory calculations reveal that the surface sulfur atoms can activate the adjacent Ni sites and decrease the free energy changes of the associated intermediates at the adjacent Ni sites for OER,and the step of~*OH→~*O is the potential rate-limiting *** this work,the true reactive site in nickel-iron selenides is the Ni sites,but not the Fe sites as commonly believed.

关键词： S-doping nickel-iron selenide electrocatalysts oxygen evolution reaction alkaline seawater electrolysis

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防污无光釉的显微结构分析及其防污性能研究

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陶瓷学报 2021年第5期42卷 855-862页

作者：余辉朱玲龙南黄检刘梦任一鹏李建保陈拥军肖娟秀萍乡学院材料与化学工程学院江西萍乡337055 海南大学材料科学与工程学院海南海口570228

陶瓷作为在公共场合被广泛使用的一类产品,其釉面的防污性和易清洁性对公共卫生有着重要的影响。通过研究不同ZrSiO_(4)添加量(10 wt.%-40 wt.%)和烧结温度(1150℃-1210℃)对釉面显微结构、白度、光泽度和防污性能的影响,并采用有限元... 详细信息

陶瓷作为在公共场合被广泛使用的一类产品,其釉面的防污性和易清洁性对公共卫生有着重要的影响。通过研究不同ZrSiO_(4)添加量(10 wt.%-40 wt.%)和烧结温度(1150℃-1210℃)对釉面显微结构、白度、光泽度和防污性能的影响,并采用有限元法分析釉面显微结构对污渍液滴的铺展以及水流冲洗情况的影响。结果表明,与其他含量相比,当ZrSiO_(4)添加量为40 wt.%时,不同温度下样品的光泽度和白度分别呈现最低和最高,但都具有良好的防污性。这归功于其表面的微乳突结构,该结构不仅对污渍液滴的铺展起到抑制作用,而且相对于微凹槽结构有更好的易清洁性。因此,通过在无光釉表面构建乳突结构,不仅能提高其无光性,而且可提高釉面的防污和易清洁性。

关键词：无光釉易清洁性防污性微乳突结构有限元法

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