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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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Effect of Alloyed Mo on Mechanical Properties,Biocorrosion and Cytocompatibility of As-Cast Mg-Zn-Y-Mn Alloys

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Acta Metallurgica Sinica(English Letters) 2020年第4期33卷 500-513页

作者： Longlong Zhang Yatong Zhang Jinshan Zhang Rui Zhao Jiaxin Zhang Chunxiang Xu College of materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China 2 shanxi key laboratory of advanced magnesium-based materials Taiyuan 030024China

The influences of Mo contents on mechanical properties,biocorrosion and cytocompatibility of as-cast Mg-6Zn-8.16Y-2.02Mn-xMo(x=0.0,0.1,0.3,0.5,0.7 wt%) alloys were firstly *** amount of Mo was conducive to grain refinement and the formation of long-period stacking ordered structure with continuous distribution,which was advantageous to mechanical properties and corrosion ***-6Zn-8.16Y-2.02Mn-0.3Mo exhibited the ultimate tensile strength of 265.0 MPa,elongation of 13.5% and the lowest weight loss rate in Hank’s ***,the cell toxicity cultured in 25% extract was evaluated and the alloy with 0.3 wt% Mo exhibited the best ***,the alloy was expected to become a novel biodegradable implant material.

关键词： magnesium alloy Mo Corrosion Cytocompatibility Mechanical properties

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Near-perfect replication on amorphous alloys through active force modulation based on machine learning/neural network parameter prediction

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 181-191页

作者： Senkuan Meng Zheng Wang Ruisong Zhu Ruijie Liu Jiang Ma Lina Hu Weihua Wang key laboratory for Liquid-Solid Structural Evolution and Processing of materials (Ministry of Education) School of Materials Science and Engineering Shandong University College of Mechatronics and Control Engineering Shenzhen University Songshan Lake materials laboratory Institute of Physics Chinese Academy of Sciences

As a microforming technique, micro/nano-structural replication possesses advantages of high precision and efficiency. With the remarkable superplasticity in the supercooled liquid region, amorphous alloys or metallic glasses(MGs) are regarded as ideal materials for miniature fabrication. However, due to the intrinsic metastable nature of supercooled liquids, the design of imprinting processes for MGs poses a challenge. In the past, process parameters have largely relied on trial-and-error *** this work, a low-frequency active force modulation system is employed to apply a stable, precise, and real-time feedback stress field for imprinting of MG samples. Low-frequency vibrations can facilitate the filling of microstructures on the template surface by reducing the effective viscosity of the supercooled liquid. With the dataset composed of orthogonal experiments, a machine learning strategy based on back-propagation(BP) neural networks was utilized to construct a 3D parameter space for temperature, stress, and time, and to predict the corresponding filling ratio. Furthermore, the optimal combination of imprinting process parameters was identified, and its filling ratio was experimentally validated to reach as high as 0.94. The near-perfect replication of microstructures confirms the superiority of the active force modulation system and the data-driven strategy of machine learning-assisted parameter design. At the same time, this one-step microforming process provides a new approach to addressing the accuracy-cost trade-off dilemma in precision manufacturing.

关键词： metallic glass amorphous alloy microforming imprinting machine learning

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Effect of Bi/Si Ratio of BiBSi Glass on Its Structure,Properties and Laser Sealing Shear Strength for Vacuum Glazing

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Journal of Wuhan University of Technology(materials Science) 2025年第1期 13-24页

作者：刘伟 JIAO Jinxu LUO Dusha ZHOU Junjie SHI Lifen WANG Weiwei LI Changqing WANG Peng XIONG Dehua 李宏 State key laboratory of Silicate materials for Architectures Wuhan University of Technology Silica-based materials laboratory of Anhui Province CNBM Research Institute for Advanced Glass Materials Group Co. Ltd State key laboratory of advanced Technology for Float Glass CNBM Research Institute for Advanced Glass Materials Group Co. Ltd

The low-melting glass of Bi2O3-B2O3-SiO2（BiBSi） system was used for the first time for laser sealing of vacuum *** the condition of constant boron content,how the structure and properties vary with Bi/Si ratio in low-melting glass was *** addition,the relationships between laser power,low-melting glass solder with different Bi/Si ratios and laser sealing shear strength were *** results show that a decrease in the Bi/Si ratio can cause a contraction of the glass network of the low-melting glass,leading to an increase of its characteristic temperature and a decrease of its coefficient of thermal *** laser sealing,the copper ions in the low-melting glass play an endothermic role.A change in the Bi/Si ratio will affect the valence state transition of the copper ions in the low-melting *** absorbance of the low-melting glass does not follow the expected correlation with the Bi/Si ratio,but shows a linear correlation with the content of divalent copper *** greater the concentration of divalent copper ions,the greater the absorbance of the low-melting glass,and the lower the laser power required for laser *** shear strength of the low melting glass solder after laser sealing was tested,and it was found that the maximum shear strength of Z1 glass sample was the highest up to 2.67 MPa.

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Microstructure,Texture Evolution,and Mechanical Properties of ECAP-Processed ZAT522 magnesium Alloy

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Acta Metallurgica Sinica(English Letters) 2020年第2期33卷 233-242页

作者： Ying Ma Fu-Yin Han Cheng Liu Ming-Zhe Li School of materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China shanxi key laboratory of advanced magnesium-based materials Taiyuan University of TechnologyTaiyuan 030024China

In this work,the high-strength Mg-5Zn-2Al-2Sn(ZAT522,in wt%) Mg alloys was obtained at 220℃ and 130℃ by a two-step equal channel angular pressing(ECAP).For each stage,two passes were *** results showed a remarkable grain refinement after the first stage of ECAP(A2 samples),leading to a fine-grained structure with average size of 1.40 μ*** additional stage(A4 samples) caused further grain refinement to 1.18 μm,and an ultra-fine grain structure(700 nm)appeared in the precipitate-rich *** grain refinement mechanism for both samples was discussed in *** this end,the original extrusion fiber texture evolved into a new strong texture characterized by the base planes tilted toward the ECAP shear plane,with a higher Schmid factor value of *** with the as-extruded alloy,the yield strength of the A2 samples increased from 180 to 245 MPa,which was mainly attributed to the combined effects of grain boundary strengthening and precipitation *** the case of A4 samples,the dislocation strengthening resulted in a net increase in yield strength to 335 MPa,while the ductility was significantly reduced.

关键词： Mg–5Zn–2Al–2Sn Mg alloy ECAP Microstructure Texture Tension properties

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Effects of rolling deformation on microstructure and hardness of Ti-45Al-9Nb-0.3Y alloy

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Journal of Rare Earths 2016年第2期34卷 197-202页

作者：张树志张长江侯赵平孔凡涛陈玉勇 School of materials Science and Engineering Taiyuan University of Technology shanxi key laboratory of advanced magnesium-based materials Taiyuan University of Technology National key laboratory for Precision Hot Processing of Metals Harbin Institute of Technology

The microstructure evolution of as-rolled Ti-45Al-9Nb-0.3Y alloy as well as the nanohardness ofβ/B2 matrix was investigated by means of scanning electron microscopy (SEM) in backscattered electron mode (BSE) mode, transmission electron microscopy (TEM) and nanoindentation. This high Nb containing TiAl based alloy was rolled with 50%, 60%, 65% reduction, respectively. Omega phase precipitated in B2 phase with an orientation relationship of {110}β//{1120}ω and β//ω. Moreover, with the increase of de-formation reduction, rod-like structure which was formed inγ grain transformed from (α2+γ) lamellae structure intoα2 phase only. Addi-tionally, nanoinentation experiment revealed that the precipitation hardening ofω phase increased the hardness ofβ/B2 phase.

关键词： high Nb containing TiAl based alloy TNB alloy hot rolling omega phase phase transformation nanohardness rare earths

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Effect of extrusion on the microstructure and mechanical properties of a low-alloyed Mg-2Zn-0.8Sr-0.2Ca matrix composite reinforced by TiC nano-particles

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International Journal of Minerals,Metallurgy and materials 2022年第11期29卷 1981-1990页

作者： Zedong Wang Kaibo Nie Kunkun Deng Jungang Han College of materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China shanxi key laboratory of advanced magnesium-based materials Taiyuan University of TechnologyTaiyuan 030024China

A low-alloyed Mg-2Zn-0.8Sr-0.2Ca matrix composite reinforced by TiC nano-particles was successfully prepared by semi-solid stirring under the assistance of ultrasonic,and then the as-cast composite was hot *** results indicated that the volume fraction of dynamical recrystallization and the recrystallized grain size have a certain decline at lower extrusion temperature or *** finest grain size of~0.30μm is obtained in the sample extruded at 200℃ and 0.1 mm/*** as-extruded sample displays a strong basal texture intensity,and the basal texture intensity increases to 5.937 mud while the extrusion temperature increases from 200 to 240℃.The ultra-high mechanical properties(ultimate tensile strength of 480.2 MPa,yield strength of 462 MPa)are obtained after extrusion at 200℃ with a rate of 0.1 mm/*** all strengthening mechanisms for the present composite,the grain refinement contributes the most to the increase in strength.A mixture of cleavage facets and dimples were observed in the fracture surfaces of three as-extruded nanocomposites,which explain a mix of brittle-ductile fracture way of the samples.

关键词： magnesium matrix composite extrusion microstructure and mechanical properties texture fracture

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Tailoring the microstructural characteristic and improving the corrosion resistance of extruded dilute Mg-0.5Bi-0.5Sn alloy by microalloying with Mn

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Journal of magnesium and Alloys 2021年第5期9卷 1673-1685页

作者： Yang Liu Wei-li Cheng Xiong-jie Gu Yan-hui Liu Zeqin Cui Lifei Wang Hong-xia Wang School of materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China shanxi key laboratory of advanced magnesium-based materials Taiyuan University of TechnologyTaiyuan 030024China

Mg-0.5Bi-0.5Sn alloys with and without microalloying with 0.5 wt%Mn were subjected to extrusion,and the effect of Mn microalloying on the microstructural characteristic and corrosion behavior of the extruded alloys was *** results indicated that the average grain size and the density of dislocations decreased,and a new Mg_(26.67)Mn_(65.47)Fe_(7.86)second phase as well as grain boundary segregation of Sn atoms could be observed in certain micro-regions of the extruded dilute Mg-0.5Bi-0.5Sn-0.5 Mn *** tailoring of microstructure resulted in the significant enhancement in corrosion resistance(R_(p)increased from 1095.91Ωcm^(2)to 5008.79Ωcm^(2)).In addition,grain boundary segregation resulted in intergranular corrosion and led to the dissolution of Sn ***,the dissolution rate of the matrix in Mg-0.5Bi-0.5Sn-0.5Mn alloy could be inhibited by the corrosion product film containing an intermediate product(SnO_(2)).

关键词： Mg alloy Extrusion Microalloying Microstructure Corrosion behavior

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Effect of Post-weld Heat Treatment on Mechanical Characteristics of AZ31 magnesium Alloy Welded Joints

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Journal of Wuhan University of Technology(materials Science) 2017年第5期32卷 1205-1212页

作者：闫志峰张红霞 DUAN Jinwen LIU Fei WANG Guilei College of materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 China shanxi key laboratory of advanced magnesium-based materials Taiyuan 030024 China

Tungsten inert gas（TIG） welding was performed on 2.7 mm thick commercial extruded AZ31 B magnesium alloy plates. We investigated the effect of post-weld heat treatment（PWHT） on the microstructure, mechanical properties and precipitated phase of the weld joints. The results showed that during the annealing treatment（200 ℃-1 h, 250 ℃-1 h, 300 ℃-1 h, 350 ℃-1 h, 400 ℃-1 h, and 450 ℃-1 h）, the average grain size in the weld seam was the minimum after annealing at 400 ℃ for 1 hour, and then abnormally grew up after annealing at 450 ℃ for 1 hour. The mechanical properties enhanced when the joints were processed from 200 ℃-1 h to 400 ℃-1 h but sharply decreased with increasing annealing temperature. In contrast to the annealing treatment, solution treatment（250 ℃-10 h, 300 ℃-10 h, 350 ℃-10 h, 400 ℃-10 h, and 450 ℃-10 h） exhibited a better ductility but a slight deterioration in tensile strength. Especially speaking, no eutectic compounds（such as Mg17 Al12） were observed in the weld seam. The supersaturated Al atoms were precipitated in a coarse spherical shape dispersed in the weld seam. The precipitated Al atoms dissolved in the matrix substances at the condition（400 ℃-1 h） or（250 ℃-10 h）. The solution treatment caused grain coarsening and precipitated Al atoms dissolved in the weld seam substantially, which resulted in a drop in micro-hardness at the weld seam compared to the area of the annealed joints.

关键词： magnesium alloy welded joint heat treatments microstructure mechanical properties

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Microstructure evolution and mechanical properties of Mg-9Al-1Si-1SiC composites processed by multi-pass equal-channel angular pressing at various temperatures

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International Journal of Minerals,Metallurgy and materials 2021年第12期28卷 1966-1975页

作者： Xiang-peng Zhang Hong-xia Wang Li-ping Bian Shao-xiong Zhang Yong-peng Zhuang Wei-li Cheng Wei Liang shanxi key laboratory of advanced magnesium based materials College of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024China key laboratory of Interface Science and Engineering in advanced materials Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China

In this study,Mg-9 Al-1 Si-1 SiC(wt%)composites were processed by multi-pass equal-channel angular pressing(ECAP)at various temperatures,and their microstructure evolution and strengthening mechanism were *** showed that the as-cast microstructure was composed of anα-Mg matrix,discontinuous Mg17Al12 phase,and Chinese script-shaped Mg2Si *** solution treatment,almost all of the Mg17Al12 phases were dissolved into the matrix,whereas the Mg2Si phases were *** subsequent multi-pass ECAP at different temperatures promoted the dynamic recrystallization and uniform distribution of the Mg17Al12 precipitates when compared with the multipass ECAP at a constant temperature.A large number of precipitates can effectively improve the nucleation ratio of recrystallization through a particle-stimulated nucleation *** addition,the SiC nanoparticles were mainly distributed at grain boundaries,which effectively prevented dislocation *** excellent comprehensive mechanical properties can be attributed to grain boundary strengthening and Orowan strengthening.

关键词： strengthening recrystallization microstructure

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