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Enhanced rate capability and cycle stability of Ti2C MXene for sodium storage through an aniline molecules welding strategy

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Tungsten 2025年第1期7卷 161-171页

作者： Hao Chen Ya-Qin Wang dong-Ting Zhang Bei Zhao min-peng Li Chen-Yang Li Tian-peng Xu Mao-Cheng Liu State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals Lanzhou University of Technology School of Materials Science and Engineering Lanzhou University of Technology School of Computer and Communication Technology Lanzhou University of Technology

MXenes obtained significant attention in the field of energy storage devices due to their characteristic layered structure,modifiable surface functional groups,large electrochemically active surface,and regulable interlayer ***,the self-restacking and sluggish ions diffusion kinetics performance of MXenes during the alkali metal ions insertion/extraction process severely impedes their cycle stability and rate *** paper proposes an aniline molecule welding strategy for welding p-phenylenediamine（PPDA） into the interlayers of Ti2C through a dehydration condensation *** welded PPDA molecules can contribute pillar effect to the layered structure of *** pillar effect effectively maintains the structural stability during the sodium ions insertion/extraction process and effectively expands the interlayer spacing of Ti2C from 1.16 to 1.38 nm,thereby enhancing ions diffusion kinetics performance and improving the long-term cycle *** Ti2C-PPDA demonstrates outstanding Na+storage capability,exhibiting a specific capacity of 100.2 mAh·g-1at a current density of 0.1 A·g-1over 960 cycles and delivering a remarkable rate capability 81.2 mAh·g-1at a current density of 5 A·*** study demonstrates that expanding interlayer spacing is a promising strategy to enhance the Na+storage capacity and improve long-term cycling stability,which provides significant guidance for the design of two-dimensional Na+storage materials with high-rate capability and cycle stability.

关键词： Diffusion kinetics Expanding interlayer spacing Rate capability Sodium ions storage Ti2C

Reveal short range interactions between u/d quarks in the NN,D_(03),and D_(30)systems

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Science China(Physics,Mechanics & Astronomy) 2025年第3期68卷 102-111页

作者： Qi-Fang Lü Yu-Bing dong peng-Nian Shen Zong-Ye Zhang Department of Physics Hunan Normal UniversityChangsha410081China Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of ministry of Education Changsha410081China Key Laboratory for Matter Microstructure and Function of Hunan Province Hunan Normal UniversityChangsha410081China Institute of High Energy Physics Chinese Academy of SciencesBeijing100049China School of Physical Sciences University of Chinese Academy of SciencesBeijing101408China

The dynamic mechanism of short range interactions between u/d quarks remains an open and challenging *** order to reveal this quark dynamics,we perform a systematic analysis of N N,D_(03),and D_(30)systems in the(extended)chiral SU(3)constituent quark *** comparing results calculated with different models and different parameter sets,the effects of one gluon exchange and vector meson exchange terms are carefully *** results indicate that the vector meson exchange interactions dominate the short range interactions between u/d quarks,whereas the small residual one gluon exchange coupling strength is also allowed.

关键词： short range interactions dibaryons constituent quark models

CaH2-promoted activity of Ni-carbonate interface for CO_(2) methanation

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Journal of Energy Chemistry 2025年第1期100卷 522-532页

作者： Jin-peng Wang Guo-Cui Mao Hui-Lin Jiang Bao-Xia dong Yun-Lei Teng School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002JiangsuChina

Transition metal-carbonate interfaces often act as active sites in heterogeneous catalytic *** interface between transition metal and metal carbonate exhibits a dynamic equilibrium during the CO_(2)hydrogenation reaction,involving surface carbonate hydrogenation and CO_(2)***,there have been few reports on engineering the activity of the interface between transition metal and alkaline earth metal carbonate for catalytic CO_(2)*** work demonstrated that the incorporation of CaH_(2)in Ni/CaCO_(3)enhances the CO_(2)methanation activity of the *** CO_(2)conversion for Ni/CaH_(2)-CaCO_(3)reached 68.5%at 400°C,which was much higher than that of the Ni/CaCO_(3)(31.6%) and Ni/CaH_(2)-CaO (42.4%) ***,the Ni/CaH_(2)-CaCO_(3)catalysts remained stable during the stability test for 24 h at 400°C and 8 *** research revealed that CaH_(2)played a crucial role in promoting the activity of the Ni-carbonate interface for CO_(2)***_(2)could modify the electronic structure of Ni and tune the structural properties of CaCO_(3)to generate medium basic sites (OH groups),which are favorable for the activation of H2and CO_(2).In-situ Fourier transform infrared spectroscopy (FTIR) analysis combined with density functional theory calculations demonstrated that CO_(2)activation occurs at the hydroxyl group (OH) on the CaH_(2)-modified Ni-carbonate surface,leading to the formation of CO_(3)H****,our study has confirmed that CO_(2)methanation over the Ni/CaH_(2)-CaCO_(3)catalysts proceeds via the formate pathway.

关键词： CO_(2)methanation Metal hydride Ni catalysts Carbonate Metal-carbonate interface

Rapid detection of colored and colorless macroand micro-plastics in complex environment via near-infrared spectroscopy and machine learning

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Journal of Environmental Sciences 2025年第1期147卷 512-522页

作者： Hui-Huang Zou Pin-Jing He Wei peng dong-Ying Lan Hao-Yang Xian Fan Lü Hua Zhang Institute of Waste Treatment&Reclamation College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

To better understand the migration behavior of plastic fragments in the environment,development of rapid non-destructive methods for in-situ identification and characterization of plastic fragments is ***,most of the studies had focused only on colored plastic fragments,ignoring colorless plastic fragments and the effects of different environmental media(backgrounds),thus underestimating their *** address this issue,the present study used near-infrared spectroscopy to compare the identification of colored and colorless plastic fragments based on partial least squares-discriminant analysis(PLS-DA),extreme gradient boost,support vector machine and random forest *** effects of polymer color,type,thickness,and background on the plastic fragments classification were ***-DA presented the best and most stable outcome,with higher robustness and lower misclassification *** models frequently misinterpreted colorless plastic fragments and its background when the fragment thickness was less than 0.1mm.A two-stage modeling method,which first distinguishes the plastic types and then identifies colorless plastic fragments that had been misclassified as background,was *** method presented an accuracy higher than 99%in different *** summary,this study developed a novel method for rapid and synchronous identification of colored and colorless plastic fragments under complex environmental backgrounds.

关键词： Colorless microplastics Near-infrared hyperspectral imaging Plastic identification Partial least squares discriminant analysis Machine learning

BmATAD3A mediates mitochondrial ribosomal protein expression to maintain the mitochondrial energy metabolism of the silkworm,Bombyx mori

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Insect Science 2025年第1期32卷 193-208页

作者： Zhanqi dong Nachuan Liao Yan Luo Ya Zhang Liang Huang peng Chen Cheng Lu minhui Pan State Key Laboratory of Resource Insects Southwest UniversityChongqingChina Key Laboratory of Sericultural Biology and Genetic Breeding Ministry of Agriculture and Rural AffairsSouthwest UniversityChongqingChina

ATAD3A is a mitochondrial membrane protein belonging to the ATPase family that contains the AAA+*** is widely involved in mitochondrial metabolism,protein transport,cell growth,development and other important life *** has previously been reported that the deletion of ATAD3A causes growth and development defects in humans,mice and Caenorhabditis *** delve into the mechanism underlying ATAD3A defects and their impact on development,we constructed a Bombyx mori ATAD3A(BmATAD3A)defect model in silkworm *** aim to offer a reference for understanding ATAD3A genetic defects and elucidating the molecular regulatory *** results showed that knockout of the BmATAD3A gene significantly affected the weight,survival rate,ATPase production and mitochondrial metabolism of individuals after 24 h of *** metabolomics and transcriptomics analysis further demonstrated that BmATAD3A knockout inhibits amino acid biosynthesis through the regulation of mitochondrial ribosomal protein ***,our findings indicate that BmATAD3A knockout impeded mitochondrial activity and ATPase synthesis and suppressed the mitochondrial oxidative phosphorylation pathway through *** mitochondrial ribosomal protein L11(BmmRpL11).These results provide novel insights into the molecular mechanisms involved in the inhibition of development caused by ATAD3A deficiency,offering a potential direction for targeted therapy in diseases associated with abnormal ATAD3A expression.

关键词： ATAD3A ATPase BmmRpL1l Bombyx mori mitochondrial ribosomal protein

Cross-section design of the flow channels in membrane electrode assembly electrolyzer for CO_(2) reduction reaction through numerical simulations

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Chinese Chemical Letters 2025年第1期36卷 332-337页

作者： Lili Zhang Hui Gao Gong Zhang Yuning dong Kai Huang Zifan Pang Tuo Wang Chunlei Pei peng Zhang Jinlong Gong Key Laboratory for Green Chemical Technology of ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin 300072China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China National Industry-Education Platform of Energy Storage Tianjin UniversityTianjin 300350China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207China

Membrane electrode assembly(MEA)is widely considered to be the most promising type of electrolyzer for the practical application of electrochemical CO_(2) reduction reaction(CO_(2)RR).In MEAs,a square-shaped cross-section in the flow channel is normally adopted,the configuration optimization of which could potentially enhance the performance of the *** paper describes the numerical simulation study on the impact of the flow-channel cross-section shapes in the MEA electrolyzer for CO_(2)*** results show that wide flow channels with low heights are beneficial to the CO_(2)RR by providing a uniform flow field of CO_(2),especially at high current ***,the larger the electrolyzer,the more significant the effect *** study provides a theoretical basis for the design of high-performance MEA electrolyzers for CO_(2)RR.

关键词： Electrochemical reduction of CO_(2) Membrane electrode assembly Mass transfer Gas diffusion electrode Computational fluid dynamics

Ultrafast sodium storage of alkylamine molecule tailored MnPS_(3) enabled by quasi-topological intercalation mechanism

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Science China Chemistry 2025年第2期68卷 552-560页

作者： Xueyang Tu Ke Fan Baixin peng Zhuoran Lv Yiran Hao Wujie dong Wei Zhao Zuocheng Wang Haitao Huang Yuqiang Fang Fuqiang Huang State Key Lab of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Zhangjiang Institute for Advanced Study Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of High-Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHong Kong 999077China Jiangxi Far East Battery Co. Ltd.Yichun 330600China

Two-dimensional transition metal trithiophosphates(TMPS_(3),TM=Mn,Fe,Co,etc.)are competitive anode materials for sodium-ion batteries(SIBs)due to their high theoretical capacity(>1,300 mAh g^(−1))but suffer from limited practical capacity(~300 mAh g^(−1))and inferior rate capability caused by sluggish Na+intercalation/deintercalation kinetics and severe structural ***,alkylamine molecules are first proposed as intercalation guests to significantly boost the electrochemical activity and stability of MnPS_(3).Compared to MnPS_(3),C3H9N-MnPS_(3) enlarges the interlayer spacing from 6.48 to 10.23Åand shows a 105 times higher electrical conductivity,which provides fast ion/electron transport and high strain adaptability,realizing a quasi-topological Na+intercalation ***,C3H9N-MnPS_(3) exhibits an ultrahigh reversible capacity of 775 mAh g^(−1) at 0.5 A g^(−1) and superior high-rate cycling stability with~100%capacity retention after 2,500 cycles at 15 A g^(−1),ranking it among the top metal trithiophosphate-based anode materials *** calculations indicate that the improved sodium storage performance of C3H9N-MnPS_(3) results from the reduced bonding energy of P–S bonds and increased adsorption energy of Na^(+).This work is expected to provide an efficient strategy for the design of high-performance layered anode materials for SIBs.

关键词： transition metal trithiophosphates intercalation guest sodium-ion batteries quasi-topological intercalation

Processing,microstructure,and mechanical properties of wire arc additively-manufactured AZ91 magnesium alloy using cold arc process

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Transactions of Nonferrous Metals Society of China 2025年第1期35卷 91-104页

作者： Bai-hao CAI Ji-kang FAN Jie LI dong-qing YANG Yong peng Ke-hong WANG Key Laboratory of Controlled Arc Intelligent Additive Technology Ministry of Industry and Information TechnologyNanjing University of Science and TechnologyNanjing 210094China School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China

Thin walls of an AZ91 magnesium alloy with fine equiaxed grains were fabricated via cold arc-based wire arc additive manufacturing(CA-WAAM),and the droplet transfer behaviours,microstructures,and mechanical properties were *** results showed that the cold arc process reduced splashing at the moment of liquid bridge breakage and effectively shortened the droplet transfer *** microstructures of the deposited samples exhibited layered characteristics with alternating distributions of coarse and fine *** layer-by-layer deposition,the β-phase precipitated and grew preferentially along grain boundaries,while the fineη-Al_(8)Mn_(5)phase was dispersed in the α-Mg *** mechanical properties of the CA-WAAM deposited sample showed isotropic *** ultimate tensile strength and elongation in the building direction(BD)were 282.7 MPa and 14.2%,*** microhardness values of the deposited parts were relatively uniform,with an average value of HV 69.6.

关键词： AZ91 magnesium alloy droplet transfer microstructure mechanical properties cold arc process

Applicability of Different Indices for Delineating the Boundary of Arid Region:A Case Study in Northwestern China

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Journal of Earth Science 2025年第1期36卷 212-222页

作者： Xue peng Xiang Li Yingyibing Shen Xuehua Che Shipei dong Zhuolun Li Key Laboratory of Western China's Environmental Systems(ministry of Education) College of Earth and Environmental SciencesCenter for Glacier and Desert ResearchLanzhou UniversityLanzhou 730030China

Arid regions are vital components of Earth’s land *** the area/boundary of arid region is crucial for comprehending area changes and potential ***,the accuracy and applicability of arid region boundary delineated by different indices remain *** this study,the annual precipitation(AP),humidity index(H),and aridity index(K)were calculated for delineating arid region of China using 106 meteorological stations during 1990–*** results suggest that AP and H can accurately delineate arid region,because they are consistent with the distribution of typical soil and vegetation in arid region,whereas K is ***,AP is the best index for delineating arid region in regions with limited meteorological data,especially in studying long-term patterns and mechanisms of area *** accuracy of delineating arid region using H is enhanced in regions with abundant meteorological *** the past 30 years,influenced by the increase of atmospheric moisture influx and precipitation,the area in arid region of northwestern China decreased by 70×10^(3)–90×10^(3)km^(2),resulting in the present area of approximately 1.55×10^(6)km^(2).This study provides appropriate indices for delineating arid region,contributing to improving our knowledge of regional responses difference to climate change.

关键词： climate regionalization arid region climate change northwestern China Earth Science