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Science China Chemistry 2020年第4期63卷 513-518页

作者： Junyu Zhang Gen Li hong-gang liao Shi-gang Sun State Key Lab of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy MaterialsCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Using the in-situ liquid cell transmission electron microscopy, the three-stage growth of Pt3Ni-Ni(OH)2 core-shell structures at the gas-liquid interfaces was clearly observed, which consists of(1) a thermodynamically driven Pt3Ni alloy core by the monomer attachment,(2) a nickel(Ni) shell formation due to the depletion of the Pt salt precursor, and(3) the oxidation and of the Ni shell into Ni(OH)2 flakes. We also further observed the nucleation and growth of the Ni(OH)2 flakes on an existing layer either at the middle part or at the step edge. More interestingly, the dynamic transformation among a Pt3Ni alloy, Ni clusters and Ni(OH)2 flakes was also imaged even at a high electron dose rate.

关键词： Pt3Ni-Ni(OH)2 core-shell structure liquid cell electron microscopy gas-liquid interface dynamic transformation

CeO_(x)-supported monodispersed MoO_(3) clusters for high-efficiency electrochemical nitrogen reduction under ambient condition

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Journal of Energy Chemistry 2021年第5期30卷 186-192页

作者： Jie Liu Guanghua Wang Shiyuan Zhou Sangui Liu Gen Li hong-gang liao Shi-gang Sun State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina

Developing efficient and low-cost electrocatalysts is essential for the electroreduction of N_(2) to NH_(3).Here,highly monodispersed MoO_(3) clusters loaded on a coral-like CeO_(x)compound with abundant oxygen vacancies are successfully prepared by an impregnation-reduction *** MoO_(3) clusters with small sizes of 2.6±0.5 nm are induced and anchored by the oxygen vacancies of CeO_(x),resulting in excellent nitrogen reduction reaction(NRR)***,the synergistic effects between MoO_(3) and CeO_(x)lead to a further improvement of the electrochemical *** as-prepared MoO_(3)-CeO_(x)catalyst shows an NH_(3) yield rate of 32.2 μg h^(-1) mg^(-1) cat and a faradaic efficiency of 7.04%at-0.75 V(*** hydrogen electrode)in 0.01 M Dulbecco’s Phosphate Buffered ***,it displays decent electrochemical stability over 30,000 ***,the electrochemical NRR mechanism for MoO_(3)-CeO_(x)is investigated by in-situ Fourier transform infrared spectroscopy.N-H stretching,H-N-H bending,and N-N stretching are detected during the reaction,suggesting that an associative pathway is *** work provides an approach to designing and synthesizing potential electrocatalysts for NRR.

关键词： Electrochemical nitrogen reduction reaction Mo-based catalysts Monodispersed clusters Oxygen vacancies

Spontaneous local redox reaction to passivate CNTs as lightweight current collector for high energy density lithium ion batteries

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Journal of Energy Chemistry 2023年第5期80卷 553-561,I0013页

作者： Chao Lv Zhen Tong Shi-Yuan Zhou Si-Yu Pan hong-gang liao Yao Zhou Jun-Tao Li College of Energy Xiamen UniversityXiamen 361005FujianChina State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina

Extensive usage of highly conductive carbon materials with large specific surface area(e.g.,carbon nanotubes,CNTs)in lithium ion batteries(LIBs),especially as current collector of anodes,suffers from low initial coulombic efficiency(ICE),large interfacial resistance,and severe embrittlement,as the large specific surface area often results in severe interfacial decomposition of the electrolyte and the formation of thick and fluffy solid electrolyte interphase(SEI)during cycling of ***,we demonstrate that when the CNT-based current collector and Na foil(which are being stacked intimately upon each other)are being placed in Na+-based organic electrolyte,local redox reaction between the Na foil and the electrolyte would occur spontaneously,generating a thin and homogeneous NaF-based passivating layer on the *** importantly,we found that owing to the weak solvation behaviors of Na+in the organic electrolyte,the resulting passivation layer,which is rich in NaF,is thin and dense;when used as the anode current collector in LIBs,the pre-existing passivating layer can function effectively in isolating the anode from the solvated Li+,thus suppressing the formation of bulky SEI and the destructive intercalation of solvated Li+.The relevant half-cell(graphite as anode)exhibits a high ICE of 92.1%;the relevant pouch cell with thus passivated CNT film as current collectors for both electrodes(LiCoO_(2)as cathode,graphite as anode)displays a high energy density of 255 Wh kg^(-1),spelling an increase of 50%compared with that using the conventional metal current collectors.

关键词： Lightweight current collector Passivating layer Initial coulombic efficiency High energy density storage

Visualizing light-induced dynamic structural transformations of Au clusters-based photocatalyst via in situ TEM

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Nano Research 2021年第8期14卷 2805-2809页

作者： Bo Weng Youhong Jiang hong-gang liao Maarten B.J.Roeffaers Feili Lai Haowei Huang Zichao Tang State Key Laboratory for Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy MaterialsCollege of Chemistry and Chemical Engineering Xiamen UniversityXiamen 361005China cMACS Department of Microbial and Molecular SystemsKU LeuvenCelestijnenlaan 200F3001 LeuvenBelgium Department of Chemistry KU LeuvenCelestijnenlaan 200F3001 LeuvenBelgium

Ultrasmall gold(Au)clusters have been regarded as one of the prototypes materials for solar energy conversion due to their unique strong molecular-like light absorption ***,the light-induced aggregation of Au clusters into nanoparticles is one of the most important factors that restricts its application in *** Au clusters aggregation has been widely demonstrated,the underlying mechanism for cluster fusion is still unclear due to the lack of experimental ***,we report the direct observation of Au clusters on TiO_(2) nanosheets aggregating when used as visible light photocatalysts for the reduction of *** in situ high-resolution transmission electron microscopy(TEM),the coexistence of two fusion mechanisms of Au clusters on TiO_(2) under ultraviolet-visible(UV-Vis)light irradiation in air is identified,i.e.,the migration and coalescence(MC)and Ostwald ripening(OR).Additionally,the correlation between the photostability of Au clusters and reaction atmospheres has been investigated,among which Au clusters have higher stability in an inert N_(2) atmosphere or vacuum than the oxidizing atmospheres(i.e.,air and O_(2)).These results indicate the inherent stability of Au cluster during photocatalysis,and instability comes from the consuming of ligand *** work not only discloses the underlying mechanism of Au cluster sintering but also provides guidelines for enhancing metal clusters-based photocatalysts stability.

关键词： photocatalysis dynamic structural transformation Au clusters in situ TEM

In-situ liquid cell TEM investigation on assembly and symmetry transformation of Pt superlattice

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Science China Materials 2020年第4期63卷 602-610页

作者： Junyu Zhang Shi-gang Sun hong-gang liao State Key Lab of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy MaterialsCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Two dimensional(2D)nanocrystal functional superlattices with a well controlled structure are of significant importance in photonic,plasmonic and optoelectronic applications and have been well studied,but it remains challenging to understand the formation mechanism and development pathway of the *** this study,we employed in-situ liquid cell transmission electron microscopy to study the formation of 2D superlattice and its local phase transition from hexagonal-to-square nanocrystal *** colloidal nanocrystals flowed in the solution,long-range ordered hexagonal superlattice could be formed either through shrinking and rearrangement of nanocrystal aggregates or via nanocrystal *** the nanocrystals’shape transformed from truncated octahedral to cube,the local superlattice rearranged to square ***,our observations and quantitative analyses reveal that the phase transition from hexagonal to square mainly originates from the strong van der Waals interactions between the vertical(100)*** tracking of 2D cube superlattice formation in real-time could provide unique insights on the governing force of superlattice assembling and stabilization.

关键词： shape transform hexagonal-to-square van der Waals interactions liquid cell transmission electron microscopy

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“电化学前沿”专辑序言

电化学 2022年第2期28卷 1-3页

作者：廖洪钢彭章泉蔡文斌厦门大学化学化工学院福建厦门361005 中国科学院大连化学物理研究所辽宁大连116023 复旦大学化学系能源材料化学协同创新中心上海市分子催化与功能材料表面重点实验室上海200433

电化学是一门历史悠久但充满活力的学科,自1791年Galvani发现动物电现象,电化学经历了多次蓬勃发展与变革拓展。电化学是研究与电有关的物质转化和能量转化及其规律的学科,是横跨自然科学(理学)和应用科学(工程、技术)两大领域的重要学... 详细信息

电化学是一门历史悠久但充满活力的学科,自1791年Galvani发现动物电现象,电化学经历了多次蓬勃发展与变革拓展。电化学是研究与电有关的物质转化和能量转化及其规律的学科,是横跨自然科学(理学)和应用科学(工程、技术)两大领域的重要学科。传统观念认为电化学主要研究电能和化学能之间的相互转换,如电解和电池。但电化学并不局限于与电能相关的化学反应,也包含其它物理化学过程,如电化学生物传感、光电化学、金属电镀与腐蚀等。随着时代进步,各种新兴技术如光谱、质谱、显微、计算模拟等也被应用于电化学体系和过程研究。

关键词：电化学生物传感物理化学过程金属电镀物质转化光电化学能量转化计算模拟新兴技术

Fatigue Strength Analysis of Dissimilar Aluminum Alloy TIG Welds

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 265-274页

作者： liao Xiangyun WANG Ruijie LIU Guoshou ZHAO Pinglin Faculty of Mechanical and Electrical Engineering Kunming University of Science and TechnologyKunming 650500China Faculty of Civil Engineering and Mechanics Kunming University of Science and TechnologyKunming 650500China

The constant amplitude loading fatigue tests were carried out on the 6061/7075 aluminum alloy TIG fillet welded lap specimens in this study,and the weld seam cross-section hardness was *** experimental results show that most specimens mainly failed at the 7075 side weld toes even though the base material tensile strength of 7075 is higher than that of *** maximum stress-strain concentration in the two finite element models is located at the 7075 side weld toe,which is basically consistent with the actual fracture *** weld zone on the 7075 side experiences severe material softening,with a large ***,the Vickers hardness value on the 6061 side negligibly changes and fluctuates around 70 *** obvious defects are found on the fatigue fracture,but a large number of secondary cracks *** germinate from the weld toe and propagate in the direction of the plate *** reinforcement has a serious impact on fatigue *** life will decrease exponentially as the weld reinforcement increases under low *** is found that the notch stress method can give a better fatigue life prediction for TIG weldments,and the errors of the predicted results are within the range of two factors,while the prediction accuracy decreases under low *** equivalent structural stress method can also be used for fatigue life prediction of TIG weldments,but the errors of prediction results are within the range of three factors,and the accuracy decreases under high stress.

关键词： TIG welding notch stress method equivalent structural stress method fatigue life finite element analysis

Enhancing Deepfake Detection:Proactive Forensics Techniques Using Digital Watermarking

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Computers, Materials & Continua 2025年第1期82卷 73-102页

作者： Zhimao Lai Saad Arif Cong Feng Guangjun liao Chuntao Wang School of Automation Guangdong University and TechnologyGuangzhou510006China School of Immigration Administration(Guangzhou) China People’s Police UniversityGuangzhou510663China Department of Mechanical Engineering College of EngineeringKing Faisal UniversityAl Ahsa31982Saudi Arabia Cyber Police Division Guangzhou Public Security BureauGuangzhou510030China School of Forensic Science and Technology Guangdong Police CollegeGuangzhou510320China College of Mathematics and Informatics South China Agricultural UniversityGuangzhou510642China

With the rapid advancement of visual generative models such as Generative Adversarial Networks(GANs)and stable Diffusion,the creation of highly realistic Deepfake through automated forgery has significantly *** paper examines the advancements inDeepfake detection and defense technologies,emphasizing the shift from passive detection methods to proactive digital watermarking *** detection methods,which involve extracting features from images or videos to identify forgeries,encounter challenges such as poor performance against unknown manipulation techniques and susceptibility to counter-forensic *** contrast,proactive digital watermarking techniques embed specificmarkers into images or videos,facilitating real-time detection and traceability,thereby providing a preemptive defense againstDeepfake *** offer a comprehensive analysis of digitalwatermarking-based forensic techniques,discussing their advantages over passivemethods and highlighting four key benefits:real-time detection,embedded defense,resistance to tampering,and provision of legal ***,the paper identifies gaps in the literature concerning proactive forensic techniques and suggests future research directions,including cross-domain watermarking and adaptive watermarking *** systematically classifying and comparing existing techniques,this review aims to contribute valuable insights for the development of more effective proactive defense strategies in Deepfake forensics.

关键词： Deepfake proactive forensics digital watermarking traceability detection techniques

High-temperature-tolerant flexible supercapacitors: Gel polymer electrolytes and electrode materials

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Journal of Energy Chemistry 2025年第1期100卷 426-457页

作者： Chong Peng Xinyi Huang Mingwei Zhao Shuling liao Quanhong Yang Nianjun Yang Siyu Yu School of Chemistry & Chemical Engineering Southwest University Nanoyang Group Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy Storage School of Chemical Engineering and Technology and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin University Department of Chemistry & IMO-IMOMEC Hasselt University

The development of flexible supercapacitors(FSCs) capable of operating at high temperatures is crucial for expanding the application areas and operating conditions of supercapacitors. Gel polymer electrolytes and electrode materials stand as two key components that significantly impact the efficacy of hightemperature-tolerant FSCs(HT-FSCs). They should not only exhibit high electrochemical performance and excellent flexibility, but also withstand intense thermal stress. Considerable efforts have been devoted to enhancing their thermal stability while maintaining high electrochemical and mechanical performance. In this review, the fundamentals of HT-FSCs are outlined. A comprehensive overview of state-of-the-art progress and achievements in HT-FSCs, with a focus on thermally stable gel polymer electrolytes and electrode materials is provided. Finally, challenges and future perspectives regarding HT-FSCs are discussed, alongside strategies for elevating operational temperatures and *** review offers both theoretical foundations and practical guidelines for designing and manufacturing HT-FSCs, further promoting their widespread adoption across diverse fields.

关键词： Polymer membrane electrodes

汶川大地震后德阳地区康复医学现状分析与对策

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四川医学 2011年第10期32卷 1655-1657页

作者：唐运涛陈宏刚廖晓红张勇德阳市第二人民医院四川德阳618000

目的了解汶川大地震后德阳地区康复医学发展的现状。方法采用PPS概率抽样方法,对德阳地区医疗机构康复从业人员进行问卷调查。结果共发放调查问卷120份,回收120份,回收率100%。调查结果显示,汶川大地震后,德阳地区康复医学发展取得了一... 详细信息

目的了解汶川大地震后德阳地区康复医学发展的现状。方法采用PPS概率抽样方法,对德阳地区医疗机构康复从业人员进行问卷调查。结果共发放调查问卷120份,回收120份,回收率100%。调查结果显示,汶川大地震后,德阳地区康复医学发展取得了一定进步,但是我们也清醒地认识到,德阳地区康复医学发展深层次的矛盾和问题依然存在,尤其是康复思想观念陈旧、康复机构建设滞后、资金投入不足、人才和技术缺乏、康复教育与培训体系不完善等。结论康复医学对疾病的治愈起着积极作用,德阳地区康复医学事业亟待进一步发展提高。

关键词：地震康复现状调查