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光催化cO_(2)还原多原子催化剂的设计与制备进展

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Science china Materials 2024年第2期67卷 397-423页

作者：汪忠浩邹国军 Jong hyeok park 张侃 School of Materials Science and Engineering and School of chemistry and chemical Engineering Nanjing University of Science and TechnologyNanjing 210094China Department of chemical and Biomolecular Engineering Yonsei University50 Yonsei-roSeodaemun-guSeoul120-749Republic of Korea chemistry and chemical Engineering Guangdong Laboratory Shantou 515031China

光催化cO_(2)还原合成太阳能燃料对缓解cO_(2)排放引起的全球变暖和降低化石燃料消耗具有重要意义.然而,目前的光催化剂仍然存在反应动力学缓慢和选择性不理想的问题,特别是对于c_(2+)产物的生成,极大地限制了光催化的工业化进程.过去... 详细信息

光催化cO_(2)还原合成太阳能燃料对缓解cO_(2)排放引起的全球变暖和降低化石燃料消耗具有重要意义.然而,目前的光催化剂仍然存在反应动力学缓慢和选择性不理想的问题,特别是对于c_(2+)产物的生成,极大地限制了光催化的工业化进程.过去几十年中,关于太阳能驱动的cO_(2)还原的研究展示出鼓舞人心的结果,包括活性位点的构建.本综述重点介绍了通过构建活性位点制备原子级分散催化剂在光催化cO_(2)还原中的最新进展,包括两个独立的活性位点、成对双活性位点和基于活性位点构型的纳米团簇.此外,详细讨论了cO_(2)在活性位点上的活化机制和表征方法.特别是考虑到实验研究与实际应用之间的差距,整合实验和理论的结果,以实现潜在的结构-活性关系和高目标产物选择性发展.最后,概述了该领域存在的挑战,并展望了活性位点的合理设计和机理研究.

关键词： photocatalytic cO_(2)reduction precise engineering multiple active sites structure-activity relationships mechanistic investigation

highly Aligned Ternary Nanofiber Matrices Loaded with MXene Expedite Regeneration of Volumetric Muscle Loss

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Nano-Micro Letters 2024年第4期16卷 269-292页

作者： Moon Sung Kang Yeuni Yu Rowoon park hye Jin heo Seok hyun Lee Suck Won hong Yun hak Kim Dong‑Wook han Department of cogno‑Mechatronics Engineering College of Nanoscience and NanotechnologyPusan National UniversityBusan 46241Republic of Korea Medical Research Institute School of MedicinePusan National UniversityYangsan 50612Republic of Korea Department of Anatomy School of MedicinePusan National UniversityYangsan 50612Republic of Korea Engineering Research center for color‑Modulated Extra‑Sensory Perception Technology Pusan National UniversityBusan 46241Republic of Korea Department of Biomedical Informatics School of MedicinePusan National UniversityYangsan 50612Republic of Korea Periodontal Disease Signaling Network Research center and Dental and Life Science Institute School of DentistryPusan National UniversityYangsan 50612Republic of Korea BIO‑IT Fusion Technology Research Institute Pusan National UniversityBusan 46241Republic of Korea Present Address:Osstem Implant Inc. Seoul 07789Republic of Korea

current therapeutic approaches for volumetric muscle loss(VML)face challenges due to limited graft availability and insufficient *** overcome these limitations,tissue-engineered scaffolds have emerged as a promising *** this study,we developed aligned ternary nanofibrous matrices comprised of poly(lactide-co-ε-caprolactone)integrated with collagen and Ti_(3)c_(2)T_(x)MXene nanoparticles(NPs)(PcM matrices),and explored their myogenic potential for skeletal muscle tissue *** PcM matrices demonstrated favorable physicochemical properties,including structural uniformity,alignment,microporosity,and *** vitro assays revealed that the PcM matrices promoted cellular behaviors and myogenic differentiation of c2c12 ***,in vivo experiments demonstrated enhanced muscle remodeling and recovery in mice treated with PcM matrices following VML *** insights from next-generation sequencing revealed that MXene NPs facilitated protein and ion availability within PcM matrices,leading to elevated intracellular ca^(2+)levels in myoblasts through the activation of inducible nitric oxide synthase(i NOS)and serum/glucocorticoid regulated kinase 1(SGK1),ultimately promoting myogenic differentiation via the m TOR-AKT ***,upregulated i NOS and increased NO–contributed to myoblast proliferation and fiber fusion,thereby facilitating overall myoblast *** findings underscore the potential of MXene NPs loaded within highly aligned matrices as therapeutic agents to promote skeletal muscle tissue recovery.

关键词： Ti_(3)c_(2)T_(x)MXene nanoparticle Ternary nanofibrous matrices Myogenesis Regeneration of volumetric muscle loss Next generation sequencing

Ultra‑Efficient and cost‑Effective Platinum Nanomembrane Electrocatalyst for Sustainable hydrogen Production

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Nano-Micro Letters 2024年第6期16卷 95-110页

作者： Xiang Gao Shicheng Dai Yun Teng Qing Wang Zhibo Zhang Ziyin Yang Minhyuk park hang Wang Zhe Jia Yunjiang Wang Yong Yang Department of Mechanical Engineering College of EngineeringCity University of Hong KongTat Chee AvenueKowloon TongKowloonHong KongPeople’s Republic of China State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijingPeople’s Republic of China School of Engineering Science University of Chinese Academy of SciencesBeijingPeople’s Republic of China Laboratory for Microstructures Institute of MaterialsShanghai UniversityShanghaiPeople’s Republic of China School of Materials Science and Engineering Jiangsu Key Laboratory for Advanced Metallic MaterialsSoutheast UniversityNanjingPeople’s Republic of China Department of Materials Science and Engineering College of EngineeringCity University of Hong KongTat Chee AvenueKowloon TongKowloonHong KongPeople’s Republic of China

hydrogen production through hydrogen evolution reaction(hER)offers a promising solution to combat climate change by replacing fossil fuels with clean energy ***,the widespread adoption of efficient electrocatalysts,such as platinum(Pt),has been hindered by their high *** this study,we developed an easy-to-implement method to create ultrathin Pt nanomembranes,which catalyze hER at a cost significantly lower than commercial Pt/c and comparable to non-noble metal *** Pt nanomembranes consist of highly distorted Pt nanocrystals and exhibit a heterogeneous elastic strain field,a characteristic rarely seen in conventional *** unique feature results in significantly higher electrocatalytic efficiency than various forms of Pt electrocatalysts,including Pt/c,Pt foils,and numerous Pt singleatom or single-cluster *** research offers a promising approach to develop highly efficient and cost-effective low-dimensional electrocatalysts for sustainable hydrogen production,potentially addressing the challenges posed by the climate crisis.

关键词： Platinum hydrogen evolution reaction Lattice distortion heterogeneous strain

Recent progress of interconnecting layer for tandem organic solar cells

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Science china chemistry 2017年第4期60卷 460-471页

作者： Shunmian Lu Dan Ouyang Wallace c.h. choy Department of Electrical and Electronic Engineering The University of Hong Kong Pok Fu Lam Road Hong Kong China

This paper has reviewed:(1) the two unique advantages of tandem organic solar cells(OScs) compared to single OScs;(2) the challengings as well as strategies to develop qualified interconnecting layer(IcL) for tandem *** specifically,firstly,the two key advantages unique to tandem OScs as compared to single OScs,namely minimizing sub-bandgap transmission and thermalization loss as well as realizing optical thick and electrical thin structures,have been ***,the IcL,as one of the most challenging issue in tandem OScs that needs to fulfill the optical,electrical and mechanical requirements simultaneously to realize a qualified IcL has been *** one of the most challenging requirement among the three,the electrical requirement and its corresponding three different solving strategies have been discussed in detail,revealing a bright future for developing a general strategy to realizing qualified IcL composed of different hole transporting layer(hTL) and electron transporting layer(ETL).

关键词： tandem organic solar cell interconnecting layer

Fine-tuning electronic structure of N-doped graphitic carbon-supported co-and Fe-incorporated Mo_(2)c to achieve ultrahigh electrochemical water oxidation activity

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carbon Energy 2024年第7期6卷 134-149页

作者： Md.Selim Arif Sher Shah hyeonjung Jung Vinod K.Paidi Kug-Seung Lee Jeong Woo han Jong hyeok park Department of chemical and Biomolecular Engineering Yonsei UniversitySeoulRepublic of Korea Department of chemistry University of North BengalRaja RammohunpurDarjeelingWest BengalIndia Department of Materials Science and Engineering Research Institute of Advanced MaterialsSeoul National UniversitySeoulRepublic of Korea Pohang Accelerator Laboratory Beamline DivisionPohangRepublic of Korea European Synchrotron Radiation Facility France

Mo_(2)c is an excellent electrocatalyst for hydrogen evolution reaction(hER).however,Mo_(2)c is a poor electrocatalyst for oxygen evolution reaction(OER).herein,two different elements,namely co and Fe,are incorporated in Mo_(2)c that,therefore,has a finely tuned electronic structure,which is not achievable by incorporation of any one of the ***,the resulting electrocatalyst co_(0.8)Fe_(0.2)-Mo_(2)c-80 displayed excellent OER catalytic performance,which is evidenced by a low overpotential of 214.0(and 246.5)mV to attain a current density of 10(and 50)mA cm^(-2),an ultralow Tafel slope of 38.4 mV dec^(-1),and longterm stability in alkaline *** data demonstrates that co_(0.8)Fe_(0.2)-Mo_(2)c-80 requires the lowest overpotential(1.00 V)for OER and co centers to be the active *** ultrahigh catalytic performance of the electrocatalyst is attributed to the excellent intrinsic catalytic activity due to high Brunauer-Emmett-Teller specific surface area,large electrochemically active surface area,small Tafel slope,and low chargetransfer resistance.

关键词： fine-tuning electronic structures heteronanostructures Mo_(2)c multimetal(co/Fe) oxygen evolution reaction

Bidirectional rotating direct-current triboelectric nanogenerator with self-adaptive mechanical switching for harvesting reciprocating motion

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International Journal of Extreme Manufacturing 2024年第4期6卷 324-335页

作者： Donghan Lee Joonmin chae Sumin cho Jong Woo Kim Awais Ahmad Mohammad Rezaul Karim Moonwoo La Sung Jea park Dongwhi choi Department of Mechanical Engineering(Integrated Engineering Program) Kyung Hee University1732 Deogyeong-daeroYonginGyeonggi 17104Republic of Korea Department of chemistry University of LahoreLahorePakistan Department of Mechanical Engineering College of EngineeringKing Saud UniversityRiyadh 11421Saudi Arabia School of Mechanical Engineering Korea University of Technology and Education1600 Chungjeol-roCheonanChungnam 31253Republic of Korea

Amid the growing interest in triboelectric nanogenerators(TENGs)as novel energy-harvesting devices,several studies have focused on direct current(Dc)TENGs to generate a stable Dc output for operating electronic ***,owing to the working mechanisms of conventional Dc TENGs,generating a stable Dc output from reciprocating motion remains a ***,we propose a bidirectional rotating Dc TENG(BiR-TENG),which can generate Dc outputs,regardless of the direction of rotation,from reciprocating *** distinct design of the BiR-TENG enables the mechanical rectification of the alternating current output into a rotational-direction-dependent Dc ***,it allows the conversion of the rotational-direction-dependent Dc output into a unidirectional Dc output by adapting the configurations depending on the rotational *** to these tailored design strategies and subsequent optimizations,the BiR-TENG could generate an effective unidirectional Dc *** of the BiR-TENG for the reciprocating motions of swinging doors and waves were demonstrated by harnessing this *** study demonstrates the potential of the BiR-TENG design strategy as an effective and versatile solution for energy harvesting from reciprocating motions,highlighting the suitability of Dc outputs as an energy source for electronic devices.

关键词： direct-current triboelectric nanogenerator mechanical rectification self-adaptive mechanical design harvesting reciprocation motion

A detailed comparison of the composition of(RE)-Ba-cu-O-Ag bulk superconductors

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Superconductivity 2024年第1期9卷 87-94页

作者： J.V.J.congreve Y.Shi A.R.Dennis h.Druiff N.c.Tutt D.A.cardwell J.h.Durrell Department of Engineering University of CambridgeCambridgeUK

The homogeneity of the microstructure and composition are critical in determining the properties of rare earthbarium‐cuprate,single grain bulk superconductors[(RE)BcO].The magnitude of the trapped magnetic field achieveable in these technologically important materials,in particular,is influenced heavily by the size and distribution of(RE)_(2)BacuO_(x)(RE‐211)flux pinning inclusions in the bulk microstructure,whereas the size and distribution of silver agglomerates present within the bulk superconducting matrix correlate directly with improved mechanical *** careful engineering,these materials have significant potential for application in range of devices related to energy storage,medicine,electro‐magnetic machinery and microelectronic *** of(RE)BcO bulk superconductors typically involves heating a powder compact above its peritectic decomposition temperature followed by slow cooling to facilitate the growth of a single ***(RE)BcO composition has a different peritectic temperature and growth rate,which,therefore,necessitates different requirements in the heating *** fabrication temperature and growth rate,for example,may have an effect on the RE‐211 and silver distribution,which may,in turn,affect the superconducting properties of the resulting single *** this work we compare the distributions of silver and RE‐211 in the single grain microstructures of YBcOAg,GdBcO‐Ag,EuBcO‐Ag and SmBcO‐Ag bulk superconductors using optical microscopy,scanning electron microscopy and energy dispersive X‐ray *** observe that the distributions are very similar along both the a/b‐axis and c‐axis of these *** suggests that factors other than the maximum temperature used to achieve peritectic decomposition and the rate of single grain growth are particularly influential in determining the properties of the as‐processed samples in the top seeded melt growth *** observation demonstrates there is freedom to us

关键词： YBcO‐Ag GdBcO‐Ag SmBcO‐Ag EuBcO‐Ag composition Bulk superconductor

Effect of mitomycin c on the corneal endothelial cells of Saudi patients with myopia after transepithelial photorefractive keratectomy:a two-armed c.h.rt study

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International Journal of Ophthalmology(English edition) 2024年第5期17卷 909-915页

作者： Sultan h Alrashidi Department of Ophthalmology College of MedicineQassim UniversityBuraidah 51452Saudi Arabia

AIM:To study the effect of mitomycin c(MMc)applied during transepithelial photorefractive keratectomy(TPRK)on the corneal endothelium one week(W1)and three months(M3)after surgery and its ***:In this two-armed c.h.rt study conducted in 2022,eyes treated with MMc during TPRK(group 1)were compared with eyes not treated with MMc(group 2).The corneal endothelial cell(Ec)count,Ec density(EcD;cells/mm2),average(μm2),standard deviation(μm2),coefficient of variation(cV%),Ecmax,Ecmin,and Ec percentage of hexagonality were estimated at W1 and *** postoperative changes in the Ec count in the two groups were compared and correlated with the other independent ***:Group 1 had 26 eyes,and group 2 had 78 *** TPRK indices were significantly higher for the eyes in group 1 than for those in group *** MMc usage was not a significant predictor of the change in EcD(P=0.644),change in cV(P=0.374),and change in the percentage of hexagonality of Ec(P=0.164)at ***,the use of MMc was a significant predictor of changes in cV(P=0.014)and the change in the percentage of hexagonality of Ec(P=0.039)at *** duration of laser exposure and the size of the optical zone influenced the correlation of MMc use with the changes in Ec indices,***:The use of MMc doesn’t affect EcD,cV,and percentage of hexagonality at W1 if other surgical indices are *** M3 after operating myopic eyes by TPRK,MMc significantly influence the cV and percentage of *** duration of the laser application and the size of the optical zone should be considered when determining the effect of MMc on the Ec indices.

关键词： transepithelial photorefractive keratectomy mitomycin-c corneal endothelium

Structural and electrochemical stabilization enabling high-energy P3-type cr-based layered oxide cathode for K-ion batteries

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carbon Energy 2024年第5期6卷 81-93页

作者： Wonseok Ko Seokjin Lee hyunyoung park Jungmin Kang Jinho Ahn Yongseok Lee Gwangeon Oh Jung-Keun Yoo Jang-Yeon hwang Jongsoon Kim Department of Energy Science Sungkyunkwan UniversitySuwonRepublic of Korea SKKU Institute of Energy Science and Technology(SIEST) Sungkyunkwan UniversitySuwonRepublic of Korea Department of Energy Engineering Hanyang UniversitySeoulRepublic of Korea carbon composites Department Korea Institute of Materials Science(KIMS)ChangwonRepublic of Korea Department of Battery Engineering Hanyang UniversitySeoulRepublic of Korea

Layered-type transition metal(TM)oxides are considered as one of the most promising cathodes for K-ion batteries because of the large theoretical gravimetric capacity by low molar ***,they suffer from severe structural change by de/intercalation and diffusion of K^(+)ions with large ionic size,which results in not only much lower reversible capacity than the theoretical capacity but also poor power ***,it is important to enhance the structural stability of the layered-type TM oxides for outstanding electrochemical behaviors under the K-ion battery ***,it is investigated that the substitution of the appropriate Ti^(4+)contents enables a highly enlarged reversible capacity of P3-type KxcrO_(2) using combined studies of first-principles calculation and various *** the pristine P3-type KxcrO_(2) just exhibits the reversible capacity of∼120 mAh g^(−1) in the voltage range of 1.5-4.0 V(vs.K^(+)/K),the∼0.61 mol K^(+)corresponding to∼150 mAh g^(−1) can be reversible de/intercalated at the structure of P3-type K0.71[cr_(0.75)Ti_(0.25)]O_(2) under the same ***,even at the high current density of 788 mA g^(−1),the specific capacity of P3-type K0.71[cr_(0.75)Ti_(0.25)]O_(2) is∼120 mAh g^(−1),which is∼81 times larger than that of the pristine P3-type KxcrO_(2).It is believed that this research can provide an effective strategy to improve the electrochemical performances of the cathode materials suffered by severe structural change that occurred during charge/discharge under not only K-ion battery system but also other rechargeable battery systems.

关键词： cathodes first-principles calculations layered-type oxide materials potassium-ion batteries structural stabilization