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Carbon energy 2024年第4期6卷 164-221页

作者： Huilin Hou Gang Shao Yang Wang Wai‐Yeung Wong Weiyou Yang institute of Micro/Nano Materials and Devices Ningbo University of TechnologyNingboChina School of Materials Science and Engineering Zhengzhou UniversityZhengzhouChina department of applied biology and chemical technology and research institute for smart energy The Hong Kong Polytechnic UniversityHong KongChina

Conversion of solar energy into H_(2) by photoelectrochemical(PEC)water splitting is recognized as an ideal way to address the growing energy crisis and environmental *** a typical PEC cell,the construction of photoanodes is crucial to guarantee the high efficiency and stability of PEC reactions,which fundamentally rely on rationally designed semiconductors(as the active materials)and substrates(as the current collectors).In this review work,we start with a brief introduction of the roles of substrates in the PEC ***,we provide a systematic overview of representative strategies for the controlled fabrication of photoanodes on rationally designed substrates,including conductive glass,metal,sapphire,silicon,silicon carbide,and flexible ***,some prospects concerning the challenges and research directions in this area are proposed.

关键词： hydrogen photoanode photoelectrochemical substrates water splitting

Polyethylene interfacial dielectric layer for organic semiconductor single crystal based field-effect transistors

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Chinese chemical Letters 2024年第4期35卷 431-435页

作者： Min Chen Boyu Peng Xuyun Guo Ye Zhu Hanying Li department of Polymer Science and Engineering MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationInternational Research Center for X PolymersShanxi-Zheda Institute of Advanced Materials and Chemical EngineeringZhejiang UniversityHangzhou 310027China department of applied Physics Research Institute for Smart EnergyThe Hong Kong Polytechnic UniversityHong Kong 999077China

Organic semiconductor single crystals(OSSCs) have shown their promising potential in high-performance organic field-effect transistors(OFETs). The interfacial dielectric layers are critical in these OFETs as they not only govern the key semiconductor/dielectric interface quality but also determine the growth of OSSCs by their wetting properties. However, reported interfacial dielectric layers either need rigorous preparation processes, rely on certain surface chemistry reactions, or exhibit poor solvent resistance, which limits their applications in low-cost, large-area, monolithic fabrication of OSSC-based OFETs. In this work, polyethylene(PE) thin films and lamellar single crystals are utilized as the interfacial dielectric layers, providing solvent resistive but wettable surfaces that facilitate the crystallization of 6,13-bis(tri-isopropylsilylethynyl)pentacene(TIPS-PEN) and 6,13-bis(triisopropylsilylethynyl)-5,7,12,14-tetraazapentacene(TIPS-TAP). As evidenced by the presence of ambipolar behavior in TIPS-PEN single crystals and the high electron mobility(2.3 ± 0.34 cm^(2)V^(-1)s^(-1)) in TIPS-TAP single crystals, a general improvement on electron transport with PE interfacial dielectric layers is revealed, which likely associates with the chemically inertness of the saturated C-H bonds. With the advantages in both processing and device operation, the PE interfacial dielectric layer potentially offers a monolithic way for the enhancement of electron transport in solution-processed OSSC-based OFETs.

关键词： Polyethylene Interfacial dielectric layer Organic semiconductor Single crystal Organic field-effect transistors

Atomscopic of ripple origins for two-dimensional monolayer transition metal dichalcogenides

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Nano research 2024年第3期17卷 2136-2144页

作者： Haitao Yu Mingzi Sun Xiao Wu Cheuk Hei Chan Bolong Huang Zhong Lin Wang CAS Center for Excellence in Nanoscience Beijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China School of Nanoscience and technology University of Chinese Academy of SciencesBeijing 100049China department of applied biology and chemical technology The Hong Kong Polytechnic UniversityKowloon 999077Hong KongChina research Centre for Carbon-Strategic Catalysis The Hong Kong Polytechnic UniversityKowloon 999077Hong KongChina School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGeorgia 30332USA

During the development of ultrathin two-dimensional(2D)materials,the appearance of ripples has been widely ***,the formation mechanisms and their influences are still rarely investigated,especially their contributions to the electronic structures and optical *** compensate for the knowledge gap,we have carried out comprehensive theoretical studies on the monolayer WSe_(2) with a series of ripple structures from 0 to 12Åin different lattice *** sensitivity of the formation energy,band structures,electronic structures,and optical properties to the ripple structures have been performed systematically for the first *** formation of ripples in Armchair and zigzag simultaneously are more energetically favorable,leading to more flexible optimizations of the optoelectronic *** improved charge-locking effect and extension of absorption ranges indicate the significant role of ripple *** spontaneous formation of ripples is associated with orbital rearrangements and structural *** leads to the unique charge carrier correlate inversion between W-5d and Se-4p orbitals,resulting in the pinning of the Fermi *** work has supplied significant references to understand ultrathin 2D structures and benefit their future developments and applications in high-performance optoelectronic devices.

关键词： two-dimensional(2D)materials ripples strain effect charge carrier correlation inversion optoelectronic properties

Non-bonding modulations between single atomic cerium and monodispersed selenium sites towards efficient oxygen reduction

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Nano research 2024年第6期17卷 4753-4763页

作者： Leilei Yin Shuai Zhang Mingzi Sun Siyuan Wang Bolong Huang Yaping Du Tianjin Key Lab for Rare Earth Materials and Applications Center for Rare Earth and Inorganic Functional MaterialsHaihe Laboratory of Sustainable Chemical TransformationsSmart Sensing Interdisciplinary Science CenterSchool of Materials Science and EngineeringNational Institute for Advanced MaterialsNankai UniversityTianjin 300350China department of applied biology and chemical technology The Hong Kong Polytechnic UniversityHung HomKowloon 999077Hong KongChina research Centre for Carbon-Strategic Catalysis The Hong Kong Polytechnic UniversityHung HomKowloon 999077Hong KongChina

Currently,dual atomic catalysts(DACs)with neighboring active sites for oxygen reduction reaction(ORR)still meet lots of challenges in the synthesis,especially the construction of atomic pairs of elements from different blocks of the periodic ***,a“rare earth(Ce)-metalloid(Se)”non-bonding heteronuclear diatomic electrocatalyst has been constructed for ORR by rational coordination and carbon support defect ***,the optimized Ce-Se diatomic catalysts(Ce-Se DAs/NC)displayed a half-wave potential of 0.886 V *** hydrogen electrode(RHE)and excellent stability,which surpass those of separate Ce or Se single atoms and most single/dual atomic catalysts ever *** addition,a primary zinc-air battery constructed using Ce-Se DAs/NC delivers a higher peak power density(209.2 mW·cm^(−2))and specific capacity(786.4 mAh·gZn^(−1))than state-of-the-art noble metal catalysts Pt/*** calculations reveal that the Ce-Se DAs/NC has improved the electroactivity of the Ce-N_(4)region due to the electron transfer towards the nearby Se specific activity(SA)***,the more electron-rich Se sites promote the adsorptions of key intermediates,which results in the optimal performances of ORR on Ce-Se DAs/*** work provides new perspectives on electronic structure modulations via non-bonded long-range coordination micro-environment engineering in DACs for efficient electrocatalysis.

关键词： catalyst rare earth oxygen reduction reaction(ORR) metalloid non-bonding modulation

Dilute Aqueous-Aprotic Electrolyte Towards Robust Zn-Ion Hybrid Supercapacitor with High Operation Voltage and Long Lifespan

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Nano-Micro Letters 2024年第9期16卷 1-12页

作者： Shuilin Wu Yibing Yang Mingzi Sun Tian Zhang Shaozhuan Huang Daohong Zhang Bolong Huang Pengfei Wang Wenjun Zhang Key Laboratory of Catalysis and energy Materials Chemistry of Ministry of Education&Hubei Key Laboratory of Catalysis and Materials Science South-Central Minzu UniversityWuhan 430074People’s Republic of China department of Materials Science and Engineering and Center of Super‑Diamond and Advanced FilmsCity University of Hong Kong83 Tat Chee AvenueKowloon TongHong Kong SARPeople’s Republic of China department of applied biology and chemical technology The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARPeople’s Republic of China Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijingPeople’s Republic of China

With the merits of the high energy density of batteries and power density of supercapacitors,the aqueous Zn-ion hybrid supercapacitors emerge as a promising candidate for applications where both rapid energy delivery and moderate energy storage are ***,the narrow electrochemical window of aqueous electrolytes induces severe side reactions on the Zn metal anode and shortens its *** also limits the operation voltage and energy density of the Zn-ion hybrid ***'water in salt'electrolytes can effectively broaden their electrochemical windows,but this is at the expense of high cost,low ionic conductivity,and narrow temperature compatibility,compromising the electrochemical performance of the Zn-ion hybrid ***,designing a new electrolyte to balance these factors towards high-performance Zn-ion hybrid supercapacitors is urgent and *** developed a dilute water/acetonitrile electrolyte(0.5 m Zn(CF_(3)SO_(3))_(2)+1 m LiTFSI-H_(2)O/AN)for Zn-ion hybrid supercapacitors,which simultaneously exhibited expanded electrochemical window,decent ionic conductivity,and broad temperature *** this electrolyte,the hydration shells and hydrogen bonds are significantly modulated by the acetonitrile and *** a result,a Zn-ion hybrid supercapacitor with such an electrolyte demonstrates a high operating voltage up to 2.2 V and long lifespan beyond 120,000 cycles.

关键词： Zn-ion supercapacitors Zn metal anode Electrolyte engineering Hydrogen bonds Solvation structures

The Fabrication and Detection Performance of High Sensitivity Au-Ag Alloy Nanostar/Paper Flexible Surface Enhanced Raman Spectroscopy Sensors

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Journal of Wuhan University of technology(Materials Science) 2024年第2期39卷 436-443页

作者：邓芷盈 WANG Tianyi CAO Shiyi ZHAO Yuan HAN Xiaoyu 张继红谢俊 State Key Laboratory of Silicate Materials for Architectures department of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China Hainan institute of Wuhan University of technology Sanya 572000China International School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China Hepu research Center for Silicate Materials Industry technology Beihai 536100China

Au-Ag alloy nanostars based flexible paper surface enhanced Raman spectroscopy sensors were fabricated through simple nanostar coating on regular office paper,and the surface enhanced Raman spectroscopy detection performances were investigated using crystal violet dye ***-Ag nanostars with sharp tips were synthesized via metal ions reduction *** electron microscope images,X-Ray diffraction pattern and energy dispersive spectroscopy elemental mapping confirmed the nanostar geometry and Au/Ag components of the ***-Vis-NIR absorption spectrum shows wide local surface plasmon resonance induced optical *** addition,finite-difference time-domain simulation shows much stronger electromagnetic field from nanostars than from sphere *** effect of coating layer on Raman signal intensities was discussed,and optimized 5-layer coating with best Raman signal was *** Au-Ag nanostatrs homogeneously distribute on paper fiber *** detection limit is 10-10 M,and the relationship between analyte concentrations and Raman signal intensities shows well linear,for potential quantitative *** calculated enhancement factor is 4.795×10^(6).The flexible paper surface enhanced Raman spectroscopy sensors could be applied for trace chemical and biology molecule detection.

关键词： surface-enhanced raman gold-silver alloy nanostars paper-based SERS sensor flexibility

Moisture‑Electric–Moisture‑Sensitive Heterostructure Triggered Proton Hopping for Quality‑Enhancing Moist‑Electric Generator

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Nano-Micro Letters 2024年第3期16卷 351-366页

作者： Ya’nan Yang Jiaqi Wang Zhe Wang Changxiang Shao Yuyang Han Ying Wang Xiaoting Liu Xiaotong Sun Liru Wang Yuanyuan Li Qiang Guo Wenpeng Wu Nan Chen Liangti Qu Key Laboratory of Cluster Science Ministry of Education of ChinaKey Laboratory of Photoelectronic/Electrophotonic Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081People’s Republic of China Yangtze Delta Region Academy of Beijing institute of technology Jiaxing 314019People’s Republic of China department of Chemistry Key Laboratory of Organic Optoelectronics&Molecular EngineeringMinistry of EducationTsinghua UniversityBeijing 100084People’s Republic of China

Moisture-enabled electricity(ME)is a method of converting the potential energy of water in the external environment into electrical energy through the interaction of functional materials with water molecules and can be directly applied to energy harvesting and signal ***,ME can be unreliable in numerous applications due to its sluggish response to moisture,thus sacrificing the value of fast energy harvesting and highly accurate information ***,by constructing a moisture-electric-moisture-sensitive(ME-MS)heterostructure,we develop an efficient ME generator with ultra-fast electric response to moisture achieved by triggering Grotthuss protons hopping in the sensitized ZnO,which modulates the heterostructure built-in interfacial potential,enables quick response(0.435 s),an unprecedented ultra-fast response rate of 972.4 mV s^(−1),and a durable electrical signal output for 8 h without any *** research provides an efficient way to generate electricity and important insight for a deeper understanding of the mechanisms of moisture-generated carrier migration in ME generator,which has a more comprehensive working scene and can serve as a typical model for human health monitoring and smart medical electronics design.

关键词： Moist-electric generators Grotthuss proton hopping Fast response Durable electrical output Personal health monitoring

Engineering the axial coordination of cobalt single atom catalysts for efficient photocatalytic hydrogen evolution

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Nano research 2024年第6期17卷 5114-5121页

作者： Ning Kang Lingwen Liao Xue Zhang Zhen He Binlu Yu Jiahong Wang Yongquan Qu Paul KChu Seeram Ramakrishna Xue-Feng Yu Xin Wang Licheng Bai Materials Interfaces Center Shenzhen Institute of Advanced TechnologyChinese Academy of Sciences(CAS)Shenzhen 518055China Key Laboratory of Materials Physics Anhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsChinese Academy of SciencesHefei 230031China department of Chemistry City University of Hong KongKowloonHong Kong 999077China Hong Kong Branch of National Precious Metals Material Engineering research Center(NPMM) City University of Hong KongKowloonHong Kong 999077China Key Laboratory of Special Functional and smart Polymer Materials of Ministry of Industry and Information technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China department of Physics and department of Materials Science and Engineering City University of Hong KongKowloonHong Kong 999077China National University of Singapore(NUS)Centre for Nanofibers and Nanotechnology Department of Mechanical EngineeringNational University of SingaporeSingapore 117542Singapore

Improving the catalytic activity of non-noble metal single atom catalysts(SACs)has attracted considerable attention in materials *** optimizing the local electronic structure of single atom can greatly improve their catalytic activity,it often involves in-plane modulation and requires high ***,we report a novel strategy to manipulate the local electronic structure of SACs via the modulation of axial Co-S bond anchored onto graphitic carbon nitride(C_(3)N_(4))at room temperature(RT).Each Co atom is bonded to four N atoms and one S atom(Co-(N,S)/C_(3)N_(4)).Owing to the greater electronegativity of S in the Co-S bond,the local electronic structure of the Co atoms is available to be controlled at a relatively moderate ***,when employed for the photocatalytic hydrogen evolution reaction,the adsorption energy of intermediate hydrogen(H*)on the Co atoms is remarkably *** the presence of the Co-(N,S)/C_(3)N_(4)SACs,the hydrogen evolution rates reach up to 10 mmol/(g·h),which is nearly 10 and 2.5 times greater than the rates in the presence of previously reported transition metal/C_(3)N_(4)and noble platinum nanoparticles(PtNPs)/C_(3)N_(4)catalysts,*** to the tailorable axial Co-S bond in the SAC,the local electronic structure of the Co atoms can be further optimized for other photocatalytic *** axial coordination engineering strategy is universal in catalyst designing and can be used for a variety of photocatalytic applications.

关键词： transition metal single-atom local electronic structure photocatalytic hydrogen evolution graphitic carbon nitride axial coordination environment

Atomically precise copper nanoclusters as ultrasmall molecular aggregates:Appealing compositions,structures,properties,and applications

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聚集体(英文)

聚集体(英文) 2023年第1期4卷 122-147页

作者： Leon Li-Min Zhang Wai-Yeung Wong department of applied biology and chemical technology and research institute for smart energy The Hong Kong Polytechnic UniversityHong KongP.R.China Shenzhen research institute The Hong Kong Polytechnic UniversityShenzhenP.R.China

Metal nanoclusters(NCs)are ultrasmall molecular aggregates consisting of dozens to hundreds of metal atoms consolidated by organic ligands,which represent an emerging area of *** a myriad of metal NCs,copper NCs(CuNCs)comprise a low-cost,high-value subclass that has attracted great *** variable copper cores and diversity of protecting ligands have rendered CuNCs interesting molecular aggregates featuring structural and compositional versatility,hence showing distinctive properties and potential *** the present review,we have summarized the progress on atomically precise CuNCs that exhibit a range of appealing properties and applications in different *** review is expected to provide not only an overview of the current development on atomically precise CuNCs,but also possible directions for the future design of novel CuNCs for fundamental studies and practical applications.

关键词： applications atomically precise structures copper nanoclusters properties

Steering S-scheme charge transfer via interfacial dipoles induced by amine-containing polyelectrolytes

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Science China Chemistry 2023年第7期66卷 2098-2108页

作者： Tao Li Chuang Feng Biquan Xiong Xuhui Zhu Zhicai He Wai-Yeung Wong institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSchool of Material Science and EngineeringSouth China University of TechnologyGuangzhou 510640China department of applied biology&chemical technology and research institute for smart energy The Hong Kong Polytechnic UniversityHung HomHong KongChina

The lack of a robust interfacial driving source over multicomponent photocatalysts is an essential contributor to the sluggish spatial charge transfer across the heterointerface and severe carrier recombination,thereby rendering maneuvering charge transfer of composite materials a thorny ***,we demonstrate an electric dipole moment-driven charge transfer photosystem utilizing amine-containing polyfluorene polyelectrolyte(i.e.,PFN)and inorganic semiconductor matrices(i.e.,WO_(3))as the building blocks to direct the interfacial charge transfer,effectively targeting the photoexcited charge carriers to the active *** results and theoretical simulations reveal that the electronic coupling interaction between the pendant electron-rich amine groups along the PFN backbone and WO_(3)surface enables the nonuniform charge distribution at the interface over the WO_(3)@PFN heterojunction,which ultimately fosters the formation of interfacial dipoles oriented from conjugated macromolecular backbone of PFN to the surface of WO_(3)*** interfacial dipoles with excellent charge transfer kinetics spontaneously activate the unidirectional and accelerated S-scheme charge motion from the WO_(3)framework to the conjugated chain of PFN due to the suitable band offsets at the interface,thus endowing WO_(3)@PFN heterostructures with a significantly enhanced net efficiency of *** findings would provide some insights into the design of advanced heterojunction photocatalysts for solar energy conversion as well as the study of the working mechanism of polyelectrolyte interlayers in optoelectronic devices.

关键词： photocatalysis heterojunction interfacial dipole polyelectrolyte S-scheme