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Controllable Electrochemical Liberation of Hydrogen from Sodium Borohydride

Angewandte Chemie 2023年第4期136卷

作者： Xi Liu Wei Sun Junxiang Chen Prof. Zhenhai Wen CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Materials and Techniques toward Hydrogen Energy Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China

Sodium borohydride (NaBH 4 ) has earned recognition as a promising hydrogen carrier, attributed to its exceptional hydrogen storage capacity, boasting a high theoretical storage capacity of 10.8 wt %. Nonetheless, the utilization of traditional pyrolysis and hydrolysis methods still presents a formidable challenge in achieving controlled hydrogen generation especially under ambient conditions. In this work, we report an innovative electrochemical strategy for production H 2 by coupling NaBH 4 electrooxidation reaction (BOR) at anode in alkaline media with hydrogen evolution reaction (HER) at cathode in acidic media. To implement this, we have developed a bifunctional electrocatalyst denoted as Pd-Mo 2 C@CNTs, wherein Pd nanoparticles are grown in situ on Mo 2 C embedded within N-doped carbon nanotubes. This electrocatalyst demonstrates exceptional performance in catalyzing both alkaline BOR and acidic HER. We have developed a hybrid acid/alkali cell, utilizing Pd/Mo 2 C@CNTs as the anode and cathode electrocatalysts. This configuration showcases remarkable capabilities for self-sustained, precise, and uninterrupted indirect release of H 2 stored in NaBH 4 , even at high current densities of 100 mA cm −2 with a Faraday efficiency approaching 100 %. Additionally, this electrochemical device exhibits significant promise as a fuel cell, with the ability to deliver a maximum power density of 20 mW cm −2 .

关键词： Bifunctional Electrocatalyst Controllable Release Hydrogen Hybrid Acid/Alkali Cell Hydrogen Carriers Sodium Borohydride

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From Jackfruit Rags to Hierarchical Porous N-Doped Carbon: A High-Performance Anode Material for Sodium-Ion Batteries

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Transactions of Tianjin University 2019年第5期25卷 429-436页

作者： Baisheng Zhao Yichun Ding Zhenhai Wen CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China

Renewable biomass-derived carbon materials have attracted increasing research attention as promising electrode materials for electrochemical energy storage devices, such as sodium-ion batteries (SIBs), due to their outstanding electrical conductivity, hierarchical porous structure, intrinsic heteroatom doping, and environmental friendliness. Here, we investigate the potential of hierarchical N-doped porous carbon (NPC) derived from jackfruit rags through a facile pyrolysis as an anode material for SIBs. The cycling performance of NPC at 1 A/g for 2000 cycles featured a stable reversible capacity of 122.3 mA h/g with an outstanding capacity retention of 99.1%. These excellent electrochemical properties can be attributed to the unique structure of NPC;it features hierarchical porosity with abundant carbon edge defects and large speci c surface areas. These results illuminate the potential application of jackfruit rags-derived porous carbon in SIBs.

关键词： Porous carbon N-doped carbon Sodium-ion battery Anode Jackfruit rags Energy storage and conversion

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用于二维器件的先进介电材料（英文）

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Science Bulletin 2025年第3期 295-296页

作者：张昊卢致文温珍海 Department of Chemical Engineering Massachusetts Institute of Technology Department of Chemistry University of Oxford CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Materials and Techniques toward Hydrogen EnergyFujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

As the application potential of two-dimensional (2D) materials in fields such as nanoelectronics, optoelectronics, and quantum computing continues to grow, the challenge of fabricating highquality dielectric layers has become crucial to the performance of2D devices [1,2]. Traditional dielectric materials like silicon dioxide and aluminum oxide face several issues when applied to 2D materials, including high leakage currents, large interface state density,difficulties in thin-layer deposition, and insufficient electrical and mechanical stability, all of which limit the performance and reliability of devices [3–5]. To address these challenges, researchers are exploring new dielectric materials and fabrication techniques, such as single-crystal oxides, to achieve higher-performing 2D electronic devices [6,7].

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Construction of a Z-Scheme Cdin2s4/Zns Heterojunction for the Enhanced Photocatalytic Hydrogen Evolution

SSRN

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SSRN 2022年

作者： Xie, Linjun Liu, Guozhong Suo, Rongbo Xie, Ziyu Liu, Haizhen Chen, Jinglin Chen, Jing Lu, Can-Zhong Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry Department of Materials Metallurgy and Chemistry Jiangxi University of Science and Technology Ganzhou341000 China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research the Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare-earth Materials Haixi Institutes Chinese Academy of Sciences Xiamen361021 China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fujian Fuzhou350108 China University of Chinese Academy of Sciences Beijing100049 China

In this paper, CdIn2S4/ZnS nanocomposites were prepared by a one-step hydrothermal method. The structures and physicochemical properties of the nanocomposites were characterized by XRD, SEM, TEM, XPS, UV-Vis, TPR, EIS, PL and ESR. The activity of photocatalytic water splitting for hydrogen evolution of CdIn2S4/xZnS composites (x is the molar ratio of CdIn2S4 to ZnS) are much better than that of the pristine ZnS and CdIn2S4. The optimal catalyst CdIn2S4/12ZnS exhibits the best performance. Within 3 h, the hydrogen production reaches 11.23 mmol·g-1, which is about 59.1 and 14.4 times that of pure CdIn2S4 and ZnS. The reasons for the better performance of CdIn2S4/xZnS are the strong interaction between CdIn2S4 and ZnS, the higher SBET, the formation of Z-scheme heterojunction, the more efficient charge separation, the extension light response, the higher electron immigration, and the stronger redox properties. Moreover, the possible hydrogen production mechanism is proposed by the study of photoelectrochemical and EPR, which implies it is a Z-scheme photosystem. This work provides an effective method for the modification of ZnS catalysts for the application in photocatalytic hydrogen evolution. © 2022, The Authors. All rights reserved.

关键词： Zinc sulfide

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Macroscopic electro-optical modulation of solution-processed molybdenum disulfide

arXiv

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arXiv 2024年

作者： Liu, Songwei Wen, Yingyi Pei, Jingfang Fan, Xiaoyue Zhou, Yongheng Liu, Yang Ng, Ling-Kiu Lin, Yue Ma, Teng Zhang, Panpan Chen, Xiaolong Wang, Gang Hu, Guohua Department of Electronic Engineering The Chinese University of Hong Kong Shatin Hong Kong School of Physics Beijing Institute of Technology Beijing100081 China Department of Electrical and Electronic Engineering Southern University of Science and Technology Shenzhen518055 China Shun Hing Institute of Advanced Engineering The Chinese University of Hong Kong Shatin 999077 Hong Kong CAS Key Laboratory of Design and Assembly of Functional Nanostructures State Key Laboratory of Structural Chemistry Fujian Institute of Research The Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China Department of Applied Physics Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing100876 China

Molybdenum disulfide (MoS2) has drawn great interest for tunable photonics and optoelectronics advancement. Its solution processing, though scalable, results in randomly networked ensembles of discrete nanosheets with compromised properties for tunable device fabrication. Here, we show via density-functional theory calculations that the electronic structure of the individual solution-processed nanosheets can be modulated by external electric fields collectively. Particularly, the nanosheets can form Stark ladders, leading to variations in the underlying optical transition processes and thus, tunable macroscopic optical properties of the ensembles. We experimentally confirm the macroscopic electro-optical modulation employing solution-processed thin-films of MoS2 and ferroelectric P(VDF-TrFE), and prove that the localized polarization fields of P(VDFTrFE) can modulate the optical properties of MoS2, specifically, the optical absorption and photoluminescence on a macroscopic scale. Given the scalability of solution processing, our results underpin the potential of electro-optical modulation of solution-processed MoS2 for scalable tunable photonics and optoelectronics. As an illustrative example, we successfully demonstrate solution-processed electro-absorption modulators. Copyright © 2024, The Authors. All rights reserved.

关键词： Layered semiconductors

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Nano3 Assisted Gelatin-Derived Multi-Level Porous Carbon Aerogel Loaded Fe Single-Atom for High Efficient Oxygen Reduction Reaction

SSRN

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SSRN 2022年

作者： Xie, Yiming Wu, Tao Zhu, Shufei Ma, Qian Lu, Canzhong Engineering Research Center of Environment-Friendly Functional Materials Ministry of Education Institute of Materials Physical Chemistry Huaqiao University Xiamen361021 China Research Center of Medical Sciences Guangdong Provincial People’s Hospital Guangzhou Guangdong 510080 China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research the Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Center of Rare-earth Materials Haixi Institutes Chinese Academy of Sciences Xiamen361021 China

Thermally induced aggregation into nanoparticles and micropores-dominated structures are commonly encountered issues in loading SACs on carbonaceous supports, leading to low exposure ratio of active sites and inadequate mass transference. Herein, we fabricated a series of gelatin-derived carbon-aerogels (GDCAx) to prevent the aggregation of Fe atom and form the hierarchically porous nanonetwork, and thus the Fe SACs (Fe-N-GDCAx) with abundant and hierarchical pores are obtained after pyrolysis. The Fe-N-GDCAx has plentiful accessible Fe-Nx active sites and mass transfer pathways, benefiting to ORR procedure. The optimal sample Fe-N-GDCA0.8 without other gas assisted during annealing (only in argon atmosphere) exhibits exceedingly excellent half-wave potential (E1/2) of 0.93 V (vs. RHE) in 0.1 M KOH. Aqueous zinc-air battery assembled with Fe-N-GDCA0.8 presents ultrahigh specific capacitance of 803.4 mAh gZn-1 (close to 824 mAh gZn-1 theoretical value) and long-term stability. © 2022, The Authors. All rights reserved.

关键词： Iron

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High-security-level multi-dimensional optical storage medium:nanostructured glass embedded with LiGa_(5)O_(8):Mn^(2+) with photostimulated luminescence

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Light(Science & Applications) 2020年第1期9卷 1799-1808页

作者： Shisheng Lin Hang Lin Chonggeng Ma Yao Cheng Sizhe Ye Fulin Lin Renfu Li Ju Xu Yuansheng Wang Key Laboratory of Optoelectronic Materials Chemistry and Physics Key Laboratory of Design and Assembly of Functional NanostructuresFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002China University of Chinese Academy of Sciences Beijing 100049China CQUPT-BRU Innovation Institute Chongqing University of Posts and TelecommunicationsChongqing 400065China Xiamen Institute of Rare-earth Materials Haixi InstitutesChinese Academy of SciencesXiamenFujian 361000China

The launch of the big data era puts forward challenges for information preservation technology,both in storage capacity and ***,a brand new optical storage medium,transparent glass ceramic(TGC)embedded with photostimulated LiGa5O8:Mn2+nanocrystals,capable of achieving bit-by-bit optical data write-in and read-out in a photon trapping/detrapping mode,is *** highly ordered nanostructure enables light–matter interaction with high encoding/decoding resolution and low bit error ***,going beyond traditional 2D optical storage,the high transparency of the studied bulk medium makes 3D volumetric optical data storage(ODS)possible,which brings about the merits of expanded storage capacity and improved information *** application confirmed the erasable-rewritable 3D storage of binary data and display items in TGC with intensity/wavelength *** present work highlights a great leap in photostimulated material for ODS application and hopefully stimulates the development of new multi-dimensional ODS media.

关键词： optical glass trapping

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Mini Light-Emitting Diode Technology with High Quantum Efficient NIR-II Partially Inverse Spinel MgGa2O4:Cr3+,Ni2+ Nanophosphors

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Advanced Optical Materials 2024年第19期12卷

作者： Satpathy, Aishwarya Huang, Wen-Tse Liu, Tzu-Hsuan Su, Ting-Yi Zhang, Wei Kamiński, Mikolaj Grzegorczyk, Maciej Chen, Jia-Hao Cherng, Ding-Hua Lu, Kuang-Mao Chen, Xueyuan Mahlik, Sebastian Liu, Ru-Shi Department of Chemistry National Taiwan University Taipei106 Taiwan Fujian Key Laboratory of Nanomaterials and CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China Nanoscience and Technology Program Taiwan International Graduate Program Academia Sinica and National Taiwan University Academia Road 128 Taipei Nankang115 Taiwan Institute of Experimental Physics Faculty of Mathematics Physics and Informatics University of Gdańsk Wita Stwosza 57 Gdańsk80–308 Poland Everlight Electronics Co. Ltd. New Taipei City238 Taiwan International Centre for Theory of Quantum Technologies University of Gdańsk Gdańsk80–308 Poland

The increasing demand for second near-infrared (NIR-II) region materials, which retain the advantage of minimal scattering and immense applications in the medical and NIR spectroscopy field, has led to considerable research in this region. A mini light-emitting diode (mini-LED) is essential for backlighting liquid crystal displays, indicating the need for the small size of phosphors. However, current market phosphors must be more significant to be a viable option for mini-LEDs. This scenario necessitates the synthesis of small-sized phosphors to be used in mini-LEDs. In this work, a mesoporous silica nanoparticle (MSN) and incorporated the Mg1−yGa2−xO4:xCr3+,yNi2+ system is fabricated. The structural investigation confirmed the single phase of MgGa2O4 with a pore size of 2.73 nm for the MSN. The results showed a steady NIR-II signal at 1270 nm and an enhanced energy transfer with a high quantum yield of 79.2% for a nanophosphor. The mini-LED package revealed a 1000–1600 nm signal, qualifying the nanophosphor for realistic applications. This work can make provisions for various NIR-II nanophosphors in the LED industry. © 2024 Wiley-VCH GmbH.

关键词： Energy transfer

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Decoupled Artificial Photosynthesis

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Angewandte Chemie 2023年第23期135卷

作者： Dr. Linlin Zhang Prof. Yaobing Wang CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 China Dalian National Laboratory for Clean Energy Dalian 116023 China

Natural photosynthesis (NP) generates oxygen and carbohydrates from water and CO 2 utilizing solar energy to nourish lives and balance CO 2 levels. Following nature, artificial photosynthesis (AP), typically, overall water or CO 2 splitting, produces fuels and chemicals from renewable energy. However, hydrogen evolution or CO 2 reduction is inherently coupled with kinetically sluggish water oxidation, lowering efficiencies and raising safety concerns. Decoupled systems have thus emerged. In this review, we elaborate how decoupled artificial photosynthesis (DAP) evolves from NP and AP and unveil their distinct photoelectrochemical mechanisms in energy capture, transduction and conversion. Advances of AP and DAP are summarized in terms of photochemical (PC), photoelectrochemical (PEC), and photovoltaic-electrochemical (PV-EC) catalysis based on material and device design. The energy transduction process of DAP is emphasized. Challenges and perspectives on future researches are also presented.

关键词： Artificial Photosynthesis Decoupling Energy Transduction Mediator Zn-CO2 Battery

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Tumor Microenvironment cascade‑Responsive Nanodrug with Self‑Targeting Activation and ROS Regeneration for Synergistic Oxidation‑Chemotherapy

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Nano-Micro Letters 2020年第12期12卷 344-361页

作者： Yang Li Jinyan Lin Peiyuan Wang Qiang Luo Fukai Zhu Yun Zhang Zhenqing Hou Xiaolong Liu Jingfeng Liu CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002People’s Republic of China The United Innovation of Mengchao Hepatobiliary Technology Key Laboratory of Fujian Province Mengchao Hepatobiliary Hospital of Fujian Medical UniversityFuzhou 350025People’s Republic of China Department of Translational Medicine Xiamen Institute of Rare Earth MaterialsChinese Academy of SciencesXiamen 361024People’s Republic of China College of Materials Xiamen UniversityXiamen 361005People’s Republic of China

Carrier-free nanodrug with exceptionally high drug payload has attracted increasing ***,we construct a pH/ROS cascade-responsive nanodrug which could achieve tumor acidity-triggered targeting activation followed by circularly amplified ROS-triggered drug release via positive-feedback *** di-selenide-bridged prodrug synthesized from vitamin E succinate and methotrexate(MTX)self-assembles into nanoparticles(VSeM);decorating acidity-cleavable PEG onto VSeM surface temporarily shields the targeting ability of MTX to evade immune clearance and consequently elongate circulation *** reaching tumor sites,acidity-triggered detachment of PEG results in targeting recovery to enhance tumor cell ***,the VSeM could be dissociated in response to intracellular ROS to trigger VES/MTX release;then the released VES could produce extra ROS to accelerate the collapse of ***,the excessive ROS produced from VES could synergize with the released MTX to efficiently suppress tumor growth via orchestrated *** study provides a novel strategy to engineer cascade-responsive nanodrug for synergistic cancer treatment.

关键词： Targeting activation Positive-feedback loop Circular amplification of ROS Vitamin E nanodrug Synergistic oxidationchemotherapy

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