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Revolutionary Energy Harvesting: Gravity-Driven Piezocatalysts for Sustainable Hydrogen Production in MoS2@Mo2CTx Systems

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Advanced Energy materials 2024年第39期14卷

作者： Lin, Hsun-Yen Wu, Jyh Ming Department of Materials Science and Engineering National Tsing Hua University 101 Section 2 Kuang Fu Road Hsinchu300 Taiwan Ph.D Program in Prospective Functional Materials Industry National Tsing Hua University 101 Section 2 Kuang Fu Road Hsinchu300 Taiwan High Entropy Materials Center National Tsing Hua University 101 Section 2 Kuang Fu Road Hsinchu300 Taiwan

Hydrogen (H2) is mainly produced using steam methane reforming, electrolysis, and gasification, which require external energy and special catalysts. A new catalyst by combining MoS2 nanoflowers (NFs) with metal carbide/nitride nanosheets (Mo2CTx MXene) to create a nanosheet bending moment. The MoS2@Mo2CTx heterostructures achieve a production rate of 1164.8 µmol g−1 h−1 under an application of mechanical force, 4.01 and 3.06 times higher than Mo2CTx and MoS2 alone, due to enhanced charge transfer from MoS2's piezoelectricity and Mo2CTx's conductivity. This study introduces a pioneering methodology that harnesses gravitational energy as a continuous mechanical force, simulated using a peristaltic pump, to drive the piezocatalytic hydrogen evolution reaction (HER), achieving a notable hydrogen production rate of 454.1 µmol g−1 over 24 hours and demonstrating a sustained capability for hydrogen generation. The theoretical calculation results validate the piezoelectric potential in water-flow-pressure triggered HER systems. The piezocatalytic HER system, assuming powered by the Hoover Dam, will produce 290.9 kmoles of hydrogen per ton daily, equivalent to utilizing 19 150 kWh of energy in the electrocatalytic system. The simulated gravity-driven water flow using MoS2@Mo2CTx piezocatalysts for H2 generation demonstrates superior efficiency by eliminating common thermal energy conversion losses, marking a significant breakthrough in sustainable hydrogen production technologies. © 2024 Wiley-VCH GmbH.

关键词： Molybdenum compounds

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From Electrochemical to Mechanical Modeling of SOFCs and their Experimental Validation

From Electrochemical to Mechanical Modeling of SOFCs and the...

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243rd ECS Meeting

作者： Kawada, T. Watanabe, S. Budiman, R.A. Yashiro, K. Sato, K. Hashida, T. Kimura, Y. Nakamura, T. Amezawa, K. Sato, M. Nomura, R. Muramatsu, M. Terada, K. Graduate School of Environmental Studies Tohoku University Sendai980-8579 Japan Fracture and Reliability Research Institute Graduate School of Engineering Tohoku University Sendai980-8579 Japan Institute of Multidisciplinary Research for Advanced Materials Tohoku University Sendai980-98577 Japan Mechanical Design & Analysis Corporation Chofu Tokyo182-0024 Japan International Research Institute of Disaster Science Sendai980-8572 Japan Faculty of Science and Technology Keio University Yokohama223-0061 Japan

ISBN: (纸本)9781607685395

Tohoku University have been conducting research on the mechanical reliability of SOFCs under the financial support by NEDO (New Energy and Industrial technology Development Organization, Japan). Both numerical and experimental approaches have been taken at various levels, from electrochemical to structural analyses. An in-house code, SIMUDEL, was developed to simulate oxygen potential distribution inside the constituent materials in order to account for the chemical strain in cell/stack analyses. Non-linear stress-strain behaviors and inelastic deformation of the materials were characterized to improve the accuracy of the simulation. Predicting actual cell behavior, however, is still difficult, as unexpected factors often remain for each specific case. It is thus important to have in-situ or operando tools to observe the behavior of cells, such as deformation and stress generation. For that purpose, laser profilometer and X-ray stress analyzer were employed with a specially designed cell holder. Methods for evaluating local current density was also proposed. Currently, we are developing a protocol for testing robustness of planar SOFCs. Severe condition tests will be performed, and the results will be analyzed with the above-mentioned simulation. © The Electrochemical Society.

关键词： Solid oxide fuel cells (SOFC)

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Nano-Engineered Ga-Doped Llzo Electrolytes: A Leap Toward High-Performance Solid-State Batteries

SSRN

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SSRN 2023年

作者： Jo, Seong-Jun Jeon, Young-Gue Hwang, Sang-Yeop Lim, Sung-Hwan Kumar, Ramachandran Vasant Kim, Kwang-Bum Kim, Hyun-Kyung Department of Battery Convergence Engineering Kangwon National University 1 Kangwondaehak-gil Chuncheon24341 Korea Republic of Interdisciplinary Program in Advanced Functional Materials and Devices Development Kangwon National University Chuncheon24341 Korea Republic of Department of Materials Science and Metallurgy University of Cambridge 27 Charles Babbage Road CambridgeCB3 0FS United Kingdom Department of Materials Science and Engineering Yonsei University 134 Shinchon-dong Seodaemoon-gu Seoul120-749 Korea Republic of

Garnet-type Li7La3Zr2O12 (LLZO) Li-ion solid electrolytes are promising candidates for the next generation of safe solid-state batteries. However, the lack of a methodology to control the ceramic powder particle size for obtaining and densifying fast-ion-conducting cubic garnet hinders the application of the Li7La3Zr2O12 as a Li+ ion solid electrolyte. In this study, the doping concentration of Ga, calcination temperature of the Ga-doped LLZO (Ga-LLZO) precursor for achieving nanostructured powders, and the evolution of grain size during sintering conditions are explored to determine the optimum parameters to prepare highly conductive ceramics using the microwave-assisted solvothermal method. The nanostructured precursor (−3 S cm−1) that be employed as a solid electrolyte in a lithium-ion battery. The above approach opens up a new synthesis avenue for making doped Li7La3Zr2O12-type materials with improved properties for energy storage applications. © 2023, The Authors. All rights reserved.

关键词： Solid electrolytes

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Acid-labile chemical bonds-based nanoparticles for endosome escape and intracellular delivery

Biomedical Technology

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Biomedical Technology 2023年 3卷 52-58页

作者： Ruoyu Cheng Shiqi Wang Hélder A. Santos Department of Biomedical Engineering University Medical Center Groningen University of Groningen 9713 AV Groningen the Netherlands W.J. Kolff Institute for Biomedical Engineering and Materials Science University Medical Center Groningen University of Groningen 9713 AV Groningen the Netherlands Drug Research Program Division of Pharmaceutical Chemistry and Technology Faculty of Pharmacy University of Helsinki FI-00014 Helsinki Finland

In the last years there has been a booming in the development of biological pharmaceuticals, and various nanoparticle delivery systems have been developed to overcome biological barriers to maximize the therapeutic potentials. Especially, when these drug-loaded nanoparticle systems arrive at the target cells, they must be successfully internalized into the cells, followed by the endosome escape, to release the payload in the cytoplasm. This is crucial so that the payloads are not degraded in the endosome (around pH 6.8–6.0) or lysosome (around pH 4.5). Considering the acid environment of the endosome, several studies have shown the design of different acid-labile nanoparticle delivery systems attempting to achieve endosome escape by, for example, endosomal rupture, membrane destabilization, and membrane fusion. In this mini-review, we summarize current designs in acid-labile chemical bonds for endosome escape of nanosystems. First, we briefly introduce the structural design of acid-labile nanoparticles and their endosomal escape mechanisms. Then, we review recent research work on the topic, highlighting how the nanoparticle designs can be used in endosome escape for different biomedical applications. Finally, we discuss the challenges and future perspectives in this field.

关键词： Intracellular delivery pH-responsive Acid-labile Nanoparticle Endosomal escape

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Strain-induced cesium bismuth bromide perovskite/bismuth oxide bromide composite with enhanced optical properties

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materials Today: Proceedings 2022年 60卷 1068-1073页

作者： Low, Yiin Jian Liew, Josephine Ying Chyi Talib, Zainal Abidin Lim, Hong Ngee Ahmad Kamarudin, Mazliana Lim, Kean Pah Lee, Han Kee Noor, Ikhwan Syafiq Mohd Salisu, Bashir Department of Physics Faculty of Science Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia Materials Synthesis and Characterization Laboratory Institute of Advanced Technology Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia Department of Physics College of Natural Sciences Jeonbuk National University 567 Baekje-daero Deokjin-gu Jeonju-siJeollabuk-do54896 Korea Republic of Department of Chemistry Faculty of Science Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia Functional Device Laboratory Institute of Advanced Technology Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia Department of Electronic Engineering Faculty of Engineering and Green Technology Universiti Tunku Abdul Rahman Kampar Campus Perak Kampar31900 Malaysia Physics Division Centre of Foundation Studies for Agricultural Science Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia

Perovskite halides are well suited for optoelectronic applications because of their excellent optical properties. Among them, cesium bismuth bromide (Cs3Bi2Br9) has emerged as a promising lead-free optical material to replace lead-based perovskite halides. This can be achieved by introducing a hydrated perovskite passivation layer, BiOBr. However, previous work was solely limited to bismuth oxide bromide (BiOBr) passivation on the Cs3Bi2Br9 surface layer and did not address composite synthesis from two different phases. Herein, we report the discovery and characterization of Cs3Bi2Br9/BiOBr composite via a pre-precipitation method using isopropanol (IPA) and hydrous ethanol (EtOH). Williamson-Hall plot analysis of the X-ray diffraction (XRD) results showed the successful formation of a Cs3Bi2Br9/BiOBr composite with an induced-strain effect when EtOH was introduced. The ultraviolet–visible (UV–Vis) and photoluminescence (PL) spectra showed that the absorption and emission peaks of Cs3Bi2Br9 were located at 340 nm and 410 nm, respectively. A redshift in the absorption onset and energy bandgap generates a 190% increase in PL emission for the EtOH-synthesized perovskite sample. The enhancement is correlated to the induced effect in the Cs3Bi2Br9 phase, where BiOBr could act as an agent to improve the optical properties of Cs3Bi2Br9 by inducing strains other than the surface passivation layer. © 2022

关键词： Strain

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Mediation of Interfacial Mo2C Bridging Effect in MoS2@Carbon Colloid Dots Featuring Improved Photovoltaic Performances of Si-Based Hybrid Solar Cells

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Advanced materials Technologies 2024年第12期9卷

作者： Wei, Ta-Cheng Chen, Shih-Hsiu Lin, Kuan-Han Wu, Tsung-Yen Hsiao, Po-Hsuan Chen, Chia-Yun Department of Materials Science and Engineering National Cheng-Kung University Tainan701 Taiwan Program on Semiconductor Packaging and Testing Academy of Innovative Semiconductor and Sustainable Manufacturing National Cheng Kung University Tainan70101 Taiwan Research Center National Cheng Kung University No.1 University Road Tainan701 Taiwan

Advances in silicon-based hybrid solar cells with high photovoltaic performance, low synthetic cost, and sound environmental resistance are emerged as potential candidate for solar conversion. Solution-processed few-layer MoS2 sheets are regarded as compelling constitutes that paves ways for tailoring the solar harvesting capability;yet the improvement on charge separation of photoexcited carriers remains demanded, and the lack of environmental stability due to intentionally grabbing electrons from adsorbed moistures constrains the scope of practical assessment. In this work, the employment of MoS2/Mo2C/carbon colloid dots (CCDs) heterostructures within PEDOT:PSS matrix is invoked, where the transfer of photoexcited electrons from MoS2 is mediated with Mo2C electron-transport channels, which further couple out the creation of positive trions by combining with defect-bound excitons at CCD surfaces. These features dynamically involve with slow recombination probability and further improve the photovoltaic gain. Thus, the noticeable improvement of conversion efficiency of 16.1% with 1.6 times of efficiency enhancement outperforming the bare conventional hybrid solar cells is accomplished, and further exhibits a sound long-term stability, which opens new avenues for exploiting the photophysical bound-carrier transition on advanced photovoltaic applications. © 2024 Wiley-VCH GmbH.

关键词： Molybdenum compounds

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Efficiency Boost of (Ag0.5,Cu0.5)(In1-x,Gax)Se2 Thin Film Solar Cells by Using a Sequential Process: Effects of Ag-Front Grading and Surface Phase engineering

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Advanced Energy materials 2023年第29期13卷

作者： Tu, Lung-Hsin Tran, Ngoc Thanh Thuy Lin, Shih-Kang Lai, Chih-Huang Department of Materials Science and Engineering National Tsing Hua University 101 Sec. 2 Kuang-Fu Road Hsinchu30013 Taiwan Research Center National Cheng Kung University Tainan70101 Taiwan Department of Materials Science and Engineering National Cheng Kung University Tainan70101 Taiwan Program on Smart and Sustainable Manufacturing Academy of Innovative Semiconductor and Sustainable Manufacturing National Cheng Kung University Tainan70101 Taiwan

Post-selenization-fabricated (using elemental Se vapor) Cu(In,Ga)Se2 solar cell efficiency is limited by a low open-circuit voltage, which is attributable to the Ga-deficient surface and insufficient grain growth. In this study, a band-grading structure is demonstrated by combining Ag-front and Ga-back grading in selenized (Ag,Cu)(In,Ga)Se2 (ACIGSe) absorbers with a properly designed precursor structure (Mo/CuGa/In/AgGa) and high Ag content ([Ag]/([Ag]+[Cu]) = 0.5). The phase evolution during post-selenization reveals that the precursor structure suppresses Ag2Se formation and promotes the ACIGSe phase formed at a low temperature with enhanced grain growth. A widened surface bandgap by Ag-front grading substantially increases the open-circuit voltage. Furthermore, Ag addition promotes ordered vacancy compound (OVC) formation on the front surface to enlarge the valence band offset, which in turn reduces interface recombination. Furthermore, the OVC phase also assists interface passivation. Promoting surface OVC phase by Ag addition is also validated by first-principles calculations. Furthermore, the K-doped CuGa precursor is used for a ACIGSe absorber to address the significantly reduced carrier density by the Ag addition. With a band-grading structure and surface OVC phase, the superior device achieves an efficiency of > 19%, the highest efficiency by post-selenization with an elemental Se source. © 2023 Wiley-VCH GmbH.

关键词： Grading

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Universal whirling magnetic orders in non-Heisenberg Tsai-type quasicrystal approximants

arXiv

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arXiv 2025年

作者： Labib, Farid Nawa, Kazuhiro Nambu, Yusuke Takakura, Hiroyuki Ikeda, Yoichi Deguchi, Kazuhiko Matsuura, Masato Ishikawa, Asuka Kajimoto, Ryoichi Ikeuchi, Kazuhiko Sato, Taku J. Tamura, Ryuji Research Institute of Science and Technology Tokyo University of Science Tokyo125-8585 Japan Tohoku University Sendai980-8577 Japan Institute for Materials Research Tohoku University Miyagi Sendai980-8577 Japan Organization for Advanced Studies Tohoku University Miyagi Sendai980-8577 Japan FOREST Japan Science and Technology Agency Saitama Kawaguchi332-0012 Japan Division of Applied Physics Faculty of Engineering Hokkaido University Sapporo060-8628 Japan Department of Physics Graduate School of Science Nagoya University Nagoya464-8602 Japan Ibaraki Tokai319-1106 Japan Materials and Life Science Division J-PARC Center Japan Atomic Energy Agency Ibaraki Tokai319-1195 Japan 319-1106 Japan Department of Materials Science and Technology Tokyo University of Science Tokyo125-8585 Japan

Magnetic orders of non-Heisenberg Tsai-type 1/1 approximant crystals (ACs) in the Au-Ga-Dy system were studied through bulk magnetization, neutron diffraction, and inelastic neutron scattering techniques. The results uncovered noncoplanar, ferromagnetic (FM) and antiferromagnetic (AFM) spin configurations whirling along [111] crystallographic axis, which is analogous to those observed in the Tb- and Ho-contained counterparts. The crystal electric field excitations similar to those in the Tb-based counterpart are also observed indicating the strong Ising-like magnetic anisotropy. These comprehensive experiments and analyses have revealed the existence of a universal mechanism that stabilizes noncoplanar FM and AFM structures in non-Heisenberg Tsai-type ACs, independent of the rare-earth species (Tb, Dy, Ho);FM intra-cluster interactions and strong Ising-like anisotropy. Copyright © 2025, The Authors. All rights reserved.

关键词： Magnetic anisotropy

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Modelling and Application of Jutes Fiber Reinforced Epoxy Composite in the Development of Wind Blade for Low Intensity Winds

SSRN

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SSRN 2023年

作者： Junio, Raí Felipe Pereira Cardoso, Robson Luis B. Ramos, Roberto Paulo B. Leão Filha, Elza M. Ribeiro, Mauricio M. Candido, Verônica S. Rodrigues, Jean da S. Silva, Douglas Santos Monteiro, Sergio N. Fujiyama, Roberto T. Federal University of Pará—UFPA Engineering of Natural Resources of the Amazon Program Rua Augusto Corrêa 01 PA BelémCEP 66075-110 Brazil Federal Institute of Education Science and Technology of Pará – IFPA Materials Engineering Program Avenida Almirante Barroso 1155 Marco PA BelémCEP 66093-020 Brazil Federal University of Pará - UFPA Postgraduate Program in Industrial Engineering Rua Augusto Corrêa 01 PA BelémCEP 66075-110 Brazil Federal Institute of Education Science and Technology of Pará – IFPA Estrada do Icuí Guajará PA AnanindeuaCEP 67125-000 Brazil Military Institute of Engineering – IME Department of Materials Science Praça General Tibúrcio 80 Praia Vermelha Urca RJ Rio de JaneiroCEP 22290-270 Brazil

Natural fibres show an increasing potential as reinforcement of polymeric composites, representing a promising concurrent to glass and carbon fibres extensively used in the construction of wind turbine blades synthetic fibres recyclability/disposability and high production energy cost have already been discussed in the main turbine producing centres. In particular, the development of wind turbines for low wind speed areas can increase the energy generation potential of regions not originally eligible for the installation of large turbines. This study proposes the evaluation of the use of jute fibre (Corchorus capsularis) reinforced epoxy composite in the construction of S1210 airfoil profile, of a small-scale wind turbine for low wind speed regions, considering the structural parameters, developed incorporating the Classical Laminate Theory (CLT) and Extended Bredt-Batho Shear Flow Theory (EBSFT).In order to raise the elastic properties and enable the use of the failure criteria, the composite blades were characterized according to ASTM standards. The mechanical properties surveyed, together with the elastic parameters of the cross section, torsional stiffness, axial stiffness and flexural rigidity, demonstrated the feasibility of using the jute fiber reinforced epoxy composite in the blade construction, evaluated according to the maximum tension failure criterion. © 2023, The Authors. All rights reserved.

关键词： Laminated composites

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Corrigendum to “Amorphous boron carbide from ab initio simulations” [Comput. Mater. Sci. 173 (2020) 109397]

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Computational materials science 2023年 216卷

作者： Tevhide Ayça Yıldız Murat Durandurdu Materials Science & Mechanical Engineering Program and Department of Materials Science & Nanotechnology Engineering Abdullah Gül University Kayseri 38080 Turkey

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