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Multifunctional diamond-based catalysts:Promising candidates for energy conversions in extreme environments-A mini-review

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Electron 2024年第3期2卷 70-84页

作者： Ziwei Zhao Xiaowu Gao Hansong Zhang Keran Jiao Pengfei Song Yumin Zhang Yongjie Wang Jiaqi Zhu Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive ApplicationHarbin Institute of TechnologyShenzhenChina National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbinChina Department of Chemical Engineering The University of ManchesterManchesterUK School of Advanced Technology Xi'an Jiaotong-Liverpool UniversitySuzhouChina Zhengzhou Research Institute Harbin Institute of TechnologyZhengzhouChina

In order to properly utilize the abundant CO_(2)and water resources,various catalytic materials have been developed to convert them into valuable chemicals as renewable fuels electrochemically or ***,most studies are conducted under mild laboratory conditions,but for some extreme environments,such as Mars and space stations,there is an urgent need to develop new catalysts satisfying such special *** catalytic materials mainly focus on metals and narrow bandgap semiconductor materials,while the research on wide and ultrawide bandgap materials that can inherently withstand extreme conditions has not received enough *** the robust stability and excellent physico-chemical properties of diamond,it can be expected to perform in harsh environments for electrocatalysis or photocatalysis that has not been investigated ***,this review summarizes the catalytic functionality of diamond-based electrodes with various but tunable product selectivity to obtain the varied C_(1)or C_(2+)products,and discusses some important factors playing a key role in manipulating the catalytic ***,the unique solvation electron effect of diamond gives it a significant advantage in photocatalytic conversions which is also summarized in this *** the end,prospects are made for the application of diamond-based catalysts under various extreme *** challenges that may be faced in practical applications are also summarized and future breakthrough directions are proposed at the end.

关键词： CO_(2)catalytic reduction diamond extreme environment functionality renewable energy

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Microstructural regulation,oxidation resistance,and mechanical properties of C_(f)/SiC/SiHfBOC composites prepared by chemical vapor infiltration with precursor infiltration pyrolysis

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Journal of advanced Ceramics 2022年第1期11卷 120-135页

作者： Yang LYU Baihe DU Guiqing CHEN Guangdong ZHAO Yuan CHENG Shanbao ZHOU Qingrong LV Xinghong ZHANG Wenbo HAN National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080China School of Chemistry and Materials Science Heilongjiang UniversityHarbin 150080China School of Physics and Material Science Anhui UniversityHefei 230601China

To further improve the oxidation resistance of polymer derived ceramic(PDC)composites in harsh environments,Cf/SiC/SiHfBOC composites were prepared by chemical vapor infiltration(CVI)and precursor impregnation pyrolysis(PIP)*** weight retention change,mechanical properties,and microstructure of C/SiC/SiHfBOC before and after oxidation in air were studied in *** analyses showed that only the interface between the ceramics and fibers was oxidized to some extent,and hafnium had been enriched on the composite surface after oxidizing at different *** main oxidation products of Cf/SiC/SiHfBOC composites were Hf0_(2)and HfSi04 after oxidation at 1500℃for 60 ***,the weight retention ratio and compressive strength of the Cf/SiC/SiHfBOC composites are 83.97%and 23.88±3.11 MPa,*** indicates that the Cf/SiC/SiHfBOC composites should be promising to be used for a short time in the oxidation environment at 1500℃.

关键词： Cf/SiC/SiHfBOC composites precursor infiltration pyrolysis(PIP)method mechanical properties high-temperature oxidation resistance

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Modification strategies for non-aqueous, highly proton-conductive benzimidazole-based high-temperature proton exchange membranes

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Chinese Chemical Letters 2024年第4期35卷 43-51页

作者： Yunfa Dong Shijie Zhong Yuhui He Zhezhi Liu Shengyu Zhou Qun Li Yashuai Pang Haodong Xie Yuanpeng Ji Yuanpeng Liu Jiecai Han Weidong He National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080China School of Petroleum Engineering Chongqing University of Science and TechnologyChongqing 401331China School of Physics University of Electronic Science and Technology of ChinaChengdu 610054China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China Chongqing Research Institute Harbin Institute of TechnologyChongqing 401151China School of Mechanical Engineering Chengdu UniversityChengdu 610106China

High-temperature proton exchange membranes(HT-PEMs) possess excellent thermal and outstanding electrochemical stability, providing an avenue to realize high-temperature proton exchange membranes fuel cells(HT-PEMFCs) with both superior power density and long-term durability. Unfortunately, polybenzimidazole(PBI), a typical material for conventional HT-PEMs, fails to compromise the high nonaqueous proton conductivity and high mechanical properties, thus hindering their practical *** efficient nonaqueous proton conduction is crucial for HT-PEMFC, and many insightful research works have been done in this area. However, there still lacks a report that integrates the host-guest interactions of phosphoric acid doping and the structural stability of polymers to systematically illustrate modification strategies. Here, we summarize recent advancements in enhancing the nonaqueous proton conduction of HT-PEMs. Various polymer structure modification strategies, including main chain and side group modification, cross-linking, blocking, and branching, are reviewed. Composite approaches of polymer, including compounding with organic porous polymers, filling the inorganic components and modifying with ionic liquids, etc., are also covered in this work. These strategies endow the HT-PEMs with more free volume, nanophase-separated structure, and multi-stage proton transfer channels, which can facilitate the proton transportation and improve their performance. Finally, current challenges and future directions for further enhancements are also outlined.

关键词： Benzimidazole Nonaqueous proton conduction Free volume Nanophase-separated structure Structure modification

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Theoretical screening,intrinsic brittleness and thermal properties of the S-containing MAX carbides and borides

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Journal of Materiomics 2023年第6期9卷 1056-1066页

作者： Zhiyao Lu Xiaodong He Hang Yin Jinze Zhang Guangping Song Yongting Zheng Yuelei Bai National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structure Harbin Institute of TechnologyHarbin150080China

To respond the recent experimental advances,the phase stability,mechanical properties,phonon as well as infrared-and Raman-active modes,thermal expansion and heat capacity were investigated by density functional theory for the S-containing MAX carbides and borides(M fromⅢB toⅧB),of importance,well consistent with the available experimental *** examining the thermodynamic competition with all the competing phases and intrinsic stability by their lattice dynamics,18 MAX phases were screened out from 138 *** the“bond stiffness”model as well as the associated criterion for damage tolerance and fracture toughness,the ratio of bond stiffness of weakest M-S to the strongest MX bonds(k_(min)/k_(max))over 1/2 indicates their intrinsic brittleness of all S-containing MAX phases except *** the contributions from phonon and electrons,their linear thermal expansion coefficients[(8.1e13.6)×10^(-6)K^(-1),300-1,300 K]and heat capacities(Cp)as a function of temperature are *** much interest,a well-established relationship between molar C_(p)of the MAX and MX phases is theoretically deduced in the present work.

关键词： Phase stability Intrinsic brittleness Thermal expansion Heat capacity

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DFT-assisting discovery and characterization of a hexagonal MABphase V_(3)PB_(4)

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Journal of Materiomics 2023年第6期9卷 1141-1150页

作者： Hang Yin Xiaodong He Jinze Zhang Guangping Song Yongting Zheng Yuelei Bai National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structures Harbin Institute of TechnologyHarbin150080China

A 314-type MAB phase V_(3)PB_(4)with hexagonal crystal structure is synthesized by self-propagating high temperature combustion synthesis(SHS),with the help of the full first-principles predictions for the phase stability and adiabatic combustion temperature of *** XRD and TEM,V_(3)PB_(4)crystallizes in the space group of P6m2,with the lattice parameters a?3.030Åand c=9.148Å,of much interest,well with the predicted ***,the electronic structure,chemical bonding,and elastic properties of hex-V_(3)PB_(4)are predicted by *** bandgap around Fermi energy indicates its electronic *** the strong covalent bonding is present between the B and V atoms with,significantly,much weaker V-P *** the help of the theoretical model of bond stiffness,the significantly high ratio of bond stiffness of weakest bonds to the strongest ones(0.873)of hex-V_(3)PB_(4)indicates its poor damage tolerance and fracture *** high bond stiffness results in its high moduli in comparison with other MAB *** the number of inserted P atoms increases,the engineering elastic modulus decrease,without the price of an increase in density.

关键词： MAB phase Borides Hexagonal First principles Combustion synthesis

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A reconfigurable dynamic Bayesian network for digital twin modeling of structures with multiple damage modes

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Theoretical & Applied Mechanics Letters 2023年第4期13卷 251-260页

作者： Yumei Ye Qiang Yang Jingang Zhang Songhe Meng Jun Wang Xia Tang School of Mechanical Technology Wuxi Institute of TechnologyWuxi 214121China National Key Laboratory of Science and Technology for National Defence on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150001China Beijing Institute of Astronautical Systems Engineering Beijing 100076China

Dynamic Bayesian networks(DBNs)are commonly employed for structural digital twin *** present,most researches only consider single damage mode *** is not sufficient for a reusable spacecraft as various damage modes may occur during its service life.A reconfigurable DBN method is proposed in this *** structure of the DBN can be updated dynamically to describe the interactions between different *** common damages(fatigue and bolt loosening)for a spacecraft structure are considered in a numerical *** results show that the reconfigurable DBN can accurately predict the acceleration phenomenon of crack growth caused by bolt loosening while the DBN with time-invariant structure cannot,even with enough *** definition of interaction coefficients makes the reconfigurable DBN easy to track multiple damages and be extended to more complex *** method also has a good physical interpretability as the reconfiguration of DBN corresponds to a specific *** predictions do not require precise knowledge of reconfiguration conditions,making the method more practical.

关键词： Dynamic Bayesian network Reusable spacecraft Damage Reconfiguration

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key materials for extreme high-temperature environments: Ultra-high-temperature ceramics and their composites

Extreme Materials

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Extreme Materials 2025年第1期1卷 38-66页

作者： Yuxuan Liu Hui Wang Jianchao Hao Yuan Cheng Shun Dong Ping Hu Wenbo Han Xinghong Zhang National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structures Harbin Institute of Technology Harbin 150001 China

With the advancement of hypersonic vehicles, extreme high temperature environments have imposed increasingly stringent requirements on the performance of thermal protection systems. Consequently, the development of high-performance thermal protection materials capable of withstanding extreme conditions has become a primary focus of current research. Ultra-high temperature ceramics (UHTCs) and their composites, known for their excellent oxidation resistance and ablation performance, are regarded as highly promising non-ablative thermal protection materials. This paper provides a systematic review of recent research progress on UHTC composites in several key areas, including innovations and optimizations in fabrication processes, exploration of toughening strategies and mechanisms, in-depth studies on oxidation and ablation resistance mechanisms, and the development and potential applications of high-entropy ceramics. Furthermore, the paper discusses the practical application prospects of UHTCs and their composites in extreme environments, analyzes the current technical challenges, and proposes future research directions and priorities.

关键词： Extreme environments materials Ultra-high temperature ceramics (UHTCs) Toughening and strengthening Oxidation and ablation Hypersonic vehicles

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Two-Dimensional Materials for Highly Efficient and Stable Perovskite Solar Cells

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Nano-Micro Letters 2024年第10期16卷 176-212页

作者： Xiangqian Shen Xuesong Lin Yong Peng Yiqiang Zhang Fei Long Qifeng Han Yanbo Wang Liyuan Han State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240People's Republic of China Xinjiang Key Laboratory of Solid State Physics and Devices School of Physical Science and TechnologyXinjiang UniversityUrumqi 830046People's Republic of China Special Division of Environmental and Energy Science College of Arts and SciencesKomaba Organization for Educational ExcellenceUniversity of TokyoTokyo 153-8902Japan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People's Republic of China College of Chemistry Henan Institute of Advanced TechnologyZhengzhou UniversityZhengzhou 450001People's Republic of China Guangxi Key Laboratory of Optical and Electronic Materials and Devices Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of ResourcesSchool of Materials Science and EngineeringGuilin University of TechnologyGuilin 541004People's Republic of China

Perovskite solar cells(PSCs)offer low costs and high power conversion ***,the lack of long-term stability,primarily stemming from the interfacial defects and the sus-ceptible metal electrodes,hinders their practical *** the past few years,two-dimensional(2D)materials(e.g.,graphene and its derivatives,transitional metal dichalcogenides,MXenes,and black phosphorus)have been identified as a promising solution to solving these problems because of their dangling bond-free surfaces,layer-dependent electronic band structures,tunable functional groups,and inherent ***,recent progress of 2D material toward efficient and stable PSCs is summarized,including its role as both interface materials and *** discuss their beneficial effects on perovskite growth,energy level alignment,defect passivation,as well as blocking external *** particular,the unique properties of 2D materials to form van der Waals heterojunction at the bottom interface are ***,perspectives on the further development of PSCs using 2D materials are provided,such as designing high-quality van der Waals heterojunction,enhancing the uniformity and coverage of 2D nanosheets,and developing new 2D materials-based electrodes.

关键词： Perovskite solar cells Two-dimensional materials Interface engineering Van der Waals heterojunction Electrodes

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A Fast Analysis Framework with Fragment Mapping Method for Simulating Debris Cloud Behavior Under Hypervelocity Impact

SSRN

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SSRN 2024年

作者： Cao, Xu Miao, Changqing Xu, Huadong Zhou, Jia National Key Laboratory of Science and Technology on Advanced Composites in Special Environment Harbin Institute of Technology Harbin150001 China Harbin Institute of Technology China

Smooth Particle Hydrodynamics (SPH) method encounters computational inefficiencies and boundary ambiguities, particularly simulating shielding structures with spatial span in the hypervelocity impact (HVI). In this work, a fast analysis framework is proposed with the fragment mapping method to simulate the debris cloud behavior in HVI events. The fragment mapping method is built to map the dynamic characteristics of each fragment, which is identified and separated individually from discrete SPH debris clouds according to the support domain characteristics of the SPH method and integrating the Density-Based Spatial Clustering of Applications with Noise (DBSCAN) algorithm. Based on the fragment mapping method, a fast analysis framework for debris cloud behavior is developed, including analysis of interactions between the debris cloud and the rear plate, as well as between the projectile and the bumper. Simulation results of the dual-wall Whipple structure demonstrate that this method aligns with experimental results, accurately simulating debris cloud behavior, while significantly enhancing computational efficiency. Compared to traditional SPH methods, the calculation speed is up to 86 times faster. Further, the results of fragmentation pattern analysis for a 6.35mm Al projectile impacting a 2mm Al plate indicate that the projectile’s ruptured limit velocity is 2.6km/s while its smashed limit velocity is 3.8km/s. The model developed in this paper can identify and analyze debris cloud quickly and efficiently, with high computational accuracy, and can be applied to the numerical simulation of spacecraft structure under HVI. © 2024, The Authors. All rights reserved.

关键词： Projectiles

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基于拉压转换和变刚度斜坡结构的宽量程压缩传感结构

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science China Materials 2024年第3期67卷 871-878页

作者：李朋阳熊金华闫倩丁仁杰郑皓文薛福华赵旭陈仲刘宗林唐志共彭庆宇赫晓东 National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin150080China Frontiers Science Center for Matter Behave in Space Environment Harbin Institute of TechnologyHarbin 150080China Shenzhen STRONG Advanced Materials Research Institute Co. Ltd.Shenzhen 518000China

压力传感器仍然面临着将高灵敏度与宽检测范围相结合的挑战.基于此,我们设计了一种拉-压转换(TC)结构,并将其与变刚度策略相结合来制造压力传感器件.该结构能够将二维可拉伸材料的传感性能转换为三维可压缩设备的传感性能.传感和机械性... 详细信息

压力传感器仍然面临着将高灵敏度与宽检测范围相结合的挑战.基于此,我们设计了一种拉-压转换(TC)结构,并将其与变刚度策略相结合来制造压力传感器件.该结构能够将二维可拉伸材料的传感性能转换为三维可压缩设备的传感性能.传感和机械性能可以使用模拟和理论计算进行设计.斜面结构能够在24.3 N范围内提供线性传感.变刚度设计策略使传感器能够以高灵敏度(3.5 N^(-1))感知较小载荷,并具有宽的检测范围(0.002–24.300 N,扩展范围82.6 N).此外,该传感结构可以在水下环境中稳定工作.这种使用二维可拉伸应变传感器作为传感单元来开发压缩传感装置的设计策略将为未来提供新的思路.

关键词： nanocomposites strain-sensing film pressure sensor 3D printing variable stiffness structures

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