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Se-Ni Se_(2) hybrid nanosheet arrays with self-regulated elemental Se for efficient alkaline water splitting

Journal of Materials Science & Technology 2022年第23期118卷 145-152页

作者： Xiang Peng Yujiao Yan shijian xiong Yaping Miao Jing Wen Zhitian Liu Biao Gao Liangsheng Hu Paul K.Chu Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Hubei Engineering Technology Research Center of Optoelectronic and New Energy MaterialsWuhan Institute of TechnologyWuhan 430205China Department of Physics Department of Materials Science and EngineeringDepartment of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina School of Textile Science and Engineering Xi’an Polytechnic UniversityXi’an 710048China State Key Laboratory of Refractories and Metallurgy Institute of Advanced Materials and NanotechnologyWuhan University of Science and TechnologyWuhan 430081China Department of Chemistry Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong ProvinceShantou UniversityShantou 515063China

Understanding the catalytic mechanism of non-noble transition metal electrocatalysts is crucial to designing high-efficiency,low-cost,and durable alternative electrocatalysts for water splitting which comprises the hydrogen evolution reaction(HER) and oxygen evolution reaction(OER).In this work,Se-NiSe_(2) hybrid nanosheets with a self-regulated ratio of ionic Se(I-Se) to elemental Se(E-Se) are designed on carbon cloth by solution synthesis and hydrothermal *** effects of the I-Se/E-Se ratios on the electrocatalytic characteristics in HER and OER are investigated systematically both experimentally and *** optimized bifunctional electrocatalyst needs overpotentials of only 133 mV to deliver an HER current density of 10 mA cm^(-2) and 350 mV to generate an OER current density of 100 mA cm^(-2) in1.0 mol L^(-1) *** on the density-functional theory calculation,surface-adsorbed E-Se is beneficial to optimizing the electron environment and the adsorption/desorption free energy of hydrogen/water of the hybrid catalyst,consequently facilitating the electrocatalytic water splitting *** is a proper I-Se/E-Se ratio to improve the catalytic activity and kinetics of the reaction and the optimized E-Se adsorption amount can balance the interactions between I-Se and E-Se,so that the catalyst can achieve appropriate Se-H binding and active site exposure for the excellent electrocatalytic *** demonstrate the practicality,the assembled symmetrical device can be powered by an AA battery to produce hydrogen and oxygen *** results provide a deeper understanding of the catalytic mechanism of transition metal selenides in water splitting and insights into the design of high-efficiency and low-cost electrocatalysts in energy-related applications.

关键词： Nickel selenide Self-regulation Bifunctional electrocatalysst Water splitting Alkaline hydrogen evolution reaction

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Ultralow-voltage hydrogen production and simultaneous Rhodamine B beneficiation in neutral wastewater

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Journal of Energy Chemistry 2023年第6期81卷 574-582,I0013页

作者： Xiang Peng Song Xie shijian xiong Rong Li Peng Wang Xuming Zhang Zhitian Liu Liangsheng Hu Biao Gao Peter Kelly Paul K.Chu Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Hubei Engineering Technology Research Center of Optoelectronic and New Energy MaterialsSchool of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205HubeiChina Department of Physics Department of Materials Science and EngineeringDepartment of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloon 999077Hong KongChina State Key Laboratory of Refractories and Metallurgy and Institute of Advanced Materials and Nanotechnology Wuhan University of Science and TechnologyWuhan 430081HubeiChina Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou UniversityShantou 515063GuangdongChina Surface Engineering Group Manchester Metropolitan UniversityManchester M15GDUK

Electrocatalytic water splitting for hydrogen production is hampered by the sluggish oxygen evolution reaction(OER)and large power consumption and replacing the OER with thermodynamically favourable reactions can improve the energy conversion *** iron corrodes easily and even self-corrodes to form magnetic iron oxide species and generate corrosion currents,a novel strategy to integrate the hydrogen evolution reaction(HER)with waste Fe upgrading reaction(FUR)is proposed and demonstrated for energy-efficient hydrogen production in neutral *** heterostructured MoSe_(2)/MoO_(2) grown on carbon cloth(MSM/CC)shows superior HER performance to that of commercial Pt/C at high current *** replacing conventional OER with FUR,the potential required to afford the anodic current density of 10 m A cm^(-2)decreases by 95%.The HER/FUR overall reaction shows an ultralow voltage of 0.68 V for 10 m A cm^(-2)with a power equivalent of 2.69 k Wh per m^(3)H_(2).Additionally,the Fe species formed at the anode extract the Rhodamine B(Rh B)pollutant by flocculation and also produce nanosized magnetic powder and beneficiated Rh B for value-adding *** work demonstrates both energy-saving hydrogen production and pollutant recycling without carbon emission by a single system and reveals a new direction to integrate hydrogen production with environmental recovery to achieve carbon neutrality.

关键词： Energy-saving hydrogen production Hydrogen evolution reaction Neutral water splitting MoSe_(2)/MoO_(2)heterostructure Environmental recovery

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钒酸钴纳米片的析氧性能研究

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稀有金属 2022年第6期46卷 839-845页

作者：刘淖泽熊时健彭祥武汉工程大学材料科学与工程学院湖北省等离子体化学与新材料重点实验室湖北省光电与新能源材料工程技术研究中心湖北武汉430205

析氧反应(OER)是电解水制氢过程中的决速步,因此构建高效、低成本的非贵金属基OER电催化剂是实现氢能源高效制取的关键。通过两步水热法将Co元素引入到V_(2)O_(5)中,从而制备出了钒酸钴(Co_(3)V_(2)O_(8))纳米片结构,Co元素的引入使纳... 详细信息

析氧反应(OER)是电解水制氢过程中的决速步,因此构建高效、低成本的非贵金属基OER电催化剂是实现氢能源高效制取的关键。通过两步水热法将Co元素引入到V_(2)O_(5)中,从而制备出了钒酸钴(Co_(3)V_(2)O_(8))纳米片结构,Co元素的引入使纳米片暴露更多的活性位点,并提高导电性加快了电荷传输,因而可提高其OER性能。形貌和成分表征结果显示所制备的催化剂为正交晶系的Co_(3)V_(2)O_(8)纳米片结构。对该催化剂进行系统的OER性能研究,结果表明,Co_(3)V_(2)O_(8)催化剂产生10 mA·cm^(-2)的析氧电流密度需要364 mV的过电位,产生100 mA·cm^(-2)的析氧电流需要过电位仅为540 mV,对应的Tafel斜率为62 mV·dec^(-1),此外,在经历1000次循环测试后,该催化剂极化曲线不发生明显变化,即仍能保持较好的性能,证实了该催化剂优异的稳定性。对经过循环测试之后的样品进行形貌和成分表征,结果表明催化剂纳米片形貌能较好保持,但是结晶度降低。理论计算结果表明,将Co元素引入到V_(2)O_(5)中可提高费米能级处的电子态密度,从而增强其OER性能。

关键词：电解水析氧反应(OER) 钒酸钴纳米片多元金属化合物

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新型热镀锌双相钢的合金成分对界面层和镀层结构的影响

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材料研究学报 2024年第6期38卷 446-452页

作者：李沅沅梁健熊自柳苗斌田秀刚齐建军郑士建河北工业大学材料科学与工程学院天津300401 河钢材料技术研究院石家庄050023 唐山钢铁集团有限责任公司技术中心唐山063000 河钢股份有限公司石家庄050023

用对粘方式制备热镀锌双相钢DP980样品,用TEM表征其截面,用TEM结合电子衍射和EDS表征其界面层结构和镀锌层结构并构建其空间关系。结果表明,与DP780在退火阶段合金元素Mn的外氧化不同,DP980主要发生内氧化和Cr元素与Mn元素的竞争性氧化... 详细信息

用对粘方式制备热镀锌双相钢DP980样品,用TEM表征其截面,用TEM结合电子衍射和EDS表征其界面层结构和镀锌层结构并构建其空间关系。结果表明,与DP780在退火阶段合金元素Mn的外氧化不同,DP980主要发生内氧化和Cr元素与Mn元素的竞争性氧化,界面层中较少的MnO促进热镀锌过程中的Fe-Al反应而生成了连续致密的Fe_(2)Al_(5)抑制层,抑制了镀锌阶段的Fe-Zn反应而使DP980具有较好的热镀锌性能。同时,这种结构使弥散分布在镀锌层中的η-Zn基体生成Fe3Zn10纳米晶而避免生成有较大脆性Fe-Zn相的镀层结构,使DP980保持较好的力学性能。

关键词：材料表面与界面镀锌双相钢微观结构表征选择性氧化界面层结构镀锌层结构

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某车用发动机进排气道流场仿真分析

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汽车实用技术 2024年第17期49卷 78-82页

作者：周欢熊思琴肖尧苏仕见重庆水利电力职业技术学院智能制造学院重庆402160

某车用发动机原气道由于结构较为简单,且在气道的进口段和出口段的交接处没有圆滑过渡,截面收缩较大,导致气体流量损失增加。现对发动机特征参数进行分析调整,从而提高发动机功率,降低发动机油耗。文章对原始进排气道模型进行了初步改型... 详细信息

某车用发动机原气道由于结构较为简单,且在气道的进口段和出口段的交接处没有圆滑过渡,截面收缩较大,导致气体流量损失增加。现对发动机特征参数进行分析调整,从而提高发动机功率,降低发动机油耗。文章对原始进排气道模型进行了初步改型,将进排气门导管所在凸台均抬高2mm之后的进排气道与原机进排气道在流场的仿真结果上差异并不大,进气道流量仅提高1%左右,排气道流量的提升效果要稍好一些,所以,要想对充气效率和发动机性能有大幅度的提升,须从气道的整体几何结构着手进行改进。因此,文章对进气道结构重新设计了三个方案,从计算结果来看,各方案进气流量都有明显的提升,可支撑发动机动力的提升。通过文章的分析研究可以减少石油的消耗,提高车用发动机燃烧效率。

关键词：发动机进排气道流量仿真分析

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Atomic scale structure dominated FCC and B2 responses to He ion irradiation in eutectic high-entropy alloy AlCoCrFeNi_(2.1)

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Journal of Materials Science & Technology 2022年第34期129卷 87-95页

作者： Jingyu Pang Ting xiong Wenfan Yang Hualong Ge Xiaodong Zheng Miao Song Hongwei Zhang shijian Zheng Institute of Metal Research Chinese Academy of Sciences7Shenyang 110016China School of Material Science and Engineering University of Science and Technology of ChinaShenyang 110016China Ji Hua Laboratory Foshan 528251China School of Nuclear Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of TechnologyTianjin 300130China

Radiation-tolerant materials are widely desired in nuclear reactors. High-entropy alloys(HEAs) exhibiting superior mechanical performance and swelling tolerance are being considered as next-generation nuclear structural materials. However, an understanding of HEAs irradiation tolerance at an atomic scale is still lacking. In this study, the atomic scale irradiation response of AlCoCrFeNi_(2.1), composed of face-centered cubic(FCC) phase and B2 phase, has been systematically investigated at 298 and 723 K. The bubble volume ratio of the B2 phase is much larger than that of the FCC phase under the same irradiation conditions, and hence, the FCC phase has superior swelling tolerance than the B2 phase. Also, order-disorder transformation occurred in both L12and B2 phases. The different irradiation responses between the FCC and B2 phases, depend firstly on composition and secondly on crystal structure. The higher compositional complexity and complicated atomic-level lattice environment of the FCC phase contribute to better radiation performance than B2 phase. The results pave a way for exploring radiation-tolerant structural high-entropy alloys.

关键词： High-entropy alloy AlCoCrFeNi_(2.1) He ion irradiation Radiation tolerance Electron microscopy

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热处理工艺对热镀锌热成形22MnB5钢锌层组织结构与表面氧化物的影响

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金属热处理 2024年第8期49卷 275-280页

作者：赵景轩梁健张玲玲范龙龙熊自柳沈春光苗斌郑士建河北工业大学材料科学与工程学院天津300401 河钢材料技术研究院河北石家庄050023

用扫描电镜(SEM)及能谱仪(EDS)等方法系统表征了22MnB5热成形钢在不同奥氏体化温度和保温时间下镀锌层的微观形貌与表层氧化物分布。结果表明,奥氏体化温度超过850℃后,镀锌层的厚度增加,发生由纯Zn相向α-Fe(Zn)的组织转变,且与基体之... 详细信息

用扫描电镜(SEM)及能谱仪(EDS)等方法系统表征了22MnB5热成形钢在不同奥氏体化温度和保温时间下镀锌层的微观形貌与表层氧化物分布。结果表明,奥氏体化温度超过850℃后,镀锌层的厚度增加,发生由纯Zn相向α-Fe(Zn)的组织转变,且与基体之间界面模糊。奥氏体化温度由850℃升高至900℃时,锌层厚度随奥氏体化温度的升高而增加,氧化锌颗粒更加密集,彼此连接团聚;当奥氏体化温度提高到900℃以上,镀锌层中出现大尺寸的富Mn氧化物。奥氏体化时间由4 min延长至8 min时(奥氏体化温度920℃),表面氧化程度增加,氧化物尺寸增大且彼此连接成层,裸露出α-Fe(Zn)层,对锌层保护作用降低,致使氧元素扩散至锌层内部,形成富Mn氧化物。

关键词：热成形钢镀锌层奥氏体化氧化物结构

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High He-ion irradiation resistance of CrMnFeCoNi high-entropy alloy revealed by comparison study with Ni and 304SS

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Journal of Materials Science & Technology 2019年第3期35卷 300-305页

作者： Lixin Yang Hualong Ge Jian Zhang Ting xiong Qianqian Jin Yangtao Zhou Xiaohong Shao Bo Zhang Zhengwang Zhu shijian Zheng Xiuliang Ma Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences School of Material Science and Engineering University of Science and Technology of China School of Energy Research Xiamen University School of Material Science and Engineering Lanzhou University of Technology

High entropy alloys(HEAs) have presented potential applications in nuclear power plants owing to their novel atomic structure based high irradiation resistance. However, understanding of He-ion irradiation of HEAs is still lacking. In this work, we reveal He-ion irradiation resistance of HEA CrMnFeCoNi by comparison study with a pure Ni and a 304 stainless steel(304SS). It is found that the damage structure in the three materials can be characterized with He bubbles and stacking faults/stacking fault tetrahedrons((SFs/SFTs), which show a similar depth distribution after He-ion irradiation at both RT and 450℃.Although the He bubbles have a similar size about 2nm after irradiation at RT, the He bubble sizes of the HEA, 304SS, and Ni increase to 4.0±0.9,5.3±1.0 and 6.7 ±1.0 nm after irradiation at 450℃, respectively. Moreover, the density of SFs/SFTs displays in an order of Ni < 304 SS < HEA at both RT and 450℃.The He-ion irradiation at RT causes significant hardness enhancement for the three materials, however,compared to RT, after irradiation at 450℃, the Ni presents softening, while the 304SS, especially the HEA,shows further hardening. Thus, the HEA CrMnFeCoNi possesses the smallest He bubble size, the densest SFs/SFTs, and the highest hardening, indicating the best structural stability, as well as the best He-ion irradiation resistance, which can be attributed to its low mobility of He atoms and point defects.

关键词： High entroy alloy(HEA) CrMnFeCoNi He-ion Irradiation Hardening

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Faceted Kurdjumov-Sachs interface-induced slip continuity in the eutectic high-entropy alloy,AlCoCrFeNi_(2.1)

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Journal of Materials Science & Technology 2021年第6期65卷 216-227页

作者： Ting xiong Wenfan Yang shijian Zheng Zhaorui Liu Yiping Lu Ruifeng Zhang Yangtao Zhou Xiaohong Shao Bo Zhang Jun Wang Fuxing Yin Peter K.Liaw Xiuliang Ma Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang 110016China School of Material Science and Engineering.University of Science and Technology of China Hefei 230026China Tianjin Key Laboratory of Materials Lamninating Fabrication and Interface Control Technology School of Materials Science and EngineeringHebei University of TechnologyTianjin 300130China School of Materials Science and Engineering Beihang UniversityBeijing 100191China Center for Integrated Computational Materials Engineering(International Research Institute for Multidisciplinary Science)and Key Laboratory of High-Temperature Structural Materials 8 Coatings Technology(Ministry of Industry and Informnation Technology) Beihang UniversityBeijing 100191China Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'an 710072.China Department of Materials Science and Engineering The University of TennesseeKnoxvilleTN37996USA School of Material Science and Engineering Lanzhou University of TechnologyLanzhou 730050China

Recently,the eutectic high-entropy alloy(EHEA),AlCoCrFeNi_(2.1),can reach a good balance of strength and *** dual-phase alloy exhibits a eutectic lamellar microstructure with large numbers of ***,the role of the interfaces in plastic deformation have not been revealed *** the present work,the orientation relationship(OR)of the interfaces has been clarified as the Kurdjumov-Sachs(KS)interfaces presenting〈111〉_(B2) 〈110〉_(FCC)and {110} _(B2){111}_(FCC) independent of their *** exist three kinds of interfaces in the EHEA,namely,The dominating interface and the secondary interface are both non-slip planes and atomistic-scale faceted,facilitating the nucleation and slip transmission of the *** formation mechanism of the preferred interfaces is revealed using the atomistic geometrical analysis according to the criteria of the low interfacial energy based on the coincidence-site lattice(CSL)*** particular,the ductility of the dual-phase alloy originates from the KS interface-induced slip continuity across interfaces,which provides a high slip-transfer geometric ***,the strengthening effect can be attributed to the interface resistance for the dislocation transmission due to the mismatches of the moduli and lattice parameters at the interfaces.

关键词： High-entropy alloy AICoCrFeNi_(2.1) Interface Kurdjumov-Sachs(KS) Dislocation

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CPR1000核电厂核岛主设备热棘轮现象试验评估方法研究

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核动力工程 2014年第5期35卷 94-96页

作者：伍时建金挺熊光明刘乐中广核工程有限公司广东深圳518124 环境保护部核与辐射安全中心北京100082

针对RCC-M评定准则对部分部件的热棘轮现象无法做出安全性评定的问题,综合考虑塑性变形和弹性变形的影响,详细分析CPR1000核电厂稳压器电加热喷雾接管的热棘轮现象。计算结果表明,RCC-M热棘轮评定准则过于保守,试验分析方法更精确,可提... 详细信息

针对RCC-M评定准则对部分部件的热棘轮现象无法做出安全性评定的问题,综合考虑塑性变形和弹性变形的影响,详细分析CPR1000核电厂稳压器电加热喷雾接管的热棘轮现象。计算结果表明,RCC-M热棘轮评定准则过于保守,试验分析方法更精确,可提高核电建设的经济性。

关键词：热棘轮累积变形效率设计曲线比率曲线

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