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Solution-processed rare-earth thulium oxide with high permittiv.ty for low-v.ltage transistor and inv.rters applications

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Journal of Rare Earths 2024年第8期42卷 1604-1609,I0007页

作者： Daiming Liu Fei Wang Yongtao Zhang ya.nan Ding Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon-Materials College of Electromechanical EngineeringQingdao University of Science&TechnologyQingdao266061China College of Electronic and Information Engineering Shandong University of Science and TechnologyQingdao266590China

The use of high-permittiv.ty(high-k) thin films as gate dielectrics is essential in the dev.lopment of lowpower electronics,In this work,rare-earth thulium oxide(Tm_(2)O_(3)) thin films were prepared by a facile solution process and annealed at v.rious temperatures from 400 to 700℃.The ev.lution of the physical and dielectric properties of Tm_(2)O_(3) thin film with annealing temperature was *** is demonstrated that the Tm_(2)O_(3) thin film annealed at 600℃ exhibits the optimal performance,including a low leakage current of 3×10^(-10) A/cm^(2),a large areal capacitance of 250 nF/cm^(2) at 100 Hz,and a high permittiv.ty v.lue of *** Tm_(2)O_(3) thin film as a gate insulator was integrated into the thin film transistor(TFT) employing In_(2)O_(3)-based semiconducting *** In_(2)O_(3) TFT with 600℃-annealed Tm_(2)O_(3) dielectric exhibits the superior perfo rmance,with a high I_(on)/I_(off) of 1.65×10^(7),a small subthre shold swing(SS) v.lue of 0.2 v.dec,a v.(TH) of+1.8 v.and a mobility of 1.68 cm^(2)/(v.s).Furthermore,an inv.rter constructed by connecting the TFT with a resistor exhibits full-swing *** work prov.des a facile and appealing method for preparing the high-k Tm_(2)O_(3) thin films as alternativ. gate dielectrics with the potential for use in low-power electronics and logic circuit applications.

关键词： Rare earths Tm_(2)O_(3) Dielectric Transistor Inv.rter

An activ. learning workflow for predicting hydrogen atom adsorption energies on binary oxides based on local electronic transfer features

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Green Energy & Env.ronment 2024年第10期9卷 1489-1496页

作者： Wenhao Jing Zihao Jiao Mengmeng Song ya.Liu Liejin Guo International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Department of Energy and Power Engineering Shandong University of Technology

Machine learning combined with density functional theory（DFT） enables rapid exploration of catalyst descriptors space such as adsorption energy, facilitating rapid and effectiv. catalyst screening. Howev.r, there is still a lack of models for predicting adsorption energies on oxides,due to the complexity of elemental species and the ambiguous coordination env.ronment. This work proposes an activ. learning workflow（Le NN） founded on local electronic transfer features（e） and the principle of coordinate rotation inv.riance. By accurately characterizing the electron transfer to adsorption site atoms and their surrounding geometric structures, Le NN mitigates abrupt feature changes due to different element types and clarifies coordination env.ronments. As a result, it enables the prediction of *H adsorption energy on binary oxide surfaces with a mean absolute error（MAE） below 0.18 e v. Moreov.r, we incorporate local cov.rage（θl） and lev.rage neutral network ensemble to establish an activ. learning workflow, attaining a prediction MAE below 0.2 e v.for 5419 multi-*H adsorption structures. These findings v.lidate the univ.rsality and capability of the proposed features in predicting *H adsorption energy on binary oxide surfaces.

关键词： Machine learning Adsorption energy Binary oxide Electron transfer Activ. learning

Engineering FeOOH/Ni(OH)_(2) heterostructures on Ni_(3)S_(2)surface to enhance seawater splitting

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Rare Metals 2024年第5期43卷 1989-1998页

作者： Chen ya.g ya.Dong Li Li-Juan Cao Xi-Long Wang Han-Pu Liang Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Sino-Danish College University of Chinese Academy of SciencesBeijing 100049China

The construction of highly stable and efficient electrocatalysts is desirable for seawater splitting but remains challenging due to the high concentration of Cl-in ***,FeOOH/Ni(OH)_(2)heterostructure supported on Ni_(3)S_(2)-cov.red nickel foam(Fe–Ni/Ni_(3)S_(2)/NF)was fabricated by hydrothermal and etching methods,as well as anodic oxidation *** electronic structure of FeOOH and Ni(OH)_(2)could be modulated after depositing FeOOH nanoparticles on Ni(OH)_(2)nanosheet,which greatly boosted the catalytic *** the catalyst used as an electrode for oxygen ev.lution reaction(OER),it needed low ov.rpotentials of 266 and 368 m v.to achiev. current densities of 100 and 800 m A·cm^(-2),respectiv.ly,in 1 mol·L^(-1)KOH+seawater *** can operate continuously at 100 m A·cm^(-2)for 400 h without obv.ous ***,in situ generated SO_(4)^(2-)from inner Ni_(3)S_(2)during electrolysis process would accumulate on the surface of activ. sites to form passiv.tion layers to repel Cl^(-),which seemed to be responsible for superior *** study not only synthesizes an OER catalyst for highly selectiv. and stable seawater splitting,but also giv.s a nov.l approach for industrial hydrogen production.

关键词： Anodic oxidation Heterostructure Oxygen ev.lution reaction Seawater splitting

Morphology and v.lence state ev.lution of Cu:Unrav.ling the impact on nitric oxide electroreduction

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Journal of Energy Chemistry 2024年第4期91卷 276-286页

作者： Ting Sun Fengyu Gao ya.Wang Honghong Yi Qingjun Yu Shunzheng Zhao Xiaolong Tang School of Energy and Env.ronmental Engineering University of Science and Technology BeijingBeijing 100083China

Ammonia(NH3)serv.s as a critical component in the fertilizer industry and fume gas ***,the conv.ntional NH3production process,namely the Haber-Bosch process,leads to considerable energy consumption and waste gas *** address this,electrocatalytic nitric oxide reduction reaction(NORR)has emerged as a promising strategy to bridge NH3consumption to NH3production,harnessing renewable electricity for a sustainable ***(Cu)stands out as a prominent electrocatalyst for NO reduction,giv.n its exceptional NH3yield and ***,a crucial aspect that remains insufficiently explored is the effects of morphology and v.lence states of Cu on the NORR *** this inv.stigation,we synthesized CuO nanowires(CuO-NF)and Cu nanocubes(Cu-NF)as cathodes through an in situ growth ***,CuO-NF exhibited an impressiv. NH3yield of 0.50±0.02 mg cm^(-2)h^(-1)at-0.6 v.*** hydrogen electrode(RHE)with faradaic efficiency of29,68%±1,35%,surpassing that of Cu-NF(0.17±0.01 mg cm^(-2)h^(-1),16.18%±1.40%).Throughout the electroreduction process,secondary cubes were generated on the CuO-NF surface,preserv.ng their nanosheet cluster morphology,sustained by an abundant supply of subsurface oxygen(s-O)ev.n after an extended duration of 10 h,until s-O depletion ***,Cu-NF exhibited inadequate s-O content,leading to rapid crystal collapse within the same *** distinctiv. current-potential relationship,akin to a v.lcano-type curv.,was attributed to distinct NO hydrogenation *** Tafel analysis rev.aled the exchange current density(i0)and standard heterogeneous rate constant(k0)for CuO-NF,yielding 3.44×10^(-6)A cm^(-2)and 3.77×10^(-6)cm^(-2)s^(-1)when NORR was driv.n by *** findings rev.aled the potential of CuO-NF for NO reduction and prov.ded insights into the intricate interplay between crystal morphology,v.lence states,and electrochemical performance.

关键词： NORR Ammonia Synthesis Copper Morphology v.lence States Mechanism

In-situ interfacial passiv.tion and self-adaptability synergistically stabilizing all-solid-state lithium metal batteries

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Journal of Energy Chemistry 2024年第1期88卷 282-292,I0007页

作者： Huanhui Chen Xing Cao Moujie Huang Xiangzhong Ren Yubin Zhao Liang Yu ya.Liu Liubiao Zhong Yejun Qiu Shenzhen Engineering Lab of Flexible Transparent Conductiv. Films School of Materials Science and EngineeringHarbin Institute of TechnologyShenzhen 518055GuangdongChina Guangdong Prov.ncial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems School of Materials Science and EngineeringHarbin Institute of TechnologyShenzhen 518055GuangdongChina College of Chemistry and Env.ronmental Engineering Shenzhen UniversityShenzhen 518060GuangdongChina School of Resource and Env.ronmental Sciences Wuhan UniversityWuhan 430072HubeiChina

The function of solid electrolytes and the composition of solid electrolyte interphase(SEI)are highly significant for inhibiting the growth of Li ***,we report an in-situ interfacial passiv.tion combined with self-adaptability strategy to reinforce Li_(0.33)La_(0.557)TiO_(3)(LLTO)-based solid-state ***,a functional SEI enriched with LiF/Li_(3)PO_(4) is formed by in-situ electrochemical conv.rsion,which is greatly beneficial to improv.ng interface compatibility and enhancing ion *** the polarized dielectric BaTiO_(3)-polya.ic acid(BTO-PAA,BP)film greatly improv.s the Li-ion transport kinetics and homogenizes the Li *** expected,the resulting electrolyte offers considerable ionic conductiv.ty at room temperature(4.3 x 10~(-4)S cm^(-1))and appreciable electrochemical decomposition v.ltage(5.23 v.after electrochemical *** Li-LiFePO_(4) batteries,it shows a high specific capacity of 153 mA h g^(-1)at 0.2C after 100 cycles and a long-term durability of 115 mA h g^(-1)at 1.0 C after 800 ***,a stable Li plating/stripping can be achiev.d for more than 900 h at 0.5 mA cm^(-2).The stabilization mechanisms are elucidated by ex-situ XRD,ex-situ XPS,and ex-situ FTIR techniques,and the corresponding results rev.al that the interfacial passiv.tion combined with polarization effect is an effectiv. strategy for improv.ng the electrochemical *** present study prov.des a deeper insight into the dynamic adjustment of electrode-electrolyte interfacial for solid-state lithium batteries.

关键词： Solid-state lithium batteries Composite solid electrolyte In-situ polymerization Interfacial passiv.tion layer Self-adaptability

The Iwasav. decomposition and intermediate subgroups of the Steinberg groups ov.r the field of fractions of a principal ideal ring

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Science China Mathematics 2009年第2期52卷 318-322页

作者： MOISEENKOv. T. v. NUZHIN ya. N. Institute of Fundamental Dev.lopment Siberian Federal University St. Kirenskogo 26Krasnoyarsk 660074Russia

Abstract The Iwasav. decomposition is prov.d for the Steinberg groups of types 2 A 2l?1, 2 D l , 2 E 6, 3 D 4 ov.r the field of fractions of a principal ideal ring. By using this decomposition, it is described that su... 详细信息

关键词： principal ideal ring Steinberg group intermediate subgroups 20G25

Deciphering dynamic surface of PtRu alloy nanocatalysts to rev.sit their synergistic effects during the electrooxidation

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Science China Chemistry 2024年第7期67卷 2224-2233页

作者： Xiao-Chong Li Bo Wang Zhou Yu Qiang Wan Ju-Fang Zheng Emmanuel Maisonhaute Xiao-Shun Zhou ya.Hao Wang Key Laboratory of the Ministry of Education for Adv.nced Catalysis Materials Institute of Physical ChemistryZhejiang Normal UniversityJinhua 321004China Laboratoire Interface et Systèmes Electrochimiques CNRS UMR 8235Sorbonne UniversitéF-75252 Paris cedex 5France

Correlating dynamic structural transformation of catalysts with the surface intermediate species under operating conditions is critical for updating the understanding of structure–performance ***,we probe the electrochemical potentialdependent surface structures and adsorbed intermediates on PtRu binary alloy nanocatalysts to rev.sit its synergistic mechanisms for CO electrooxidation enhanced ***-situ spectral characteristics by using modified shell-isolated nanoparticle-enhanced Raman spectroscopy,show that in acidic solution,when the potential is positiv.ly scanned from 0.1 v.to 1.5 v.relativ. to rev.rsible hydrogen electrode(RHE),the surface of the alloy catalyst ev.lv.s from metallic PtRu to adsorbed oxygen gradually cov.ring and accumulating on Ru sites(denoted as PtRuO_(x),x≤2),forming segregated RuO_(2),and finally forming a threedimensional oxide layer(denoted as 3D PtRuO_(4)).Moreov.r,molecular ev.dence associated with periodic density functional theory calculations rev.als that electronic effects promote ruthenium to become more oxidizable and *** particular,we found here that ^(*)O and ^(*)OH at surface RuO_(x) sites are highly efficient CO oxidation activ. species in comparison to the same entities adsorbed on metallic Ru *** work sheds light on the complex surface dynamic process of practical Pt-based binary nanocatalysts and improv.s the understanding of synergistic mechanism for the dev.lopment of fuel cell dev.ces.

关键词： in-situ Raman spectroscopy surface ev.lution bifunctional mechanism PtRu electrooxidation

Hierarchically Macroporous Zeolite ZSM-5 Microspheres for Efficient Catalysis

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Chemical Research in Chinese Univ.rsities 2024年第4期40卷 704-711页

作者： ZHENG Mingdan CHEN ya.LIU Zhan LYU Jiamin YE Bo SUN Ming-Hui CHEN Li-Hua SU Bao-Lian State Key Laboratory of Adv.nced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070P.R.China Laboratory of Inorganic Materials Chemistry(CMI) University of Namur5000NamurWalloniaBelgium

Hollow zeolite microspheres hav. recently attracted much attention for their applications in catalysis,microreactors and ***,we present hierarchically structured zeolite ZSM-5 microspheres with unique,abundant macropores that allow more efficient use for *** hierarchically macroporous zeolite ZSM-5 microspheres are synthesized under the assistance of water/oil emulsions and using polystyrene nanospheres as *** zeolite microsphere is assembled by uniform hollow zeolite *** large inner cav.ties and thin zeolite shells lead to smaller diffusion channel and higher improv.d accessibility to activ. sites,contributing to high catalytic performance in the catalytic conv.rsion of benzyl alcohol in *** nov.l zeolite microspheres with impressiv. performance will be applied to numerous other industrial catalytic reactions.

关键词： Hierarchically porous structure Hollow structure Microsphere Zeolite ZSM-5 Alkylation

The dynamics beamline at SSRF

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Nuclear Science and Techniques 2024年第9期35卷 56-67页

作者： Zhen Liu Li-Hua Wang Yong Jiang ya.Jun Tong Hua-Chun Zhu Te Ji Min Chen Zheng Jiang Xiang-Jun Wei Shanghai Adv.nced Research Institute Chinese Academy of SciencesShanghai 201204China ShanghaiTech Univ.rsity Shanghai 201210China

The dynamics beamline(D-Line),which combines synchrotron radiation infrared spectroscopy(SR-IR)and energy-disper-siv. X-ray absorption spectroscopy(ED-XAS),is the first beamline in the world to realize concurrent ED-XAS and SR-IR measurements at the same sample position on a millisecond time-resolv.d *** combined technique is effectiv. for inv.stigating rapid structural changes in atoms,electrons,and molecules in complicated disorder systems,such as those used in physics,chemistry,materials science,and extreme ***,ED-XAS and SR-IR can be used independently in the two branches of the *** ED-XAS branch is the first ED-XAS beamline in China,which uses a tapered undulator light source and can achiev. approximately 2.5×10^(12)photons/s·300 ev.BW@7.2 kev.at the sample *** exchange-able polychromator operating in the Bragg-reflection or Laue-transmission configuration is used in different energy ranges to satisfy the requirements for beam size and energy *** focused beam size is approximately 3.5μm(H)×21.5μm(v.,and the X-ray energy range is 5–25 *** one-and two-dimensional position-sensitiv. detectors with frame rates of up to 400 kHz enables time resolutions of tens of microseconds to be *** distinctiv. techniques,such as the concurrent measurement of in situ ED-XAS and infrared spectroscopy,time-resolv.d ED-XAS,high-pressure ED-XAS,XMCD,and pump-probe ED-XAS,can be applied to achiev. different scientific goals.

关键词： ED-XAS SR-IR Time-resolv.d D-line SSRF