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Alumina supported platinum-ceria catalyst for reverse water gas shift reaction

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Journal of Rare Earths 2025年第2期43卷 284-294页

作者： Na Jiang Weiwei Wang Haoxin Liu Meiyao Wu Chunjiang Jia Key Laboratory for Colloid and Interface Chemistry Key Laboratory of Special Aggregated MaterialsSchool of Chemistry and Chemical EngineeringShandong University

The activation of CO2molecules is a fundamental step for their effective *** highdensity oxygen vacancies on the surface of reducible oxides is pivotal for the activation of *** this work,we prepared a series of 0.5PtxCe/Al2O3（x=1,5,10,or 20） catalysts with varying Ce loading and 0.5 wt% of Pt for the reverse water gas shift（RWGS） *** size of CeO2particle increases with Ce ***,the 0.5Pt5Ce/Al2O3catalyst with an average CeO2particle size of 5.5 nm exhibits a very high CO2conversion rate(116.4×10-5molCO2/(gcat·s)) and CO selectivity（96.1%） at 600℃.Our experimental findings reveal that the small-size CeO2in 0.5Pt5Ce/Al2O3possesses a greater capacity to generate reactive oxygen vacancies,promoting the adsorption and activation of *** addition,the oxygen vacancies are cyclically generated and consumed during the reaction,which contributes to the elevated catalytic performance of the *** work provides a general strategy to construct rich oxygen vacancies on CeO2for designing high-performance catalysts in C1chemistry.

关键词： CO 2 activation Ceria Oxygen vacancies Size-effect Reverse water gas shift reaction Rare earths

16.48% Efficient solution-processed CIGS solar cells with crystal growth and defects engineering enabled by Ag doping strategy

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Journal of Energy Chemistry 2025年第1期100卷 59-65页

作者： Mengyu Xu Shaocong Yan Ting Liang Jia Jia Shengjie Yuan Dongxing Kou Zhengji Zhou Wenhui Zhou Yafang Qi Yuena Meng Litao Han Sixin Wu Key Laboratory for special Functional materials of MOE National&Local Joint Engineering Research Centre for High-efficiency Display and Lighting TechnologySchool of Nanoscience and Materials EngineeringHenan UniversityKaifeng 475004HenanChina

Solution-processed Cu(In,Ga)Se_(2)(CIGS) solar cells suffer from serious carrier recombination and power conversion efficiency(PCE) loss because of the poor film properties and easy formation of ***, we propose Ag&Se co-selenization strategy to enhance the crystallization and passivate harmful defects of the CIGS films. The formation of Ag-Se phase during the selenization process enables the formation of large grains and suppresses the deep level defects. It is found that Ag doping can enlarge the depletion region width, lower the Urbach energy and prolong the carrier lifetime. As a result, a champion solution-processed CIGS solar cell presents a high efficiency of 16.48% with the highly improved opencircuit voltage(VOC) of 662 m V and fill factor(FF) of 75.8%. This work provides an efficient strategy to prepare high quality solution-processed CIGS films for high-performance CIGS solar cells.

关键词： CIGS solarcells Solution-processedmethod Ag doping Crystal growth Defects engineering

Na_(2)B_(6)SO_(13) with unprecedented [B_(6)SO_(13)]_(∞) double chains and largest birefringence among borosulfates induced by the uniform arrangement of [B_(3)O_(7)] units

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Science China Chemistry 2025年第2期68卷 475-480页

作者： Jinbin Fan Ziting Yan Zilong Chen Huimin Li Zhihua Yang Fangfang Zhang Shilie Pan Research Center for Crystal materials State Key Laboratory of Functional Materials and Devices for Special Environmental ConditionsXinjiang Key Laboratory of Functional Crystal MaterialsXinjiang Technical Institute of Physics and ChemistryChinese Academy of SciencesUrumqi 830011China Center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Birefringence is crucial for birefringent crystals to modulate polarized light and nonlinear optical crystals to enable *** is closely related to the arrangement of advantageous functional groups with large microcosmic polarizability anisotropy in the ***,designing crystals with large birefringence by modulating the arrangement of advantageous functional groups is still a *** this work,the arrangement of the advantageous[B_(3)O_(7)]groups is optimized by introducing rigid tetrahedral[SO_(4)]groups,resulting in a novel boron-rich borosulfate,Na_(2)B_(6)SO_(13) ,which exhibits unprecedented[B_(6)SO_(13)]_(∞)double chain and an enhanced birefringence(Δn=0.07 at 589.3 nm)against the borate parent *** calculations confirm that the birefringence is mainly attributable to the uniform alignment of[B_(3)O_(7)]***_(2)B_(6)SO_(13) also possesses a deep ultraviolet(DUV)cutoff edge(λ<185 nm).This work provides a feasible method to design DUV birefringent crystals with large birefringence by inducing the arrangement of advantageous functional groups.

关键词： borosulfate deep ultraviolet birefringence modulated groups

Revealing the Role of Hydrogen in Highly Efficient Ag-Substituted CZTSSe Photovoltaic Devices:Photoelectric Properties Modulation and Defect Passivation

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Nano-Micro Letters 2025年第4期17卷 166-180页

作者： Xiaoyue Zhao Jingru Li Chenyang Hu Yafang Qi Zhengji Zhou Dongxing Kou Wenhui Zhou Shengjie Yuan Sixin Wu The Key Laboratory for special Functional materials of MOE School of Nanoscience and Materials EngineeringNational and Local Joint Engineering Research Center for High-Efficiency Display and Lighting TechnologyCollaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng 475004People’s Republic of China

The presence of SnZn-related defects in Cu_(2)ZnSn(S,Se)_(4)(CZTSSe)absorber results in large irreversible energy loss and extra irreversible electron-hole non-radiative recombination,thus hindering the efficiency enhancement of CZTSSe *** the incorporation of Ag in CZTSSe can effectively suppress the SnZn-related defects and significantly improve the resulting cell performance,an excellent efficiency has not been achieved to date primarily owing to the poor electrical-conductivity and the low carrier density of the CZTSSe film induced by Ag ***,this study exquisitely devises an Ag/H co-doping strategy in CZTSSe absorber via Ag substitution programs followed by hydrogen-plasma treatment procedure to suppress SnZn defects for achieving efficient CZTSSe ***-depth investigation results demonstrate that the incorporation of H in Ag-based CZTSSe absorber is expected to improve the poor electrical-conductivity and the low carrier density caused by Ag ***,the C=O and O-H functional groups induced by hydrogen incorporation,serving as an electron donor,can interact with under-coordinated cations in CZTSSe material,effectively passivating the SnZn-related ***,the incorporation of an appropriate amount of Ag/H in CZTSSe mitigates carrier non-radiative recombination,prolongs minority carrier lifetime,and thus yields a champion efficiency of 14.74%,showing its promising application in kesterite-based CZTSSe devices.

关键词： CZTSSe Ag/H co-doping Photoelectric properties modulation Defect passivation Non-radiative recombination

Microstructural evolution during the progressive transformation-induced plasticity effect in a Fe-0.1C-5Mnmedium manganese steel

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International Journal of Minerals,Metallurgy and materials 2025年第2期32卷 369-379页

作者： Mei Zhang Wenhao Li Yangfei Chen Yang Jiang Xiaofei Guo Han Dong School of materials Science and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of Advanced special Steel Shanghai UniversityShanghai 200444China

The microstructural evolution of a cold-rolled and intercritical annealed medium-Mn steel(Fe-0.10C-5Mn)was investigated during uniaxial tensile ***-situ observations under scanning electron microscopy,transmission electron microscopy,and X-ray diffraction analysis were conducted to characterize the progressive transformation-induced plasticity process and associated fracture initiation *** findings were discussed with the local strain measurements via digital image *** results indicated that Lüders band formation in the steel was limited to 1.5%strain,which was mainly due to the early-stage martensitic phase transformation of a very small amount of the less stable large-sized retained austenite(RA),which led to localized stress concentrations and strain hardening and further retardation of *** small-sized RA exhibited high stability and progressively transformed into martensite and contributed to a stably extended Portevin-Le Chatelier *** volume fraction of RA gradually decreased from 26.8%to 8.2%prior to *** the late deformation stage,fracture initiation primarily occurred at the austenite/martensite and ferrite/martensite interfaces and the ferrite phase.

关键词： medium-Mn steel retained austenite progressive transformation-induced plasticity effect local strain fracture initiation

Light-controlled protein imprinted nanospheres with variable recognition specificity

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Chinese Chemical Letters 2025年第2期36卷 173-178页

作者： Mingqi Wang Shixin Fa Jiate Yu Guoxian Zhang Yi Yan Qing Liu Qiuyu Zhang Key Laboratory of special Functional and Smart Polymer materials of Ministry of Industry and Information Technology School of Chemistry and Chemical Engineering Northwestern Polytechnical University

This work develops a protein imprinted nanosphere with varied recognition specificity for bovine serum albumin(BSA) and lysozyme(Lyz) under different UV light through a gradient dual crosslinked imprinting strategy(i.e., covalent crosslinking and dynamic reversible crosslinking). The imprinting cavities are initially constructed using irreversible covalent crosslinking to specifically recognize BSA, and then the coumarin residues in the imprinting cavities are crosslinked under 365 nm UV light to further imprint Lyz,because Lyz has smaller size than BSA. Since the photo-crosslinking of coumarin is a reversible reaction,the imprinting cavities of Lyz can be de-crosslinked under 254 nm UV light and restore the imprinting cavities of BSA. Moreover, the N-isopropyl acrylamide(NIPAM) and pyrrolidine residues copolymerized in the polymeric surface of the nanospheres are temperature-and p H-responsive respectively. Therefore, the protein rebinding and release behaviors of the nanospheres are controlled by external temperature and p H. As a result, the materials can selectively separate BSA from real bovine whole blood and Lyz from egg white under different UV light. This study may provide a new strategy for construction of protein imprinted materials with tunable specificity for different proteins.

关键词： Dynamically reversible crosslinking Molecularly imprinting Protein recognition Stimulus-response Variable specificity

Hybrid conductive-lithophilic-fluoride triple protection interface engineering:Dendrite-free reverse lithium deposition for high-performance lithium metal batteries

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Journal of Energy Chemistry 2025年第2期101卷 416-428页

作者： Huiying Li Chang Hong Runming Tao Xiaolang Liu Jianxing Wang Jianyu Chen Shuhao Yao Jiazhi Geng Guang Zheng Jiyuan Liang Key Laboratory of Optoelectronic Chemical materials and Devices of Ministry of Education School of Optoelectronic Materials & Technology Jianghan University Applied materials division Argonne National Laboratory State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced materials (IAM) Nanjing University of Posts & Telecommunications

Lithium metal batteries（LMBs） with high energy density are impeded by the instability of solid electrolyte interface（SEI） and the uncontrolled growth of lithium（Li） *** mitigate these challenges,optimizing the SEI structure and Li deposition behavior is the key to stable *** study novelty proposes a facile synthesis of MgF2/carbon（C） nanocomposite through the mechanochemical reaction between metallic Mg and polytetrafluoroethylene（PTFE） powders,and its modified polypropylene（PP）separator enhances LMB *** in-situ formed highly conductive fluorine-doped C species play a crucial role in facilitating ion/electron transport,thereby accelerating electrochemical kinetics and altering Li deposition *** cycling,the in-situ reaction between MgF2and Li leads to the formation of LiMg alloy,along with a LiF-rich SEI layer,which reduces the nucleation overpotential and reinforces the interphase strength,leading to homogeneous Li deposition with dendrite-free *** from these merits,the Li metal is densely and uniformly deposited on the MgF2/C@PP separator side rather than on the current collector ***,the symmetric cell with MgF2/C@PP exhibits superb Li plating/stripping performance over 2800 h at 1 mA cm-2and 2 mA h *** importantly,the assembled Li@MgF2/C@PPILiFePO4full cell with a low negative/positive ratio of 3.6delivers an impressive cyclability with 82.7% capacity retention over 1400 cycles at 1 C.

关键词： Lithium metal batteries Mechanochemical reaction MgF2 Reverse deposition Separator modification

Microstructural evolution during tempering process and mechanical properties of Cr-Ni-Mo-V/Nb high strength steel

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Journal of Iron and Steel Research International 2025年第1期32卷 270-281页

作者： Zi-wei Lv Jing Fan Rui Wang Zhi-qiang Yu Yan Kang Yong Hu Lei-feng Tuo Jürgen Eckert Zhi-jie Yan School of materials Science and Engineering North University of ChinaTaiyuan 030051ShanxiChina Shanxi Key Laboratory of Advanced Metal materials for special Environments North University of ChinaTaiyuan 030051ShanxiChina School of materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024ShanxiChina Erich Schmid Institute of materials Science Austrian Academy of SciencesLeoben 8700Austria Department of materials Science Chair of Materials PhysicsMontanuniversitat LeobenLeoben 8700Austria

High strength steels exhibit superior mechanical properties due to the unique microstructure,which successfully solves the drawback of the inevitable strength-toughness trade-off that occurs in traditional *** we investigated the effect of matrix and precipitates on mechanical properties of Cr-Ni-Mo-V/Nb steel after water quenching and tempering(150-500℃).The results showed that the microstructure of the present steel is noticeably tuned by changing the tempering *** excellent combination of strength(a yield strength of 1308 MPa with a total elongation of 8.2%)and toughness(Charpy V-notch impact toughness of 40.5 J/cm^(2))is obtained upon tempering at 200℃.This is attributed to the lath martensite containing high dislocation density,the martensite-twin substructure,and the strengthening effects of the precipitated needle-likeε-carbides and spherical VC *** acicularε-carbides are replaced by the rod-shaped Fe_(3)C at the tempering temperature of 350℃,resulting in the remarkable deterioration in strength,hardness,and *** carbides formed at a tempering temperature of 500℃ are beneficial to the enhancement of the elongation and toughness,but the strength decreases due to the matrix softening caused by the recovery of dislocation.

关键词： High strength steel Tempering Microstructure Carbide Mechanical property

Multifunctional Nacre‑Like Nanocomposite Papers for Electromagnetic Interference Shielding via Heterocyclic Aramid/MXene Template‑Assisted In‑Situ Polypyrrole Assembly

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Nano-Micro Letters 2025年第3期17卷 37-54页

作者： Jinhua Xiong Xu Zhao Zonglin Liu He Chen Qian Yan Huanxin Lian Yunxiang Chen Qingyu Peng Xiaodong He National Key Laboratory of Science and Technology On Advanced Composites in special Environments Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080People’s Republic of China

Robust, ultra-flexible, and multifunctional MXene-basedelectromagnetic interference (EMI) shielding nanocomposite filmsexhibit enormous potential for applications in artificial intelligence,wireless telecommunication, and portable/wearable electronic *** this work, a nacre-inspired multifunctional heterocyclic aramid(HA)/MXene@polypyrrole (PPy) (HMP) nanocomposite paper withlarge-scale, high strength, super toughness, and excellent tolerance tocomplex conditions is fabricated through the strategy of HA/MXenehydrogel template-assisted in-situ assembly of PPy. Benefiting from the"brick-and-mortar" layered structure and the strong hydrogen-bondinginteractions among MXene, HA, and PPy, the paper exhibits remarkable mechanical performances, including high tensile strength (309.7 MPa),outstanding toughness (57.6 MJ m−3), exceptional foldability, and structural stability against ultrasonication. By using the template effect ofHA/MXene to guide the assembly of conductive polymers, the synthesized paper obtains excellent electronic conductivity. More importantly,the highly continuous conductive path enables the nanocomposite paper to achieve a splendid EMI shielding effectiveness (EMI SE) of 54.1 dBat an ultra-thin thickness (25.4 μm) and a high specific EMI SE of 17,204.7 dB cm2g−1. In addition, the papers also have excellent applicationsin electromagnetic protection, electro-/photothermal de-icing, thermal therapy, and fire safety. These findings broaden the ideas for developinghigh-performance and multifunctional MXene-based films with enormous application potential in EMI shielding and thermal management.

关键词： MXene Remarkable mechanical properties Heterocyclic aramid Electromagnetic interference shielding Polypyrrole Multifunctionality