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An experimental and computational investigation on structural evolution of the In_(2)O_(3)catalyst during the induction period of CO_(2)hydrogenation

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Chinese Journal of Catalysis 2025年第5期72卷 301-313页

作者： Zhangqian Wei Mingxiu Wang Xinnan Lu Zixuan Zhou Ziqi Tang Chunran Chang Yong Yang Shenggang Li Peng Gao Center for Low-Carbon Conversion Science and Engineering Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China University of the Chinese Academy of Sciences Beijing 100049China School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China Shaanxi Key Laboratory of Energy Chemical Process Intensification School of Chemical Engineering and TechnologyXi’an Jiaotong UniversityXi’an 710049ShaanxiChina

As one of the most important industrially viable methods for carbon dioxide(CO_(2))utilization,methanol synthesis serves as a platform for production of green fuels and commodity *** sustainable methanol synthesis,In_(2)O_(3)is an ideal catalyst and has garnered significant ***,cubic In_(2)O_(3)nanoparticles were prepared via the precipitation method and evaluated for CO_(2)hydrogenation to produce *** the initial 10 h of reaction,CO_(2)conversion gradually increased,accompanied by a slow decrease of methanol selectivity,and the reaction reached equilibrium after 10-20 h on *** activation and induction stage may be attributed to the sintering of In_(2)O_(3)nanoparticles and the creation of more oxygen vacancies on In_(2)O_(3)*** experimental studies demonstrate that hydrogen induction created additional oxygen vacancies during the catalyst activation stage,enhancing the performance of In_(2)O_(3)catalyst for CO_(2)*** functional theory calculations and microkinetic simulations further demonstrated that surfaces with higher oxygen vacancy coverages or hydroxylated surfaces formed during this induction period can enhance the reaction rate and increase the CO_(2)***,they predominantly promote the formation of CO instead of methanol,leading to reduced methanol *** predictions align well with the above-mentioned experimental *** work thus provides an in-depth analysis of the induction stage of the CO_(2)hydrogenation process on In_(2)O_(3)nano-catalyst,and offers valuable insights for significantly improving the CO_(2)reactivity of In_(2)O_(3)-based catalysts while maintaining long-term stability.

关键词： In_(2)O_(3) CO_(2)hydrogenation Methanol production Induction and activation Structural evolution

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Portable, High-Frequency, and High-Voltage Control Circuits for Untethered Miniature Robots Driven by Dielectric Elastomer Actuators

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arXiv 2025年

作者： Shao, Qi Liu, Xin-Jun Zhao, Huichan Department of Mechanical Engineering State Key Laboratory of Tribology in Advanced Equipment Beijing Key Laboratory of Transformative High-end Manufacturing Equipment and Technology Tsinghua University Beijing100084 China

In this work, we propose a high-voltage, high-frequency control circuit for the untethered applications of dielectric elastomer actuators (DEAs). The circuit board leverages low-voltage resistive components connected in series to control voltages of up to 1.8 kV within a compact size, suitable for frequencies ranging from 0 to 1 kHz. A single-channel control board weighs only 2.5 g. We tested the performance of the control circuit under different load conditions and power supplies. Based on this control circuit, along with a commercial miniature high-voltage power converter, we construct an untethered crawling robot driven by a cylindrical DEA. The 42-g untethered robots successfully obtained crawling locomotion on a bench and within a pipeline at a driving frequency of 15 Hz, while simultaneously transmitting real-time video data via an onboard camera and antenna. Our work provides a practical way to use low-voltage control electronics to achieve the untethered driving of DEAs, and therefore portable and wearable devices. Copyright © 2025, The Authors. All rights reserved.

关键词： Wearable antennas

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Photocatalytic water splitting versus H_(2) generation coupled with organic synthesis:A large critical review

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Chinese Journal of Catalysis 2025年第3期70卷 44-114页

作者： Oleksandr Savateev Jingru Zhuang Sijie Wan Chunshan Song Shaowen Cao Junwang Tang Department of Chemistry The Chinese University of Hong KongShatinNew TerritoriesHong KongChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Industrial Catalysis Center Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

Photocatalytic water splitting using natural solar light is considered as a sustainable approach to generate H_(2) and O_(2).While H_(2) has high market value,the by-product of water splitting,oxygen,is less *** make H_(2) produced by means of photocatalysis more economically competitive to that generated from methane,its generation is studied together with synthesis of organic compounds that have higher market *** review summarizes and analyzes critically dehydrogenation reactions that were developed since *** dehydrogenation reactions are classified and the results are collected in the online *** of homogeneous and heterogenous photocatalysts in dehydrogenation reactions,such as yield rates of organic products on analytical and preparative scales,and quantum efficiencies are *** limitations of the existing methods and photocatalytic systems are identified and directions for the future developments are outlined.

关键词： Acceptorless dehydrogenation Photocatalysis Photoredox catalysis Hydrogen Organic synthesis

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Inhibition of KDM6B prevents osteoarthritis by blocking growth plate-like H3K27me3 loss in bivalent genes

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Science China Life Sciences 2025年第5期68卷 1423-1436页

作者： Hao Du Yao Zhang Xi Yu Xuanhe You Diwei Wu Ze Du Yongrui Cai Zhenyu Luo Hanpeng Lu Zhixin Liao Bi-Sen Ding Ya Zhao Yan Wang Ke Xiao Fan Yang Fangji Gan Ning Ning Jiancheng Zeng Peiliang Shi Zongke Zhou Shishu Huang Department of Orthopedic Surgery and Orthopedic Research Institute West China HospitalSichuan University Rehabilitation Medicine Center West China HospitalSichuan University Key Laboratory of Birth Defects and Related Diseases of Women and Children of MOE State Key Laboratory of BiotherapyWest China Second University HospitalSichuan University Institute of Translational Medicine Medical CollegeYangzhou University Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research College of Animal Science and Technology Sichuan Agricultural University Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province Sichuan Agricultural University Department of Lower Limb Surgery of Sichuan Province Orthopedic Hospital Central Laboratory of Sichuan Province Orthopedic Hospital Brain Cognition and Brain Disease Institute (BCBDI) Shenzhen Institute of Advanced TechnologyChinese Academy of Sciences (CAS)Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions School of Mechanical Engineering Sichuan University Gem Pharmatech (Chengdu) Co. Ltd.

Osteoarthritis(OA) is the most prevalent joint disorder occurring with articular cartilage degradation. It includes a switch from an articular to a growth plate chondrocyte phenotype. Here, we investigated the histone modification profiles and found significant H3K27me3 loss in OA, which led to disease-associated gene expression. Surprisingly, these genes were occupied by both H3K27me3 and H3K4me3 in normal chondrocytes, showing a poised bivalent state. Furthermore, we observed the derepression of similar bivalent genes in growth plate chondrocytes. Finally, a KDM6B inhibitor GSK-J4 prevented the H3K27me3 loss and cartilage damage in the rat OA model. Our results reveal an inherited bivalent epigenetic signature on developmental genes that makes articular chondrocytes prone to hypertrophy and contributes to a promising epigenetic therapy for OA.

关键词： osteoarthritis histone modifications H3K27me3 bivalency growth plate

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Effects of Thermal Aging on Microstructure and Mechanical Properties of Interface of Hot Isostatic Pressing Densified Low Alloy Steel with Inconel 690 Cladding

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Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and engineering 2025年第4期54卷 879-885页

作者： Yu, Lei Cao, Rui Ma, Jinyuan Yan, Yingjie Dong, Hao Wang, Caiqin State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou730050 China School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China Advanced Technology & Materials Co. Ltd Beijing100081 China Hebei Hot Isostatic Pressing Technology Innovation Center Zhuozhou072750 China

The microstructure, micro-hardness, and tensile properties of interface between hot isostatic pressing densified low alloy steel and Inconel 690 cladding were investigated during the aging process at 600 ℃. The results show that the interface region can be divided into four zones from base metal to deposited metal: carbon-depleted zone (CDZ), partial melting zone (PMZ), planar growth zone (PGZ), and brownish feature zone (BFZ). Dimensions of these zones do not significantly change during aging. However, type I carbides noticeably increase in size in the PMZ, and precipitates clearly occur in the PGZ. The main reason for their growth and occurrence is continuous carbon migration. The highest micro-hardness appears in the PGZ and BFZ regions, which is related to carbon accumulation and precipitates in these regions. Tensile failure occurs on the base metal side due to the high strength mismatch between these two materials. The CDZ, composed of only ferrite, has lower strength and fractures at the boundary between CDZ and base metal. The ultimate tensile strength decreases by only 50 MPa after aging for 1500 h, and the interface region maintains high strength without significant deformation. Copyright © 2025, Northwest Institute for Nonferrous Metal Research. Published by Science Press. All rights reserved.

关键词： Tensile strength

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Solid-state stepwise temperature-programmable synthesis of bioinspired Fe-N-C oxygen reduction electrocatalyst featuring Fe-N_(5)configuration

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Nano Research 2025年第3期18卷 654-665页

作者： Wei Sang Somboon Chaemchuen Longyang Zhang Zechen Wang Xingchuan Li Cocoro Andrew Nagasaka Mo Xiong Naoki Ogiwara Cheng Chen Zhao Wang Jian Zhang Francis Verpoort Shichun Mu Zongkui Kou Tingting Wang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Basic Science School of Arts and SciencesThe University of TokyoKomabaMeguro-kuTokyo 153-8902Japan MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter School of PhysicsXi’an Jiao tong UniversityXi’an 710049China Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya 572000China Department of Chemical Engineering Faculty of EngineeringMahidol UniversityNakhon Pathom 73170Thailand School of Mathematical&Physical Sciences Wuhan Textile UniversityWuhan 430200China Joint Institute of Chemical Research(FFMiEN) Peoples Friendship University of Russia(RUDN University)6 Miklukho-Maklaya Str.117198 MoscowRussia National Research Tomsk Polytechnic University Lenin Avenue 30634050 TomskRussia Hubei Key Laboratory of Ferro &Piezo-electric Materials and DevicesFaculty of Physics and Electronic SciencesHubei UniversityWuhan 430062China School of Chemistry and Chemical Engineering Hainan UniversityHaikou 57022China

The bioinspired Fe-N-C features an asymmetric Fe-N_(5)configuration to produce active metal-oxygen intermediates by introducing axial N ligand into a symmetric Fe-N_(4) structure,enabling highly active oxygen reduction reaction(ORR).However,the artificial creation of active Fe-N_(5)configuration with a direct,facile and green method has been rarely developed yet,as current techniques involve complex processes and costly ***,we advance a novel solid-state stepwise temperature-programmable(SST)route to directly produce bioinspired Fe-N_(5)-*** then demonstrate that such a Fe-N_(5)-C exhibits a quite higher half-wave potential(0.92 V)with 22-fold faster ORR kinetics(15.6 mA·cm^(−2)@0.85 V)over that of the commercial Pt/C ***,we perform density functional theory(DFT)to find that the Fe is discharged with an extra 0.1 e^(−)through the axially coordinate N ligand,which significantly enhances the ability to activate O_(2) and enables an easier desorption of the crucial intermediate ^(*)OH on the Fe-N_(5)configuration over the conventional Fe-N_(4) structure.

关键词： single atom catalysts Fe-N_(5)coordination solvent-free synthesis oxygen reduction reaction(ORR) metal-air battery

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On the Cycle Structure of Some Nonlinear Feedback Shift Registers

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Chinese Journal of Electronics 2025年第4期23卷 801-804页

作者： Zhongxiao Wang Hong Xu Wenfeng Qi State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou Information Science and Technology Institute Zhengzhou China Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai China

In this paper, we partly determine the cycle structure of two types of Nonlinear feedback shift registers (NFSRs). Based on these results, the cycle structure of a class of NFSRs with symmetric feedback functions can be completely characterized. Furthermore, an alternative proof of Kjeldsen's results is presented. Compared with the original proof based on abstract algebra theory, ours is straightforward and easy to understand.

关键词： Abstract algebra Shift registers Cryptography

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g-C_(3)N_(4)nanosheets coupled with CoSe_(2)as co-catalyst for efficient photooxidation of xylose to xylonic acid

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Green Energy & Environment 2025年第1期10卷 231-238页

作者： Qi Hao Yijun Liu Ren Zou Ge Shi Shilian Yang Linxin Zhong Wu Yang Xiao Chi Yunpeng Liu Shimelis Admassie Xinwen Peng State Key Laboratory of Pulp and Paper Engineering South China University of TechnologyGuangzhou510641GuangdongChina Hainan Key Laboratory of Storage&Processing of Fruits and Vegetables Agricultural Products Processing Research InstituteChinese Academy of Tropical Agricultural SciencesZhanjiangGuangdong524001China Department of Chemistry and Centre for Advanced 2D Materials(CA2DM)National University of Singapore 3 Science Drive 3 Singapore117543Singapore School of Materials Science and Hydrogen Energy Foshan UniversityFoshan528231GuangdongChina Department of Chemistry Addis Ababa UniversityPO BOX 1176Addis AbabaEthiopia

Photocatalysis has emerged as an effective approach to sustainably convert biomass into value-added ***_(2)is a promising nonprecious,efficient cocatalyst for photooxidation,which can facilitate the separation of photogenerated electron–holes,increase the reaction rates,and enhance photocatalytic *** this work,we synthesized a stable and efficient photocatalysis system of CoSe_(2)/g-C_(3)N_(4)through attaching CoSe_(2)on g-C_(3)N_(4)sheets,with a yield of 50.12%for the selective photooxidation of xylose to xylonic *** light illumination,the photogenerated electrons were prone to migrating from g-C_(3)N_(4)to CoSe_(2)due to the higher work function of CoSe_(2),resulting in the accelerated separation of photogenerated electron–holes and the promoted ***,this study reveals the unique function of CoSe_(2),which can significantly promote oxygen adsorption,work as an electron sink and accelerate the generation of ·O_(2)^(-),thereby improving the selectivity toward xylonic acid over other *** work provides useful insights into the design of selective photocatalysts by engineering g-C_(3)N_(4)for biomass high-value utilization.

关键词： Biomass photooxidation Hemicelluloses Xylose g-C_(3)N_(4) Xylonic acid

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Investigation of the rigid structure, luminescence properties of stable CaY2Al4SiO12: Bi/Tb/Sm phosphors toward wLEDs application

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Ceramics International 2025年

作者： Chen, C.X. Zheng, X.Z. Dai, W.B. Ni, C.Y. Li, W.Y. Wu, D. Hubei Key Laboratory of Plasma Chemistry and Advanced Materials & Key Laboratory of Green Chemical Engineering Process of Ministry of Education Wuhan Institute of Technology Wuhan430205 China Key Laboratory of Testing and Tracing of Rare Earth Products for State Market Regulation Jiangxi University of Science and Technology Ganzhou341000 China

As energy consumption intensifies, energy saving and environmentally friendly phosphor-converted white light-emitting diodes (pc-wLEDs) have become the current research hotspots. The garnet-based CaY2Al4SiO12 (CYAS) phosphors, with their abundant lattice sites and stable physical properties, are ideal candidates as phosphor hosts. Through comprehensive experimental and theoretical analyses, including XRD/Rietveld refinement and density functional theory (DFT) calculations, it was determined that Bi3+/Tb3+/Sm3+ ions preferentially occupy the Y3+ lattice site. The luminescence properties and thermal stability of CYAS: Bi3+/Tb3+/Sm3+ have been extensively investigated. The quantum yield (QY) has been enhanced to 48.3 % due to energy transfer (ET), which is not a significant difference compared to existing phosphors, and by superposition of blue (Bi, 3P1 → 1S0), green (Tb, 5D4 → 7F5), and red (Sm, 4G5/2 → 6H5/2) emission, resulting in tunable spectrum and high-quality, full-spectrum white light emission. Finally, the wLED device with high color rendering index (CRI, 87), high luminous efficiency (LE, 74 lm·W−1), and low correlated color temperature (CCT, 4747.56 K) were fabricated by a remote ‘encapsulation’ packaging strategy, suggesting that the phosphor can be applied to high quality white light illumination. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Phosphors

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Achieving the strength and ductility synergy in the AlN/ZK60 Mg matrix composite with the bimodal structure

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Journal of Magnesium and Alloys 2025年

作者： Xu, Sinuo Sun, Chaoyang Li, Hongxiang Liu, Boyu Feng, Yinghao Wang, Chunhui Liu, Jingchen School of Mechanical Engineering University of Science and Technology Beijing Beijing100083 China Beijing Key Laboratory of Lightweight Metal Forming Beijing100083 China State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing100083 China

Overcoming the strength and ductility trade-off is conducive to expanding the application prospects of the Mg matrix composites. A new approach of using the master alloy containing particulate reinforcements to achieve the strength and ductility synergy in the Mg matrix composites was proposed, which can induce the grain size bimodal structure by regulating the dynamic recrystallization (DRX). Specifically, a novel AlN-Al master alloy was prepared via powder metallurgy to fabricate the AlN/ZK60 composite, and the effects of adding the AlN-Al master alloy on microstructure evolution related to the strength and ductility synergy in the composite were thoughtfully investigated, involving precipitation, grain size, and DRX behavior. The reaction between the Al in the master alloy and the Zr in the ZK60 Mg alloy suppressed the grain refinement, and the coarse grains were further formed after the solution treatment on the as-cast composite. Subsequently, deformation heterogeneity between the AlN and Mg matrix during the hot extrusion induced discontinuous dynamic recrystallization (DDRX) and promoted fine grain fraction. The combination formed the bimodal structure in the AlN/ZK60 composite, and coarse and fine grains acted as hard and soft zones, respectively, during the room temperature deformation. The hard zone was enhanced by the basal texture strengthening, and the ductility was improved due to the promotion of the basal 〈a〉 slipping in the soft zone, jointly leading to the strength and ductility synergy in the AlN/ZK60 composite for the ultimate tensile strength increased by ∼7.4 % while maintaining the same elongation compared with the ZK60 Mg alloy. © 2025

关键词： Grain refinement

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