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Nanostructured Pt@RuO_(x) catalyst for boosting overall acidic seawater splitting

Chinese Journal of Structural Chemistry 2024年第1期43卷 6-15页

作者： Zimo Peng Quan Zhang Gaocan Qi Hao Zhang Qian Liu Guangzhi Hu Jun Luo Xijun Liu Institute for New Energy Materials&Low-Carbon Technologies School of Materials Science and EngineeringTianjin University of TechnologyTianjin300384China School of Materials Science and Engineering Tianjin University of TechnologyTianjin 300384China Institute for Advanced Study Chengdu UniversityChengdu610106China Institute for Ecological Research and Pollution Control of Plateau Lakes School of Ecology and Environmental ScienceYunnan UniversityKunming650091China ShenSi Lab Shenzhen Institute for Advanced StudyUniversity of Electronic Science and Technology of ChinaLonghua DistrictShenzhen518110China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsMOE Key Laboratory of New Processing Technology for Nonferrous Metals and MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning530004China

In the domain of acidic water splitting,designing bifunctional catalysts that marry high activity with enduring stability is a formidable ***,we have constructed platinum-containing ruthenium oxide nanoparticles(Pt@RuO_(x)NPs)to achieve excellent overall water splitting performance in acidic ***@RuO_(x)NPs demonstrate exceptional catalytic activity for both the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)in acidic seawater,requiring overpotentials of only 20 and 157 mV,respectively to achieve a current density of 10 mA cm^(-2).Furthermore,in 0.5 M H_(2)SO_(4),this catalyst exhibits high HER(19 mV)and OER(236 mV)catalytic *** two-electrode water splitting system composed of bifunctional Pt@RuO_(x)NPs requires cell voltages of only 1.442 and 1.465 V to deliver a current density of 10 mA cm^(-2)in acidic seawater and 0.5 M H_(2)SO_(4).Remarkably,this catalyst displays remarkable stability in the water splitting *** is shown that the introduction of Pt could augment oxygen vacancies and enhance catalytic activity *** synergy between Pt and Ru further contributes to the improved ***,we have observed that acidic seawater holds distinct advantages for acidic water splitting,along with a thorough exploration of the relationship between Cl^(-)concentration and catalytic *** study not only provides a strategy to improve the catalytic activity and stability of ruthenium-based catalysts for water splitting in acidic environments,but also unveils the promoting effect of Cl^(-)on the catalytic activity in acidic water splitting.

关键词： Acidic water splitting Bifunctional catalysts Pt@RuOx nanoparticles Synergistic effect

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Integrating thin wall into block:A new scanning strategy for laser powder bed fusion of dense tungsten

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Journal of materials Science & technology 2022年第25期120卷 167-171页

作者： Zhengang Xiong Ji Zou Zhaoyang Deng Jinhan Chen Wei Liu Yuchi Fan Minshi Wang Xiaoqing Zhao Chunfeng Yu Dongdong Dong Wenyou Ma Weimin Wang Zhengyi Fu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Institute of New Materials Guangdong Academy of SciencesGuangzhou 510650China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Institute of Functional Materials Donghua University201620China School of Metallurgy and Materials University of BirminghamBeijing 100084China

Due to a combination of outstanding properties including high melting point,high density,low thermal expansion coefficient,low saturated vapor pressure and excellent thermal conductivity,tungsten(W)parts have been widely used as electrodes,heating elements,anti-scatter grids for Computed Tomography(CT)equipment,rocket nozzles and divertor materials for nuclear fusion[1].

关键词： powder thermal saturated

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CO_(2) adsorption and activation on p-block catalyst Ga_(2)O_(3)

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Science China materials 2025年第2期68卷 590-596页

作者： Zhizhuang Liu Xiaoxu Kuang Baowen Li Chenghua Sun Rong Tu Song Zhang Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou 521000China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China Department of Chemistry and Biotechnology Swinburne University of TechnologyHawthornVictoria 3122Australia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

The fixation and conversion of CO_(2)frommedium-and high-temperature industrial exhaust gases arescientifically important and challenging tasks owing to theharsh conditions ***_(2)O_(3),a stable p-block compound,is surprisingly active in the thermal conversion of hot CO_(2)waste gas,but its underlying mechanism remains *** study,we investigated CO_(2)adsorption and activationacross 11 different Ga_(2)O_(3)-terminated faces using densityfunctional *** transfer and chemical bond analysesrevealed the occurrence of two distinct activation mechanismsinvolving synchronous electron gain and loss,driven by astrong synergetic effect between Ga cations and O anions onthe substrate *** Ga-O synergy enhances the CO_(2)activation efficiency compared with single active sites,with CO_(2)^(δ+) cation more readily capturing H atom than CO_(2)^(δ–).Tothe best of our knowledge,such a dual activation mechanismhas not been reported before,particularly for p-block *** findings provide new insights into the direct catalyticconversion of CO_(2)emissions and offer strategies for the rational design of industrial-grade catalysts for medium-andhigh-temperature CO_(2)tail gas conversion.

关键词： p-block catalyst gallium oxide carbon dioxide density functional theory synergetic mechanism

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Microstructure evolution during hydrogen pre-sintering of (Tb0.7Lu0.3)2O3 transparent ceramics 17

Microstructure evolution during hydrogen pre-sintering of (T...

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17th National Conference on Laser technology and Optoelectronics

作者： Xin, Yu Xu, Tao Wang, Yaozhi Luo, Peng Zhao, Wenhai Kang, Bin Jing, Wei Mei, Bingchu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Institute of Chemical Materials China Academy of Engineering Physics Mianyang621900 China

ISBN: (纸本)9781510661097

(Tb0.7Lu0.3)2O3 transparent ceramics were prepared by hydrogen pre-sintering and hot isostatic pressing treatment. ZrO2 was added as sintering aid to restrain the abnormal grain growth. The microstructure evolution and linear shrinkage changes of the (Tb0.7Lu0.3)2O3 transparent ceramics in the range of 1400℃~1700℃ were investigated. It can be seen from the results that the linear shrinkage of ceramics increased nonlinearly with the increase of the sintering temperature. In the range of 1550℃~1600℃, the (Tb0.7Lu0.3)2O3 ceramics had a higher shrinkage rate. And the shrinkage rate slowed down when the temperature exceeded 1600℃. The samples prepared by 1550℃ hydrogen pre-sintering combined with 1550℃ hot isostatic pressing sintering showed good optical property. The average grain size was about 1.69μm and the highest transmittance reached 74.81% @1064 nm. © 2022 SPIE.

关键词： Hydrogen

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BaTiO_(3)/Polyurethane Dielectric Composites with Diels-Alder Bond for Improved Self-Healing Properties

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Journal of Renewable materials 2022年第9期10卷 2355-2364页

作者： unlong Yao Wei Nie Zhengguang Sun Huan Yang Yu Guan Lin Gao Xueliang Jiang Mujie Guo Chuanxi Xiong Hubei Key Laboratory of Plasma Chemistry and Advanced Materials School of Materials Science and EngineeringWuhan Institute of TechnologyWuhan430205China Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei UniversityWuhan430062China Key Laboratory of Green Chemical Engineering Process of Ministry of Education Wuhan Institute of TechnologyWuhan430205China School of Chemistry and Environmental Engineering Jianghan UniversityWuhan430056China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and EngineeringWuhan University of TechnologyWuhan430070China

In general,self-healing dielectric composites are mainly composed of polar hydrogen bonds,which have high hydrophilicity and are unsuitable for humid *** composite with Diels-Alder(D-A)bond contains covalent bonds,it can be adopted as an efficient self-healing ***,we construct self-healing barium titanate(BT)/polyurethane(PU)dielectric composites by adopting PU with D-A bond as matrix(BT/PU-DA).The prepared 10%BT/PU-DA composite exhibits superior self-healing ability than that of ***,its dielectric constant can reach 9.3 with a loss of only 0.04 at 1000 Hz and maintain 93%repair efficiency of tensile *** experimental analysis suggests the introduction of D-A bond can enhance the thermostability and self-healing ability of BT/PU-DA *** addition,the incorporation of BT nanoparticles and D-A bond in the self-healing composite contributes to the lower dielectric loss and excellent tensile strength after *** adopted strategy is a promising and facile approach to develop highly efficient selfhealing dielectric material,which will be conducive to reuse and sustainable development of the electronic packaging material in aqueous medium or wet environment.

关键词： Diels-Alder bond self-healing dielectric properties tensile strength polyurethane

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Deep-learning enabled atomic insights into the phase transitions and nanodomain topology of lead-free(K,Na)NbO_(3) ferroelectrics

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Science China materials 2024年第9期67卷 3029-3038页

作者： Xu Zhang Bei Li Ji Zou Hanxing Liu Ben Xu Kai Liu School of Materials Science and Engineering Research Center for Materials Genome EngineeringWuhan University of TechnologyWuhan430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China International School of Materials Science and Engineering Wuhan University of TechnologyWuhan430070China Graduate School China Academy of Engineering PhysicsBeijing100193China

Lead-free K_(x)Na_(1-x)NbO_(3)(KNN)perovskites have garnered increasing attention due to their exceptional ferropiezoelectric properties,which are effectively tuned via polymorphic structures and domain ***,atomic insights into the underlying nanomechanisms governing the ferroelectricity of KNNs amidst varying factors such as composition,phase,and domain are still ***,we perform molecular dynamics simulations of phase transitions and domain dynamics for KNNs with various K/Na ratios(x=0.25∼1.0)by using ab-initio accuracy deep learning potential(DP).As a demonstration of its transferability,the newly developed DP model shows quantum accuracy in terms of the equation of states,elastic constants,and phonon dispersion relations for various KNbO_(3)and K_(0.5)Na_(0.5)NbO_(3).Furthermore,intricate temperature-dependent phase transitions and domain formation of KNNs are extensively and quantitatively *** indicate that for KNNs with compositions x ranging from 0.25 to 1.0,the paraelectric-to-ferroelectric phase transition of KNNs is driven primarily by the order-disorder effect,while the displacive effect is dominant in the subsequent ferroelectric phase ***,flux-closure or herringbone-like nanodomain patterns arranged with 90°domain walls formed close to the experimental *** analyses reveal that favorable 90°domain wall formation becomes more challenging with increasing Na content due to distinct oxygen octahedron distortion arising from the different ionic radii of K/Na *** is envisioned that the combination of unified DP and atomistic simulations will help offer a robust solution for more accurate and efficient in silico explorations of complex structural,thermodynamic,and ferroelectric properties for relevant energy storage and conversion materials.

关键词： KNN molecular dynamics deep potential phase transitions domain dynamics

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High Conduction Band Inorganic Layers for Distinct Enhancement of Electrical Energy Storage in Polymer Nanocomposites

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Nano-Micro Letters 2022年第9期14卷 221-236页

作者： Yingke Zhu Zhonghui Shen Yong Li Bin Chai Jie Chen Pingkai Jiang Xingyi Huang Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing State Key Laboratory of Metal Matrix CompositesDepartment of Polymer Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and DevicesWuhan University of TechnologyWuhan 430070People’s Republic of China Institute of Applied and Physical Chemistry and Center for Environmental Research and Sustainable Technology University of Bremen28359 BremenGermany

Dielectric polymer nanocomposites are considered as one of the most promising candidates for high-power-density electrical energy storage *** nanofillers with high insulation property are frequently introduced into fluoropolymer to improve its breakdown strength and energy storage ***,inorganic nanofillers are thought to introducing traps into polymer matrix to suppress leakage ***,how these nanofillers effect the leakage current is still ***,high dopant(>5 vol%)is prerequisite for distinctly improved energy storage performance,which severely deteriorates the processing and mechanical property of polymer nanocomposites,hence brings high technical complication and ***,boron nitride nanosheet(BNNS)layers are utilized for substantially improving the electrical energy storage capability of polyvinylidene fluoride(PVDF)*** reveal that the high conduction band minimum of BNNS produces energy barrier at the interface of adjacent layers,preventing the electron in PVDF from passing through inorganic layers,leading to suppressed leakage current and superior breakdown *** by improved Young’s modulus(from 1.2 GPa of PVDF to 1.6 GPa of nanocomposite),significantly boosted discharged energy density(14.3 J cm^(-3)) and charge-discharge efficiency(75%)are realized in multilayered nanocomposites,which are 340 and 300% of PVDF(4.2 J cm^(-3),25%).More importantly,thus remarkably boosted energy storage performance is accomplished by marginal *** work offers a new paradigm for developing dielectric nanocomposites with advanced energy storage performance.

关键词： Boron nitride nanosheet Conduction band Efficiency Energy density Barrier

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Aqueous batteries:from laboratory to market

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国家科学评论（英文版） 2023年第11期10卷 85-88页

作者： Xikun Zhang Pengcheng Xing Thomas L.Madanu Jing Li Jie Shu Bao-Lian Su Laboratory of Inorganic Materials Chemistry(CMI) University of NamurBelgium School of Materials Science and Chemical Engineering Ningbo UniversityChina Laboratory of Inorganic Materials Chemistry(CMI) University of NamurBelgium State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyChina

As estimated up to 2022,global installed capacity of lithium-ion batteries(LIBs)has increased dramatically from 148 to 580 GWh in the past five *** wide range of applications is mainly at-tributed to their high energy density,ex-cellent cycle life,and low self-discharge rate[1].However,with the continuous promotion of the applications in various fields,the limitations of LIBs have be-come apparent,such as high cost and safety issues.

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Stretchable wireless optoelectronic synergistic patches for effective wound healing

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npj Flexible Electronics 2024年第1期8卷 233-242页

作者： Qian Wang Siyuan Cai Guang Yao Liyuan Zhang Wenhao Lou Youxin Chen Qingqing Li Maowen Xie Xingyi Gan Chenzheng Zhou Taisong Pan Min Gao Kangning Zhao Zhen Cai Yuan Lin School of Materials and Energy University of Electronic Science and Technology of ChinaChengduSichuanChina Department of Plastic Surgery Sichuan Provincial People’s HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuanChina Department of Plastic and Cosmetic Surgery Xinqiao HospitalArmy Medical UniversityChongqingChina State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengduSichuanChina Shenzhen Institute for Advanced Study University of Electronic Science and Technology of ChinaShenzhenGuangdongChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhanHubeiChina Medico-Engineering Cooperation on Applied Medicine Research Center University of Electronic Science and Technology of ChinaChengduSichuanChina

Physiotherapies play a crucial role in noninvasive tissue engineering for wound ***,challenges such as the implementation of complex interventions and unsatisfactory treatment outcomes impede widespread ***,we proposed a stretchable and wirelessly-powered optoelectronic synergistic patch with a dual-layer serpentine wireless receiver circuit to drive the optoelectronic modulation *** structure and impedance matching enable the patch to seamlessly attach to irregular skin surfaces and operate robustly over a 30%tensile strain *** on Sprague-Dawley rat wound *** wound closure rate of the optoelectronic synergistic group significantly outperformed both monointervention and blank control ***,optoelectronic synergistic intervention enhances the secretion of vascular endothelial marker proteins and growth factors,and stabilizes mitochondrial function during oxidative ***,the scalable amalgamation of flexible electronics,wireless transmission,and synergistic interventions promise to improve wound care.

关键词： optoelectronic synergistic healing

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Mechanisms of crack elimination in directed energy deposited MAR M247 superalloy and effects of laser power on microstructural evolution and mechanical properties

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materials Today Communications 2025年 46卷

作者： Chen, Mingzhang Liu, Xunchen Wang, Yitong Hua, Lin Hu, Zeqi School of Automotive Engineering Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan430070 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan430070 China

MAR M247 is a directionally solidified nickel-based superalloy with excellent high-temperature performance, but it suffers from severe cracking issues during the directed energy deposition (DED) process. Currently, much of the research on crack suppression in nickel-based superalloy has focused on IN738 and Hastelloy X, with limited studies specifically addressing the cracking suppression mechanisms for M247. This study investigates the mechanisms of crack elimination in M247 and the influence of laser power on its microstructural evolution and mechanical properties. Thermodynamic calculations indicate that M247 has higher crack sensitivity indices than IN718 and IN738, making crack suppression a critical challenge. By optimizing DED process parameters, particularly by reducing scan speed and increasing laser power, cracks were effectively eliminated. Numerical simulations reveal that these adjustments reduce thermal stress accumulation, thereby mitigating cracking. Microstructural characterization shows that increasing laser power minimizes internal defects, promotes a trend toward oriented grain growth, decreases transverse grain boundaries perpendicular to the deposition direction, reduces disorientation, promotes texture evolution, and increases Schmid factors. While tensile strength and microhardness remain largely unaffected, ductility is significantly improved. This paper provides valuable insights into crack elimination and mechanical property enhancement in additive manufactured nickel-based superalloy. © 2025 Elsevier Ltd

关键词： Tensile strength

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