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Morphology and valence state evolution of Cu:Unraveling the impact on nitric oxide electroreduction

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 Environmental Engineering University of Science and Technology BeijingBeijing 100083China

Ammonia(NH3)serves as a critical component in the fertilizer industry and fume gas ***,the conventional 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,given its exceptional NH3yield and ***,a crucial aspect that remains insufficiently explored is the effects of morphology and valence states of Cu on the NORR *** this investigation,we synthesized CuO nanowires(CuO-NF)and Cu nanocubes(Cu-NF)as cathodes through an in situ growth ***,CuO-NF exhibited an impressive 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,preserving their nanosheet cluster morphology,sustained by an abundant supply of subsurface oxygen(s-O)even 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 *** distinctive current-potential relationship,akin to a volcano-type curve,was attributed to distinct NO hydrogenation *** Tafel analysis revealed 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 driven by *** findings revealed the potential of CuO-NF for NO reduction and provided insights into the intricate interplay between crystal morphology,valence states,and electrochemical performance.

关键词： NORR Ammonia Synthesis Copper Morphology Valence States Mechanism

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Rational construction and decoration of Li_(5)Cr_(7)Ti_(6)O_(25)@Cnanofibers as stable lithium storage materials

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Journal of Energy Chemistry 2022年第8期31卷 400-410,I0011页

作者： ting-ting Wei Panpan Peng Yu-Rui Ji Yan-Rong Zhu ting-Feng yi ying Xie School of Materials Science and Engineering Northeastern UniversityShenyang 110819LiaoningChina Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080HeilongjiangChina School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004HebeiChina Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Qinhuangdao 066004HebeiChina

Li_(5)Cr_(7)Ti_(6)O_(25) is regarded as a promising anode material for Li-ion batteries(LIBs)because of its low cost and high theoretical ***,the inherently poor conductivity significantly limits the enhancement of its rate capability and cycling stability,especially at high current *** this work,we construct one-dimensional Li_(5)Cr_(7)Ti_(6)O_(25)/C nanofibers by electrospinning method to enhance the kinetic,which realizes high cycling *** coating enhances the structure stability,insertion/extraction reversibility of Li-ions and electrochemical reaction activity,and facilitates the transfer of *** from the unique architecture and component,the Li_(5)Cr_(7)Ti_(6)O_(25)/C(6.6 wt%)nanofiber shows an excellent rate capability with a reversible de-lithiation capacity of 370.8,290.6,269.2,254.3 and 244.9 m Ah g^(-1) at 200,300,500,800 and 1000 m A g^(-1),*** at a higher current density of 1 A g^(-1),Li_(5)Cr_(7)Ti_(6)O_(25)/C(6.6 wt%)nanofiber shows high cycling stability with an initial de-lithiation capacity of 237.8 m Ah g^(-1) and a capacity retention rate of about 84%after 500 *** density functional theory calculation result confirms that the introduction of carbon on the surface of Li_(5)Cr_(7)Ti_(6)O_(25) changes the total density of states of Li_(5)Cr_(7)Ti_(6)O_(25),and thus improves electronic conductivity of the composite,resulting in a good electrochemical performance of Li_(5)Cr_(7)Ti_(6)O_(25)/C ***_(5)Cr_(7)Ti_(6)O_(25)/C nanofibers indicate a great potential as an anode material for the next generation of high-performance LIBs.

关键词： Lithium-ion battery Anode Li_(5)Cr_(7)Ti_(6)O_(25) Electrospinning Nanofibers

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Synthesis and Thermal Behavior of 1,8-Dihydroxy- 4,5-dinitroanthraquinone Manganese Salt

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Chemical Research in Chinese Universities 2014年第3期30卷 468-471页

作者： wang yinglei ZHAO Fengqi JI Yueping yi Jianhua wang Wei XU Siyu AN ting PEI Qing Science and Technology on Combusition and Explosion Laboratory Xi 'an Modern Chemistry Research Institute Xi 'an 710065 P. R. China

A novel energetic combustion catalyst, 1,8-dihydroxy-4,5-dinitroanthraquinone manganese salt （DHDNEMn）, was synthesized by virtue of the metathesis reaction in a yield of 91%, and its structure was characterized by IR, element analysis and differential scanning calorimetry（DSC）. The thermal decomposition reaction kinetics was studied by means of different heating rate DSC. The results show that the apparent activation energy and pre-exponential factor of the exothermic decomposition reaction of DHDNEMn obtained by Kissinger＇s method are 162.3 kJ/mol and 1011.8 s^-1, respectively. The kinetic equation of major exothermic decomposition reaction of DHDNEMn is dα/dT= 10^118/β 2/5（1-α）[-ln（1-α）[-ln（1-α）]^3/5 exp（-1.623×10^5/RT）. The entropy of activation（△S^≠）, enthalpy of activation（△H^≠） and free energy of activation（A△G^≠） of the first thermal decomposition are -24.49 J·mol^-1·K^-1, 185.20 kJ/mol and 199.29 kJ/mol（T=575.5 K）, respectively. The self-accelerating decomposition temperature（TSADT） and critical temperature of thermal explosion（Tb） are 562.9 and 580.0 K, respectively. The above-mentioned information on the thermal behavior is quite useful for analyzing and evaluating the stability and thermal safety of DHDNEMn.

关键词： Manganese salt of 1,8-dihydroxy-4,5-dinitroanthraquinone Thermal behavior Energetic combustion catalyst

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Pancreatic paraganglioma with multiple lymph node metastases found by spectral computed tomography: A case report and review of the literature

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World Journal of Clinical Cases 2022年第31期10卷 11638-11645页

作者： ting Li Rong-Qi yi Gang Xie Dan-Ni wang yi-Tao Ren Kang Li Department of Medical Imaging North Sichuan Medical CollegeNanchong 637000Sichuan ProvinceChina Department of Radiology Chongqing General HospitalChongqing 401147China Department of Medical Imaging Chongqing Medical UniversityChongqing 400016China

BACKGROUND Primary pancreatic paraganglioma is exceedingly *** patients with pancreatic paraganglioma lack a typical clinical presentation,and the tumor is difficult to accurately differentiate from other pancreatic neuroendocrine tumors,making the misdiagnosis rate extremely *** excision is the primary treatment modality but is considered high *** of its rich vascularity,the tumor easily bleeds during surgery,especially malignant paragangliomas invading large blood ***,a thorough preoperative evaluation of the tumor is ***,we report a primary malignant pancreatic paraganglioma,the second such case in a young patient that was successfully resected *** SUMMARY A 26-year-old female patient was admitted to the hospital with unexplained abdominal ***-layer spectral-detector computed tomography(DLCT)revealed a mixed density mass in the pancreatic body and *** patient was transferred to our hospital after previous failed surgical resection at other *** patient and her family strongly desired *** a thorough preoperative evaluation and adequate preparation,a large mass with the greatest dimension of 8.0 cm was successfully *** final pathological diagnosis was malignant *** patient was discharged in good condition 2 wk *** The rare malignant pancreatic paraganglioma reported here was difficult to diagnose *** filling of the draining vein may be a crucial diagnostic imaging *** can provide more precise information for surgical resection through dual-energy imaging.

关键词： Spectral computed tomography Pancreas Paraganglioma Lymph node metastasis Case report

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The Relationship between the Rise Width and the Full Width of γ-ray Burst Pulses and Its Implications

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Chinese Journal of Astronomy and Astrophysics 2006年第1期6卷 52-60页

作者： Rui-Jing Lu yi-Ping Qin ting-Feng yi National Astronomical Observatories/Yunnan Observatory Chinese Academy of Sciences Kunming 650011 Department of Physics Guangxi University Nanning Guangxi 530004 Graduate University of Chinese Academy of Sciences Beijing 100049

We investigate the relationship between the rise width and the full width of gamma-ray burst pulses. Theoretical analysis shows that either width is proportional to Г^-2△τθ,FWHMRc/c（Г the Lorentz factor of the bulk motion, △τθ,FWHM a local pulse＇s width, Rc the radius of fireballs and c the velocity of light）. We study the relationship for four samples of observed pulses. We find：（1） merely the curvature effect could reproduce the relationship between the rise and full widths with the same slope as derived from the model of Qin et al.; （2） gamma-ray burst pulses, selected from both the short and long GRBs, follow the same sequence in the rise width vs. full width diagram, with the shorter pulses at one end; （3） all GRBs may intrinsically result from local Gaussian pulses. These features place constraints on the physical mechanism（s） for producing long and short GRBs.

关键词： gamma rays: bursts - gamma rays: theory methods: data analysis

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PPy-Encapsulated Na_(2)Li_(2)Ti_(6)O_(14) Composites as High-Performance Anodes for Li-Ion Battery

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Acta Metallurgica Sinica(English Letters) 2022年第11期35卷 1873-1881页

作者： Fan-Fan wang Nan Zhang Ze-Chen Lv Yan-Rong Zhu Jun-Hong Zhang ting-Feng yi School of Materials Science and Engineering Northeastern UniversityShenyang 110819China Shandong Provincial Key Laboratory of Chemical Energy Storageand Novel Cell Technology Collegeof Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng 252059China School of Resources and Materials Northeastern University atQinhuangdaoQinhuangdao 066004China KeyLaboratory of Dielectric and Electrolyte Functional Material Hebei Province Qinhuangdao 066004China

Na_(2)Li_(2)Ti_(6)O_(14) as a reliable anode material is becoming a hopeful candidate for Li-ion ***,the pristine Na_(2)Li_(2)Ti_(6)O_(14) usually suffer from bad rate performance and poor cycling stability under high current due to limited diffusion kinetics and poor electrical ***,the PPy-coated Na_(2)Li_(2)Ti_(6)O_(14) composites are successfully obtained via the solid-state method and followed by chemical oxidation process in the first *** results of tests prove that the Na_(2)Li_(2)Ti_(6)O_(14)@PPy composites have better electrochemical performance than the bare Na_(2)Li_(2)Ti_(6)O_(14) because of the excellent electrical conductivity and the special macromolecular architecture of *** particular,the Na_(2) Li_(2) Ti_(6) O_(14) @PPy(4 wt%)exhibits excellent charge capacities of about 223.2,218.0,200.8,184.3 and 172.6 mAh g^(-1) at 50,100,200,300 and500 mA g^(-1),respectively,revealing the best rate capability of all electrode *** Na_(2)Li_(2)Ti_(6)O_(14)@PPy(4 wt%)not only has the highest charge capacity under 0.5 mA g^(-1),but also has the highest capacity retention of 85.12%among all samples after 100 ***,the PPy coating is known as a promising way to improve the electrochemical property of Na_(2)Li_(2)Ti_(6)O_(14).The PPy-coated Na_(2)Li_(2)Ti_(6)O_(14) demonstrates the great prospect as promising negative materials for Li-ion batteries.

关键词： Li-ion battery Anode material Na_(2)Li_(2)Ti_(6)O_(14) PPy coating Electrochemical property

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Tuning interface mechanism of FeCo alloy embedded N,S-codoped carbon substrate for rechargeable Zn-air battery

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Journal of Energy Chemistry 2024年第6期93卷 400-410,I0010页

作者： Hui Chang Lulu Zhao Shan Zhao Zong-Lin Liu Peng-Fei wang ying Xie ting-Feng yi School of Materials Science and Engineering Northeastern UniversityShenyang 110819LiaoningChina Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080HeilongjiangChina Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province School of Resources and MaterialsNortheastern University at QinhuangdaoQinhuangdao 066004HebeiChina

The interface mechanism between catalyst and carbon substrate has been the focus of *** this paper,the FeCo alloy embedded N,S co-doped carbon substrate bifunctional catalyst(FeCo/S-NC)is obtained by a simple one-step pyrolysis *** experimental results and density functional theory(DFT)calculation show that the formation of FeCo alloy is conducive to promoting electron transfer,and the introduction of S atom can enhance the interaction between FeCo alloy and carbon substrate,thus inhibiting the migration and agglomeration of particles on the surface of carbon *** FeCo/SNC catalysts show outstanding performance for oxygen reduction reaction(ORR)and oxygen evolution reaction(OER).FeCo/S-NC shows a high half-wave potential(E_(1/2)=0.8823 V)for ORR and a low overpotential at 10 mA cm^(-2)(E_(j=10)=299 mV)for *** addition,compared with Pt/C+RuO_(2) assembled Zn-air battery(ZAB),the FeCo/S-NC assembled ZAB exhibits a larger power density(198.8 mW cm^(-2)),a higher specific capacity(786.1 mA h g_(zn)~(-1)),and ultra-stable cycle *** results confirm that the optimized composition and the interfacial interaction between catalyst and carbon substrate synergistically enhance the electrochemical performance.

关键词： FeCo alloy N S co-doped carbon DFT calculation Zn-air batteries Interfacial interaction

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Effect of Ti content on microstructure and properties of TixZrVNb refractory high-entropy alloys

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International Journal of Minerals,Metallurgy and Materials 2020年第10期27卷 1318-1325页

作者： Tian-dang Huang Shi-yu Wu Hui Jiang yi-ping Lu Tong-min wang ting-ju Li Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China College of Mechanical and Electronic Engineering Shandong University of Science and TechnologyQingdao 266590China

This study aimed to investigate the microstructure and mechanical properties of TixZrVNb(x=1,1.5,2)refractory high-entropy alloys at room and elevated *** TiZrVNb alloy consisted of the body-centered cubic(bcc)matrix with a small amount of V2Zr *** Ti1.5ZrVNb and Ti2ZrVNb alloys exhibited a single-phase bcc *** room temperature,the tensile ductility of the as-cast alloys increased from 3.5%to 12.3%with the increase in the Ti *** TixZrVNb alloys exhibited high yield strength at 600°C,and the ultimate yield strength was more than 900 *** occurred at 800°C,but the ultimate yield strength could still exceed 200 ***,the TixZrVNb alloys displayed low densities but high specific yield strengths(SYSs).The lowest density of TixZrVNb alloys was only 6.12 g/cm^3,but the SYS could reach about 180 MPa·cm^3·g^−1,which is better than those of most reported high-entropy alloys(HEAs).

关键词： high-entropy alloys mechanical properties low density elevated temperature

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Novel as-cast AlCrFe2Ni2Ti0.5 high-entropy alloy with excellent mechanical properties

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International Journal of Minerals,Metallurgy and Materials 2020年第10期27卷 1312-1317页

作者： Cheng-bin Wei Xing-hao Du yi-ping Lu Hui Jiang ting-ju Li Tong-min wang Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China School of Materials Science and Engineering Shenyang Aerospace UniversityShenyang 110136China College of Mechanical and Electronic Engineering Shandong University of Science and TechnologyQingdao 266590China

We designed a novel Co-free AlCrFe2Ni2Ti0.5 high-entropy alloy(HEA)that features an excellent combination of strength and ductility in this *** as-cast AlCrFe2Ni2Ti0.5 alloy showed equiaxed grains undergoing spinodal decomposition,which consisted of ultrafine-grained laminated body-centered cubic(bcc)phases and an ordered body-centered cubic(b2)phase,and some precipitates embedded in the b2 *** bcc and b2 phases also feature a coherent *** unique structure impedes mobile dislocations and hinders the formation of cracks,thereby giving the AlCrFe2Ni2Ti0.5 HEA both high strength and *** room temperature,the as-cast AlCrFe2Ni2Ti0.5 alloy exhibited a compressive yield strength of 1714 MPa,an ultimate strength of 3307 MPa,and an elongation of 43%.These mechanical properties are superior to those of most reported HEAs.

关键词： high-entropy alloys mechanical properties coherent interface spinodal structure

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Hierarchy and subsurface correlation of muddy baffles in lacustrine delta fronts： a case study in the X Oilfield, Subei Basin, China

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Petroleum Science 2018年第3期15卷 451-467页

作者： Kun Qi Xiao-Ming Zhao Li Liu yi-Qing Su Hua wang Cheng-Peng Tan yi-ting Sun State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University Chengdu 610500 Sichuan China School of Geoscience and Technology Southwest Petroleum University Chengdu 610500 Sichuan China School of Geoscience Yangtze University Wuhan 430100 Hubei China PetroChina Southwest Oil and Gasfield Company Chengdu 610500 Sichuan China

Muddy baffles are one of the major geological factors controlling the underground fluid flow as well as the remaining oil distribution. This study used detailed drilling data from the E1f1 reservoir in the X Oilfield, Subei Basin, China, to investigate the hierarchical muddy baffles developed on lacustrine delta fronts and their precise cross-well *** to the theories on allogenic and autogenic cycles as well as the genesis and scales of muddy baffles, five orders of muddy baffles were classified, which provided various degrees of difficulty when attempting interwell correlation. Under the guidance of a reliable stratigraphic model, the precise cross-well correlation of muddy baffles could be achieved and the key point of establishment of this stratigraphic model was to calculate foreset angles of hierarchical muddy baffles during deposition. During calculation, the relationships between sediment flow direction, higher-order strata dipping direction,well types and well trajectory direction should all be taken into consideration and some other angles（referred to here as θ1,θ2 and θ3） should also be measured. Such new methods of cross-well correlation for hierarchical muddy baffles could greatly reduce the uncertainties and multiple solutions, which in turn would be significant for efficient development and oil recovery enhancement in the reservoirs.

关键词： Delta front muddy Baffle Genetic analysis Hierarchy division Strata correlation

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