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1Experimental measurement of the electrical conductivity of single crystal olivine at high temperature and high pressure under different oxygen fugacities显示文摘At 1.0-4.0 GPa and 1123-1473 K and under oxygen fugacity-controlled conditions (Ni + NiO, Fe + Fe3O4, Fe + FeO and Mo+ M0O2 buffers), a YJ-3000t Model six-anvil solid high-pressure apparatus and a Sarltron-1260 Impedance/Gain-Phase analyzer were employed to conduct an in situ measurement of the electrical conductivity of single crystal olivine. Experimental results showed that: (1) within the range of experimentally selected frequencies (103-106 Hz), the electrical conductivity of the sample is of great dependence on the frequency; (2) with the rise of temperature ( T), the electrical conductivity (σ) will increase, and the Arrenhius linear relationship is established between lgσ and 1/T; (3) under the control of oxygen buffer Fe+ Fe3O4, with the rise of pressure, the electrical conductivity tends to decrease whereas the activation enthalpy and independent-of-temperature preexponential factor tend to increase, with the activation energy and activation volume of the sample estimated at (1. 25 ± 0.08) eV and (0.105 ±0.025) cm3/mol, respectively; (4) under given pressure and temperature conditions, the electrical conductivity tends to increase whereas the activation energy tends to decrease with increasing oxygen fugacity; and ( 5) the mechanism of electrical conduction of small polarons can provide insight into the behavior of electrical conduction of olivine under high pressure and high temperature.DAI Lidong LI Heping LIU Congqiang CUI Tongdi SHAN Shuangming YANG Changjun LIU Qingyou DENG Heming 2006Progress in Natural Science:Materials International2006,16,4:9
2In situ trapped high-density single metal atoms within graphene: Iron-containing hybrids as representatives for efficient oxygen reduction显示文摘因为他们为特殊催化作用的效率和 chemoselectivity 比传统的催化剂的那些优异,原子地驱散的催化剂在精力变换应用吸引了注意。然而,他们在支持上由于极其低的装载金属的内容有限制,在在高温度的金属地点和数量以及低稳定性的精确控制的困难。我们经由葡萄糖, dicyandiamide,和无机的金属盐的单个步的热热分解准备了一个高度做的单个金属原子混血儿。高角度的环形的黑暗扫描地的传播电子显微镜学(HAADF 茎) 和 X 光检查吸收罚款结构光谱学(XAFS ) 表明做进 graphene 矩阵的氮原子为由产生 metal-Nx 协作结构的金属原子稳定是枢轴的。由于 graphene 矩阵的强壮的抛锚效果,装载内容的金属是在孤立的原子混血儿的超过 4 wt.%( 磅内容象在做磅的混血儿的 9.26 wt.% 一样高) 。而且,单个做铁的混血儿(做 Fe@N 的 graphene ) 为氧减小反应显示出显著 electrocatalytic 表演。山峰力量密度是 199Daobin Liu Chuanqiang Wu Shuangming Chen Shiqing Ding Yaofeng Xie Changda Wang Tao Wang Yasir A. Haleem Zia ur Rehman Yuan Sang Qin Liu Xusheng Zheng Yu Wang Binghui Ge Hangxun Xu Li Song 2018Nano Research2018,11,4:6
3Hydriding Pd cocatalysts: An approach to giant enhancement on photocatalytic CO2 reduction into CH4显示文摘进高增值 CH 4 的公司 2 的 Photocatalytic 减小是精力和环境危机的一个有希望的解决方案。与 cocatalysts 集成半导体能为 photocatalytic 公司 2 减小改进这些活动;然而,大多数金属 cocatalysts 主要生产公司和 H 2 。此处,我们为显著地提高公司 2 的 photocatalytic 减小进 CH 4 报导一条 cocatalyst hydridation 途径。进 PdH 0.43 的 Hydriding Pd cocatalysts 在表演改进起了一个双作用。是由我们的同位素的标记实验揭示了, PdH 0.43 氢化物 cocatalysts 减少了 H 2 进化,它压制了 H 2 生产并且便于 CO 中介的变换进最后的产品:CH 4 。同时, hydridation 支持了在 cocatalysts 上套住的电子,改进充电分离。这条途径在 Pd 上从 3.2% ~ 63.6% 在 CH 4 生产增加了 photocatalytic 选择 { 100 } 并且从 15.6% ~ 73.4% 在 Pd 上 { 111 } 。结果提供卓见进 photocatalytic 机制研究并且为向 photocatalytic 公司 2 变换设计材料介绍新机会。Yuzhen Zhu Chao Gao Song Bai Shuangming Chen Ran Long Li Song Zhengquan Li Yujie Xiong 2017Nano Research2017,10,10:5
4Microstructure evolution of directionally solidifi ed Sn-16%Sb hyperperitectic alloy显示文摘The directionally solidifi ed microstructure of Sn-16%Sb hyperperitectic alloy has been investigated at various solidifi cation rates using a high-thermal gradient directional solidif ication apparatus. The results indicate that the solidifi cation microstructure consists of hard primary intermetallic SnSb phase embedded in a matrix of soft peritectic β-Sn phase. The primary SnSb phase exhibits faceted growth with tetragonal or trigonal shapes. At the same time, the primary SnSb phase is ref ined with an increase in the solidif ication rate and dispersed more uniformly in the matrix of β-Sn phase. The volume fraction of the SnSb phase fi rstly decreases and then increases when the solidif ication rate increases in directional solidif ication of Sn-16%Sb hyperperitectic alloy.Hu Xiaowu Li Shuangming Liu Lin Fu Hengzhi 2008China Foundry2008,5,3:4
5Experimental Study on the Electrical Conductivity of Orthopyroxene at High Temperature and High Pressure under Different Oxygen Fugacities显示文摘At presure 1.0–4.0 GPa and temperature 1073–1423 K and under oxygen partial pressure conditions, a YJ-3000t multi-anvil solid high-pressure apparatus and Sarltron-1260 Impedance/Gain-Phase analyzer were employed toconduct an in-situ measurement of the electrical conductivity of orthopyroxene. The buffering reagents consist of Ni+NiO,Fe+Fe3O4, Fe+FeO and Mo+MoO2 in order to control the environmental oxygen fugacity. Experimental results made clearthat: (1) within the measuring frequency range from 10? to 106 Hz, the complex impedance (R) is of intensive dependence 1on the frequency; (2) The electrical conductivity (σ) tends to increase along to the rise of temperature (T), and Log σ vs. 1/T fit the Arrenhius linear relations; (3) Under the control of oxygen buffer Fe+Fe3O4, with the rise of pressure, theactivation enthalpy tends to increase whereas the electrical conductivity tends to decrease. The activation energy andactivation volume of the main current carriers of orthopyroxene have been obtained, which are (1.715±0.035) eV and (0.03±0.01) cm3/mol, respectively; (4) Under given pressure and temperature, the electrical conductivity tends to increase withincreasing oxygen fugacity, while under given pressure the activation enthalpy tends to decrease with increasing oxygenfugacity; and (5) The sample’s small polarons mechanism has provided a reasonable explanations to the conductionbehavior at high temperature and high pressure.DAI Lidong LI Heping LIU Congqiang SHAN Shuangming CUI Tongdi SU Genli 2005Acta Geologica Sinica(English Edition)2005,79,6:4
6Solidification microstructure selection of the peritectic Nd-Fe-B alloys显示文摘Bridgman directional solidification and laser remelting experiments were carried out on Nd11.76Fe82.36B5.88 and Nd13.5Fe79.75B6.75 alloys.Microstructure evolutions along with solidification parameters(temperature gradient G,growth velocity V and initial alloy composition C0)were investigated.A solidification microstructure selection map was established,based on the consideration of solidification characteristics of peritectic T1 phase.In Bridgman directional solidification experiments,with the increasing growth velocities,the morphology of T1 phase changed from plane front or faceted plane front to dendrites.In laser remelting experiments,a transition from primary γ-Fe dendrites to T1 dendrites was found.Theoretical predictions are in good agreement with experimental results.ZHONG Hong LI ShuangMing LüHaiYan LIU Lin ZOU GuangRong FU HengZhi 2007Science China(Physics,Mechanics & Astronomy)2007,50,4:4
7Effect of sample diameter on primary and secondary dendrite arm spacings during directional solidification of Pb-26wt.%Bi hypo-peritectic alloy显示文摘The microstructure scales of dendrites,such as primary and secondary dendrite arm spacings,control the segregation profiles and the formation of secondary phases within interdendritic regions,which determine the properties of solidified structures.Investigations on primary and secondary dendrite arm spacings of primary α-phase during directionally solidified Pb-26wt%Bi hypo-peritectic alloy were carried out in this research,and systematic studies were conducted using cylindrical samples with different diameters(Φ = 1.8 and 7.0 mm) in order to analyze the effects of sample diameter on the primary and secondary dendrite arm spacings.In this work,the dependence of dendrite arm spacings on growth velocity was established.In addition,the experimental data concerning the primary and secondary dendrite arm spacings were compared with the main predictive dendritic models from the literatures.A comparison between experimental results for dendrite arm spacings of the 1.8-mm-diameter sample and 7.0-mm-diameter sample was also conducted.HU Xiaowu YAN Hong CHEN Wenjing LI Shuangming FU Hengzhi 2011Rare Metals2011,30,4:2
8Vacancy manipulating of molybdenum carbide MXenes to enhance Faraday reaction for high performance lithium-ion batteries显示文摘“Intrinsic”strategies for manipulating the local electronic structure and coordination environment of defect-regulated materials can optimize electrochemical storage performance.Nevertheless,the structure–activity relationship between defects and charge storage is ambiguous,which may be revealed by constructing highly ordered vacancy structures.Herein,we demonstrate molybdenum carbide MXene nanosheets with customized in-plane chemical ordered vacancies(Mo_(1.33)CT_(x)),by utilizing selective etching strategies.Synchrotron-based X-ray characterizations reveal that Mo atoms in Mo1.33CTx show increased average valence of+4.44 compared with the control Mo_(2)CT_(x).Benefited from the introduced atomic active sites and high valence of Mo,Mo_(1.33)CT_(x)achieves an outstanding capacity of 603 mAh·g^(−1)at 0.2 A·g^(−1),superior to most original MXenes.Li+storage kinetics analysis and density functional theory(DFT)simulations show that this optimized performance ensues from the more charge compensation during charge–discharge process,which enhances Faraday reaction compared with pure Mo_(2)CT_(x).This vacancy manipulation provides an efficient way to realize MXene’s potential as promising electrodes.Xin Guo Changda Wang Wenjie Wang Quan Zhou Wenjie Xu Pengjun Zhang Shiqiang Wei Yuyang Cao Kefu Zhu Zhanfeng Liu Xiya Yang Yixiu Wang Xiaojun Wu Li Song Shuangming Chen Xiaosong Liu 2022Nano Research Energy2022,1,3:2
9Origin of Dispersed Organic Matter within Sandstones and Its Implication for Uranium Mineralization:A Case Study from Dongsheng Uranium Ore Filed in China显示文摘Carbonaceous debris(CD),common dispersed organic matter(i.e.,DOM),is widely disseminated in sandstones from uranium-bearing strata from the Dongsheng uranium ore field of the northern Ordos Basin.Compositions of maceral,element and biomarkers of CD were investigated through a series of methods with optical microscope,elemental analyzer and gas chromatography-mass spectrometry analyses(GC-MS)to study origin of CD.The results show that CD,centrally distributed nearby channel erosion surface,decreases with the increased distances to channel erosion surface,which indicates the CD might be related to the coal seam from the upper unit of the J2y Formation or synsedimentary plant from the J2z Formation.Macerals of CD are composed of vitrinite(i.e.,V),inertinite(i.e.,I),and minerals,including that V is primary.Compared with the coals from the J2y Formation classed into vitrinertite-V(V+I>95%,V>I),CD is grouped into vitrite(V>95%).Although,CD and coal are similar in element composition,the former is of lower organic carbon,H,N,and higher S.The(C27+C29)/(C31+C33)ratios of n-alkanes biomarkers indicate that the percentage of woody plants accounting for vegetation composition of CD predominate over that of coal,which is also evidenced by the higher C/N ratios and oleanane contents of CD.The evidence is also supported by plant branch buried in sandstones.The distribution characteristics of CD and differences in vegetation types between CD and coal suggest that CD might be not from the coal seam from J2y.The tissue preservation index,gelification index,ground water level index,and vegetation index reflect that the paleoenvironment of CD is controlled by fluctuating water,which is also supported by the existences of round CD.Compared with peat,sedimentary paleoenvironment where CD deposits is of weaker reducibility,higher salinity by analyzing Pr/Ph ratios and gammacerane index.Distributions of n-alkanes carbon number of CD with the presence of unknown complex mixtures show that microbial activities exist in sand bodies.Differences in hydrodynamic intensity,redox condition,and microbial activity intensity between sedimentary paleoenvironment of CD and peat,show that CD is born in synsedimentary sandstone environment not in peat.Hence,it comprehensively draws conclusions that immature‘non-peatborn’CD is formed from the trunk,stem,branch,root fragments buried in sandstones,depositing in(micro)allochthonous positions by the influences of fluctuating water.The DOM from synsedimentary plant debris might play more roles in adsorption and complexation,and microorganisms may participate in uranium mineralization,which could provide certain guidance for uranium exploration and mining.Fan Zhang Yangquan Jiao Shuangming Wang Liqun Wu Hui Rong 2022Journal of Earth Science2022,33,2:2
10High-metallic-phase-concentration MO1-xWxS2 nanosheets with expanded interlayers as efficient electrocatalysts显示文摘Qun He Yangyang Wan Hongliang Jiang Chuanqiang Wu Zhongti Sun Shuangming Chen Yu Zhou Haiping Chen Daobin Liu Yasir A. Haleem Binghui Ge Xiaojun Wu Li Song 2018Nano Research2018,11,3:1
11Active {010} facet-exposed Cu2MoS4 nanotube as high-efficiency photocatalyst显示文摘Ke Zhang Yunxiang Lin Zahir Muhammad Chuanqiang Wu Shuang Yang Qun He Xusheng Zheng Shuangming Chen Binghui Ge Li Song 2017Nano Research2017,10,11:1
12Probing the degenerate pattern growth of {100}<011> orientation in a directionally solidified Al-4.5 wt% Cu alloy显示文摘Degenerate pattern is a seemingly disordered morphology but it exhibits the inherently ordered crystal connected with tip-splitting and limited stability which makes it difficult to observe in the metallic system. Here we employ(100)[011] orientated planar-front seeds using directional solidification and reveal the fundamental origins of the degenerate pattern growth in an Al-4.5 wt% Cu alloy. We find that the spacing of the tip-splitting(λ) in the degenerate of the alloys followed a power law,λ∝V^-0.5, and the frequency(f) of the splitting was related to the growth velocity(V) by f ∝V^1.5. The dimensionless growth direction(θ/θ0) increased monotonously and approached 0.6 with faster velocity, attributed to its anisotropy in the interface kinetics. Once growth velocity exceeded a threshold, two types of pattern transitions from degenerate to regular dendrites were proposed. One of them exhibited a random and chaotic mode and the other underwent a rotation in growth direction.Yumin Wang Shuangming Li Zhenpeng Liu Hong Zhong Lei Xu Hui Xing 2019Journal of Materials Science & Technology2019,35,7:1
13Motivating Ru-bri site of RuO_(2)by boron doping toward high performance acidic and neutral oxygen evolution显示文摘The electrocatalysis of oxygen evolution reaction(OER)plays a key role in clean energy storage and transfer.Nonetheless,the sluggish kinetics and poor durability under acidic and neutral conditions severely hinder practical applications such as electrolyzer compatible with the powerful proton exchange membrane and biohybrid fuel production.Here,we report a borondoped ruthenium dioxide electrocatalyst(B-RuO_(2))fabricated by a facile boric acid assisted strategy which demonstrates excellent acidic and neutral OER performances.Density functional theory calculations and advanced characterizations reveal that the boron species form an anomalous B–O covalent bonding with the oxygen atoms of RuO_(2)and expose the fully coordinately bridge ruthenium site(Ru-bri site),which seems like a switch that turns on the inactive Ru-bri site into OER-active,resulting in more exposed active sites,modified electronic structure,and optimized binding energy of intermediates.Thus,the B-RuO_(2)exhibits an ultralow overpotential of 200 mV at 10 mA/cm^(2)and maintains excellent stability compared to commercial RuO_(2)in 0.5 M sulfuric acid.Moreover,the superior performance is as well displayed in neutral electrolyte,surpassing most previously reported catalysts.Chongjing Liu Beibei Sheng Quan Zhou Dengfeng Cao Honghe Ding Shuangming Chen Pengjun Zhang Yujian Xia Xiaojun Wu Li Song 2022Nano Research2022,15,8:1
14On the probability of ruin in a Markov modulated risk model显示文摘Y LU L SHUANGMING 2005Insurance: Mathematics and Economics2005,37,:1
15Phosphate-induced interfacial electronic engineering in VPO_(4)-Ni_(2)P heterostructure for improved electrochemical water oxidation显示文摘Anodic oxygen evolution reaction(OER)is the key bottleneck for water electrolysis technique owing to its sluggish reaction kinetics.Interfacial engineering on the rationally designed heterostructure can regulate the electronic states efficiently for intrinsic activity improvement.Here,we report a co-phosphorization approach to construct a VPO_(4)-Ni_(2)P heterostructure on nickel foam with strongly chemical binding,wherein phosphate acts as electronic modifier for Ni_(2)P electrocatalyst.Profiting from the interfacial interaction,it is uncovered that electron shifts from Ni_(2)P to VPO_(4)to render valence increment in Ni species.Such an electronic manipulation rationalizes the chemical affinities of various oxygen intermediates in OER pathway,giving a substantially reduced energy barrier.As a result,the advanced VPO_(4)-Ni_(2)P heterostructure only requires an overpotential of 289 mV to deliver a high current density of 350 mA/cm^(2)for OER in alkaline electrolyte,together with a Tafel slope as low as 28 mV/dec.This work brings fresh insights into interfacial engineering for advanced electrocatalyst design.Kun Chen Keke Mao Yu Bai Delong Duan Shuangming Chen Chengming Wang Ning Zhang Ran Long Xiaojun Wu Li Song Yujie Xiong 2022Chinese Chemical Letters2022,33,1:1
16Spectrophotometric Determination of Lead in Foods With Dibromo-p-methyl-bromosulfonazo显示文摘Guozhen Fang Yongwen Liu Shuangming Meng Yong Guo 2002Talanta2002,54,4:1
17Competitive growth of different phases in eutectic alloys under directional solidification显示文摘By comparisons of interface growth temperatures of different phases in eutectic systems, competitive growth between the primary phase, halo structure and coupled eutectic has been discussed. The compositions for the formation of coupled eutectic have been discussed at the coexisting with the primary phase in eutectic under directional solidification. Solidification conditions, such as growth rate and composition required for the formation of the primary phase, halo structure and coupled eutectic have been proposed. Numerical calculation results show that no halo structure formed in directionally solidified Sn-Pb eutectic, but in Al-Si eutectic, competitive growth structures of the primary β-Si phase, α-Al halo structure and coupled eutectic (α+β) may exist at the hypereutectic composition between 12.6% and 25% Si. The calculated results of Al-Si eutectic fit in with the reported experiment results.LI Shuangming MA Bole LI Xiaoli LIU Lin FU Hengzhi 2005Science China(Technological Sciences)2005,48,3:1
18Phase Stability of the Laves Phase Cr_2Nb in a Two-Phase Cr-Cr_2Nb Alloy显示文摘The phase stability of the Laves phase Cr2Nb in a two-phase Cr-Cr2Nb alloy produced by arc-melting was investigated using X-ray difraction,transmission electron microscopy and selected area electron difraction.The experimental results indicated that the as-cast ingot was consisted of C15-Cr2Nb and Cr phases;the intermediate C36 and high-temperature C14 modifications of Cr2Nb,reported in literatures,were not detected in this study.These results,combined with a detailed analysis of the actual solidification conditions,revealed that the C14-Cr2Nb was a metastable rather than a stable high-temperature modification.Moreover,a kind of extremely fine lamellar structure was found to be randomly distributed in the eutectic cells,which may be formed by decomposition of the supersaturated C15-Cr2Nb via a discontinuous precipitation reaction.Kewei LI Shuangming LI Sixiang ZHAO Hong ZHONG Yunlong XUE Hengzhi FU 2013Acta Metallurgica Sinica(English Letters)2013,26,6:1
19Probing self-optimization of carbon support in oxygen evolution reaction显示文摘Despite acknowledgment of structural reconstruction of materials following oxygen evolution reaction (OER) reaction, the role of support during the reconstruction process has been ignored. Given this, we directly in situ transform the residual iron present in raw single-walled carbon nanotubes (SWCNT) into Fe_(2)O_(3) and thus build Fe_(2)O_(3)-CNT as the model system. Intriguingly, an anomalous self-optimization occurred on SWCNT and the derived components show satisfactory electrochemical performance. Soft X-ray absorption spectroscopy (sXAS) analysis and theory calculation correspondingly indicate that self-optimization yields stronger interaction between SWCNT and Fe_(2)O_(3) nanoparticles, where the electrons migrate from Fe_(2)O_(3) to optimized SWCNT. Such polarization will generate a positive charge center and thus boost the OER activity. This finding directly observes the self-optimization of support effect, providing a new perspective for OER and related electrochemical reactions.Wenjie Xu Dengfeng Cao Oyawale Adetunji Moses Beibei Sheng Chuanqiang Wu Hongwei Shou Xiaojun Wu Shuangming Chen Li Song 2021Nano Research2021,14,12:1
20Methyl prednisolone therapy clinical applica- tion in neurosurgery Analysis显示文摘Li Shuangming Chen Weixin 2012Guangdong medicine2012,13,4:1
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