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49篇 您的检索式:作者名="Xinhe Li"
    题名 作者 年代 出处 被引量
1Nitrogen doped carbon catalyzing acetylene conversion to vinyl chloride显示文摘Commercial production of vinyl chloride from acetylene relies on the use of HgCl2as the catalyst, which has caused severe environmental problem and threats to human health because of its toxicity. Therefore, it is vital to explore alternative catalysts without mercury. We report here that N-doped carbon can catalyze directly transformation of acetylene to vinyl chloride. Particularly, N-doped high surface area mesoporous carbon exhibits a rather high activity with the acetylene conversion reaching 77% and vinyl chloride selectivity above 98% at a space velocity of 1.0 mL min-1 g-1and 200 ℃. It delivers a stable performance within a test period of 100 h and no obvious deactivation is observed,demonstrating potentials to substitute the notoriously toxic mercuric chloride catalyst.Xingyun Li Xiulian Pan Xinhe Bao 2014Journal of Energy Chemistry2014,23,2:11
2Architecture of PtFe/C catalyst with high activity and durability for oxygen reduction reaction显示文摘PtFe/C 催化剂被列在后面由的受精和高温度的减小综合了酸沥滤。X 光检查衍射, X 光检查光电子光谱学和在边光谱学描述附近原子的 X 光检查揭示那磅 < 潜水艇 class= “ a-plus-plus ” > 3 Fe 合金形成发生在高温度的减小和那不稳定的 Fe 种期间被溶解进酸溶液。在到表面并且强壮的 O-Fe 结合的从核心区域的 Fe 集中的差别可以驾驶 Fe 的外面的散开到高度弄皱的磅骨骼,并且高度结果驱散表面 FeO <潜水艇class=“ a-plus-plus ”> x 在酸的媒介是稳定的,导致磅的构造<潜水艇class=“ a-plus-plus ”> 3 Fe@Pt-FeO <潜水艇class=“ a-plus-plus ”> x 建筑学。是准备了 PtFe/C 催化剂与 Pt/C 催化剂相比为氧减小反应表明一项更高的活动和可比较的耐久性,它可能在 PtFe/C 催化剂由于表面和表面下的 Fe 种类的合作效果。Jiayuan Li Guoxiong Wang Jing Wang Shu Miao Mingming Wei Fan Yang Liang Yu Xinhe Bao 2014Nano Research2014,7,10:8
3Selective conversion of syngas to propane over ZnCrO_x-SSZ-39 OX-ZEO catalysts显示文摘Oxide-Zeolite(OX-ZEO) bifunctional catalyst design concept has been exemplified in several processes to direct conversion syngas to value-added chemicals and fuels such as mixed light olefins, ethylene, aromatics and gasoline.Herein we demonstrate that the product can be steered toward liquefied petroleum gas(LPG) with a selectivity up to 89% in hydrocarbons especially propane selectivity reaching 80% at CO conversion of 63% using ZnCrOx-H-SSZ-39 catalyst.Interestingly, the quantity of the acid sites of SSZ-39 does not influence obviously the hydrocarbon distribution but the strength is crucial for selective formation of propane.This finding provides an alternative route of LPG synthesis from a variety of carbon resources via syngas.Gen Li Feng Jiao Dengyun Miao Yong Wang Xiulian Pan Toshiyuki Yokoi Xiangju Meng Feng-Shou Xiao Andrei-Nicolae Parvulescu Ulrich Müller Xinhe Bao 2019Journal of Energy Chemistry2019,28,9:6
4Catalysis under shell: Improved CO oxidation reaction confined in Pt@h-BN core-shell nanoreactors显示文摘Core-shell nanostructures consisting of active metal cores and protective shells often exhibit enhanced catalytic performance, in which reactants can access a small part of the core surfaces through the pores in the shells. In this study, we show that Pt nanoparticles (NPs) can be embedded into few-layer hexagonal boron nitride (h-BN) overlayers, forming Pt@h-BN core-shell nanocatalysts. The h-BN shells not only protect the Pt NPs under harsh conditions but also allow gaseous molecules such as CO and O2 to access a large part of the Pt surfaces through a facile intercalation process. As a result, the Pt@h-BN nanostructures act as nanoreactors, and CO oxidation reactions with improved activity, selectivity, and stability occur at the core-shell interfaces. The confinement effect exerted by the h-BN shells promotes the Pt-catalyzed reactions. Our work suggests that two-dimensional shells can function as robust but flexible covers on nanocatalyst surfaces and tune the surface reactivity.Mengmeng Sun Qiang Fu Lijun Gao Yanping Zheng Yangyang Li Mingshu Chen Xinhe Bao 2017Nano Research2017,10,4:5
5Highly efficient catalytic scavenging of oxygen free radicals with graphene-encapsulated metal nanoshields显示文摘Junying Wang Xiaoju Cui Haobo Li Jianping Xiao Jiang Yang Xiaoyu Mu Haixia Liu Yuan-Ming Sun Xuhui Xue Changlong Liu Xiao-Dong Zhang Dehui Deng Xinhe Bao 2018Nano Research2018,11,5:4
6Mahalanobis distance-based fading cubature Kalman filter with augmented mechanism for hypersonic vehicle INS/CNS autonomous integration显示文摘Inertial Navigation System/Celestial Navigation System(INS/CNS)integration,especially for the tightly-coupled mode,provides a promising autonomous tactics for Hypersonic Vehicle(HV)in military demands.However,INS/CNS integration is a challenging research task due to its special characteristics such as strong nonlinearity,non-additive noise and dynamic complexity.This paper presents a novel nonlinear filtering method for INS/CNS integration by adopting the emerging Cubature Kalman Filter(CKF)to handle the strong INS error model nonlinearity caused by HV's high dynamics.It combines the state-augmentation technique into the nonlinear CKF to decrease the negative effect of non-additive noise in inertial measurements.Subsequently,a technique for the detection of dynamic model uncertainty is developed,and the augmented CKF is modified with fading memory to tackle dynamic model uncertainty by rigorously deriving the fading factor via the theory of Mahalanobis distance without artificial empiricism.Simulation results and comparison analysis prove that the proposed method can effectively curb the adverse impacts of non-additive noise and dynamic model uncertainty for inertial measurements,leading to improved performance for HV navigation with tightly-coupled INS/CNS integration.Bingbing GAO Wenmin LI Gaoge HU Yongmin ZHONG Xinhe ZHU 2022Chinese Journal of Aeronautics2022,35,5:4
7Simultaneous N-intercalation and N-doping of epitaxial graphene on 6H-SiC(0001) through thermal reactions with ammonia显示文摘6H-SiC (0001 ) 上的取向附生的 graphene overlayers 的表面 functionalization 在 NH3 通过热反应被尝试了。X 光检查光电子光谱学和 N 的重要数量在对待 NH3 的 graphene 是在场的微区域的低精力电子衍射结果表演出现,它导致强壮的乐队弯曲在原文如此从底层象 graphene overlayers 的去耦一样出现。表面 N 种类的多数能被在真空退火直到 850 移开 ?Zhou-jun Wang Mingming Wei Li Jin Yanxiao Ning Liang Yu Qiang Fu Xinhe Bao 2013Nano Research2013,6,6:3
8Two-step pyrolysis of ZIF-8 functionalized with ammonium ferric citrate for efficient oxygen reduction reaction显示文摘Zeolitic imidazolate frameworks(ZIFs) are widely employed in catalyst synthesis as parental materials for electrochemical energy storage and conversion. Herein, we have demonstrated a facile synthesis of highly efficient catalyst for oxygen reduction reaction in both alkaline and acidic medium, which is derived from ZIF-8 functionalized with ammonium ferric citrate via two-step pyrolysis in Ar and NH_3 atmosphere.The results reveal that the catalytic activity improvement after NH3 pyrolysis benefits from mesoporedominated morphology and high utilization of Fe-containing active sites. The optimum catalyst shows excellent performance in zinc-air battery and polymer electrolyte membrane fuel cell tests.Yifan Ye Fan Cai Chengcheng Yan Yanshuo Li Guoxiong Wang Xinhe Bao 2017Journal of Energy Chemistry2017,26,6:2
9Direct experimental detection of hydrogen radicals in non-oxidative methane catalytic reaction显示文摘Non-oxidative conversion of methane to olefins,aromatics and hydrogen(MTOAH) has been reported recently over metal single sites such as iron and platinum.The reaction was proposed to involve catalytic activation of methane followed by gas phase C-C coupling of methyl radicals.This study using H atom Rydberg Tagging time-of-flight technique provides direct experimental evidence for the formation of hydrogen radicals during MTOAH reaction over a catalytic quartz wall reactor containing embedded iron species(denoted as Fe-reactor).Fe-reactor gives 7.3% methane conversion at 1273 K with 41.2% selectivity toward C2(ethane,ethylene and acetylene) and 31.8% toward BTX(benzene,toluene and xylene),respectively.The enhancing effects of hydrogen radicals on overall MTOAH performance are validated by cofeeding hydrogen donor benzene,which provides an additional route of methane activation apart from catalytic activation.Jianqi Hao Pierre Schwach Lulu Li Xiaoguang Guo Junben Weng Hailei Zhang Hao Shen Guangzong Fang Xin Huang Xiulian Pan Chunlei Xiao Xueming Yang Xinhe Bao 2021Journal of Energy Chemistry2021,30,1:2
10Selectivity modulation in the consecutive hydrogenation of benzaldehyde via functionalization of carbon nanotubes显示文摘Hydrogenation of benzaldehyde is a typical consecutive reaction,since the intermediate benzyl alcohol is apt to be further hydrogenated.Here we demonstrate that the selectivity of benzyl alcohol can be tuned via functionalization of carbon nanotubes(CNTs),which are used as the support of Pd.With the original CNTs,the selectivity of benzyl alcohol is 88% at a 100% conversion of benzaldehyde.With introduction of oxygen-containing groups onto CNTs,it drops to 27%.In contrast,doping CNTs with N atoms,the selectivity reaches 96% under the same reaction conditions.The kinetic study shows that hydrogenation of benzyl alcohol is significantly suppressed,which can be attributed to weakened adsorption of benzyl alcohol.This is most likely related to the modified electronic structure of Pd species via interaction with functionalized CNTs,as shown by XPS characterization.Yonghua Zhou Jing Liu Xingyun Li Xiulian Pan Xinhe Bao 2012Journal of Natural Gas Chemistry2012,21,3:2
11High temperature performance of coaxial h-BN/CNT wires above 1,000 ℃:Thermionic electron emission and thermally activated conductivity显示文摘The development of wires and cables that can tolerate extremely high temperatures will be very important for probing extreme environments, such as in solar exploration, fire disasters, high-temperature materials processing, aeronautics and astronautics. In this paper, a lightweight high-temperature coaxial h-boron nitride (BN)/carbon nanotube (CNT) wire is synthesized by the chemical vapor deposition (CVD) epitaxial growth of h-BN on CNT yarn. The epitaxially grown h-BN acts as both an insulating material and a jacket that protects against oxidation. It has been shown that the thermionic electron emission (1,200 K) and thermally activated conductivity (1,000 K) are two principal mechanisms for insulation failure of h-BN at high temperatures. The thermionic emission of h-BN can provide the work function of h-BN, which ranges from 4.22 to 4.61 eV in the temperature range of 1,306-1,787 K. The change in the resistivity of h-BN with temperature follows the ohmic conduction model of an insulator, and it can provide the “electron activation energy”(the energy from the Fermi level to the conduction band of h-BN), which ranges from 2.79 to 3.08 eV, corresponding to a band gap for h-BN ranging from 5.6 to 6.2 eV. However, since the leakage current is very small, both phenomena have no obvious influence on the signal transmission at the working temperature. This lightweight coaxial h-BN/CNT wire can tolerate 1,200 ℃ in air and can transmit electrical signals as normal. It is hoped that this lightweight high-temperature wire will open up new possibilities for a wide range of applications in extreme high-temperature conditions.Xinhe Yang Peng Liu Duanliang Zhou Feng Gao Xinhe Wang Shiwei Lv Zi Yuan Xiang Jin Wei Zhao Haoming Wei Lina Zhang Jiandong Gao Qunqing Li Shoushan Fan Kaili Jiang 2019Nano Research2019,12,8:2
12The Impacts on Spinach Growth and Yield by Biological Organic Fertilizer显示文摘To decrease fertilization amount of chemical fertilizer and improve the quality of vegetable crops,spinach was taken as the test material,and the impact of different fertilizer on spinach growth and yield was studied via the manners of biological organic fertilizer and organic fertilizer + chemical fertilizer. Experimental results showed that in the formula of organic fertilizer + chemical fertilizer,chlorophyll and nitrogen contents in spinach leaves obviously increased; in the formula of only adding organic fertilizer,spinach leaf temperature,leaf width,root length,plant height and fresh weight were all better than those in the formula of organic fertilizer + chemical fertilizer,and better formulas were A_5,E_5,F_3 and I_5,in which spinach plant height in E_5 was 5. 63 times higher than G_5,root length in E_5 was 2. 67 times higher than G_5,and fresh weight in G_5 was 32. 6 times higher than G_5. By comprehensive analysis,the most suitable formula for spinach production was E_5,and the research could provide theoretic basis for fertilization amount of organic fertilizer required by spinach growth and development.Hongdou LIU Hailin JIN Nan LI Xinhe LIU Xue LI Fanteng CONG Renzhe PIAO Hongyan ZHAO 2018Asian Agricultural Research2018,10,3:2
13Creating Mesopores in ZSM-5 Zeolite by Alkali Treatment: A New Way to Enhance the Catalytic Performance of Methane Dehydroaromatization on Mo/HZSM-5 Catalysts显示文摘Lingling Su Lin Liu Jianqin Zhuang Hongxia Wang Yonggang Li Wenjie Shen Yide Xu Xinhe Bao 2003Catalysis Letters (-)2003,,3:1
14Controlled growth of uniform two-dimensional ZnO overlayers on Au(111)and surface hydroxylation显示文摘Ultrathin ZnO nano structures prese nt in teresti ng two-dimensi on al(2D)graphene-like structure in contrast to wurtzite structure in bulk ZnO.Growth on Au(111)has been regarded as a well-established route to the 2D ZnO layers while controlled growth of uniform ZnO nano structures remains as a challe nge.Here,reactive deposition of Zn in O3 and NO2 was employed,which is investigated by sea nning tunneling microscopy and X-ray photoelectr on spectroscopy(XPS).We dem on strate that uniform ZnO mono layer nanoislands and films can be obtained on Au(111)using O3 and uniform ZnO bilayer nanoislands and films form on Au(111)using NO2,respectively.Formation of atomic oxyge n overlayers on Au(111)via exposure to O3 is critical to the formatio n of uniform ZnO mono layer nano structures atop.Near ambient pressure XPS studies revealed that n early full hydroxy lati on occurs on mono layer ZnO structures upon exposure to near ambient pressure water vapor or atomic hydrogen species,while partial surface hydroxylation happens on bilayer ZnO under the same gaseous exposure conditions.Hao Wu Qiang Fu Yifan Li Yi Cui Rui Wang Nan Su Le Lin Aiyi Dong Yanxiao Ning Fan Yang Xinhe Bao 2019Nano Research2019,12,9:1
15Modulation of the textures and chemical nature of C–SiC as the support of Pd for liquid phase hydrogenation显示文摘Xingyun Li Xiulian Pan Yonghua Zhou Xinhe Bao 2013Carbon2013,,:1
16A new approach to metal surface nitriding using di- electric barrier discharge at atmospheric pressure 显示文摘Yan Li Zhu Xinhe Xu Jiujun Gao Yuzhou Qin Yah Bai Xiyao 2005Plasma Chemistry and Plasma Processing2005,,25:1
17Highly selective methanol-to-olefin reaction on pyridine modified H-mordenite显示文摘The effects of the acid site in main channels of MOR zeolites on their product selectivity and deactivation in the MTO(methanol to olefin) reactions were investigated. The catalytic analysis demonstrates that the pyridine modified MOR zeolite yielded high selectivity(> 65.3%) of C_2~=-C_4~=, although the conversion dropped from 100% to 54%. Furthermore, both the catalytic lifetime of MOR and the stability of yielding the lower olefins were increased from less than 30 min to more than 120 min after the modification with pyridine.1H MAS NMR on MOR and modified MOR shows that the acid sites in main channel do not benefit the productivity of lower olefins and catalysts' lifetime. It can be concluded from ex-situ ^(13)C CP MAS NMR that the deposit species during the MTO reaction depend on the pore sizes, and the formation of large alkyl aromatic species more likely occurs in the 12-ring main channels rather than the 8-ring side pocket.TingHe Guangjin Hou Jinjing Li Xianchun Liu Shutao Xu Xiuwen Han Xinhe Bao 2017Journal of Energy Chemistry2017,26,3:1
18Creating Mesopores in ZSM-5 Zeolite by Alkali Treatment: A New Way to Enhance the Catalytic Performance of Methane Dehydroaromatization on Mo/HZSM-5 Catalysts显示文摘Lingling Su Lin Liu Jianqin Zhuang Hongxia Wang Yonggang Li Wenjie Shen Yide Xu Xinhe Bao 2003Catalysis Letters (-)2003,,3:1
19Stability of impulsive dif- ferential systems 显示文摘Li Zhengguo Soh C B Xu Xinhe 1997Journal of Mathematical Analysis and Applications1997,216,:1
20Lyapunov Stability of a Class of Hybrid Dynamic Systems显示文摘Li Zhengguo Soh Chenong Boon Xu Xinhe 2000Automatica2000,36,3:1
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