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synergistic catalysis of cluster and atomic copper induced by copper-silica interface in transfer-hydrogenation

Nano Research 2021年第12期14卷 4601-4609页

作者： Ruoyu Fan Yange Zhang Zhi Hu Chun Chen Tongfei Shi Lirong Zheng Haimin Zhang Junfa Zhu Huijun Zhao Guozhong Wang Key Laboratory of Materials Physics Centre for Environmental and Energy NanomaterialsKey Laboratory of Materials PhysicsInstitute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei230031China Science Island Branch of Graduate School University of Science and Technology of ChinaHefei230026China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing100049China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei230026China Center for Clean Environment and Energy Gold Coast CampusGriffith UniversityQueensland4222Australia

To data,using strong metal-support interaction(SMSI)effect to improve the catalytic performance of metal catalysts is an important strategy for heterogeneous catalysis,and this effect is basically achieved by using reducible metal ***,the formation of SMSI between metal and inert-support has been so little coverage and remains *** this work,the SMSI effect can be effectively extended to the inert support-metal catalysis system to fabricate a Cu^(0)/Cu-doped SiO_(2) catalyst with high dispersion and loading(38.5 wt.%)through the interfacial effect of inert *** the catalyst,subnanometric composite of Cu cluster and atomic copper(in the configuration of Cu-O-Si)can be consciously formed on the silica interface,and verified by extended X-ray absorption fine structure(EXAFS),in situ X-ray photoelectron spectroscopy(XPS),and high-angle annular dark field-scanning transmission electron microscopy(HAADF-STEM)*** promoting activity in transfer-hydrogenation by the SMSI effect of Cu-silica interface and the synergistic active roles of cluster and atomic Cu have also been revealed from surface interface structure,catalytic activity,and density functional theory(DFT)theoretical calculation at an atomic *** subnanometric composite of cluster and atomic copper species can be derived from a facile synthesis strategy of metal-inert support SMSI effect and the realistic active site of Cu-based catalyst can also been identified accurately,thus it will help to expand the application of subnanometric materials in industrial catalysis.

关键词： strong metal-support interaction(SMSI) copper inert-support synergistic interfacial effect transfer-hydrogenation

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synergistic extraction of zinc from ammoniacal solutions using a β-diketone mixed with trialkylphosphine oxide

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Rare Metals 2019年第3期38卷 270-276页

作者： Ru-Long Zhu Xin-Bin Li Chang Wei Hui Huang Min-Ting Li Cun-Xiong Li Fu-Li Tang Faculty of Metallurgy and Energy Engineering Kunming University of Science and Technology Yunnan Yuntong Zinc Co. Ltd

A simple comparative study of synergistic extraction of zinc from ammonium sulfate and ammonium chloride systems with mixtures of Mextral54-100 and tri-nalkylphosphine oxide(TRPO) dissolved in n-heptane was described. Various parameters affecting the extraction process were investigated. Experimental results show that extraction from ammonium sulfate is better than that from ammonium chloride under the same conditions owing to the additional complexation between zinc and chloride ions. Total ammonium concentration and pH have a significant effect on zinc extraction efficiency because of the formation of zinc ammine complexes. The synergistic effect is explained by the formation of adduct between zinc chelates and trialkylphosphine oxide. The thermodynamic data show that the extraction reaction is exothermic and stripping is endothermic. Infrared(IR) spectra of the zincloaded organic phases were also examined.

关键词： synergistic extraction Zinc Ammonium sulfate Ammonium chloride Mextral54-100 Trialkylphosphine oxide

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synergistic Effect of NaCl and SO2 on the Initial Atmospheric Corrosion of Zinc Under Wet–Dry Cyclic Conditions

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Acta Metallurgica Sinica(English Letters) 2019年第6期32卷 780-796页

作者： Qi Yin Zhen-Yao Wang Miao-Ran Liu Chen Pan Environmental Corrosion Center Institute of Metal Research.Chinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China University of Chinese Academy of Sciences Beijing 100049China

The synergistic eff ect of NaCl and SO2 on the atmospheric corrosion of zinc has been studied at equivalent total but different ratios of molar deposition rate under wet–dry cyclic *** results show that the corrosion rates,corrosion morphologies and the composition of the corrosion products are strongly infl uenced by the molar deposition rate ratio of NaCl and SO2(NaCl/SO2).The corrosivity of NaCl and SO2 toward zinc increases in order of SO2<1:3<3:1

关键词： Atmospheric corrosion Zinc synergistic effect Corrosivity Corrosion morphology Gordaite

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synergistic extraction of heavy rare earths by mixture of α-aminophosphonic acid HEHAMP and HEHEHP

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Journal of Rare Earths 2019年第4期37卷 422-428页

作者： Qi Zhao Yanling Li Shengting Kuang Zhifeng Zhang Xue Bian Wuping Liao School of Metallurgy Northeastern University State Key Laboratory of Rare Earth Resource Utilization ERC for the Separation and Purification of REs and Thorium Changchun Institute of Applied Chemistry Chinese Academy of Sciences

synergistic extraction of heavy rare earths(REs) were investigated in chloride media by the mixture of(2-ethylhexylamino)methyl phosphonic acid mono-2-ethylhexyl ester(HEHAMP) and 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester(HEHEHP). The maximum synergistic enhancement coefficients(R) of Lu, Yb, Tm, Er, Y and Ho are 2.89, 2.76, 2.54, 2.14, 2.14 and 2.06, respectively, when the mole fraction X_(HEHAMP) is 0.5. The synergistic separation factors of the heavy REs are obtained(β_(Y/Ho)=1.31,β_(Er/Y)= 1.61,β_(Tm/Er)= 1.78, β_(Yb/Tm)= 1.76, β_(Lu/Yb) = 1.20). The extracted complex is determined to be RE[H(EHAMP)_2][H(EHEHP)_2]_2 by the slope analysis method. The loading capacities of the mixtures consisting of 15% HEHAMP and 15% HEHEHP for Y and Lu are about 26.59 g/L(Yb_2 O_3) and 27.25 g/L(Lu_2 O_3),respectively.

关键词： synergistic extraction α-aminophosphonic acid extractant HEHEHP Heavy rare earths

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Discovery of synergistic anti-inflammatory compound combination from herbal formula GuGe FengTong Tablet

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Chinese Journal of Natural Medicines 2018年第9期16卷 683-692页

作者： LIU Le-Le LIU Qun LI Ping LIU E-Hu State Key Laboratory of Natural Medicines School of Traditional Chinese PharmacyChina Pharmaceutical University

Multi-components in herbal formulae exert holistic effects in synergistic or additive manners. However, appropriate strategies and supportive evidences are still lacking to uncover the synergistic or additive combinations. The present investigation aimed at seeking a screening strategy to identify the targeted combinations in GuG e FengT ong Tablet(GGFTT), an herbal formula. Two compounds, belonging to different chemical classes, were combined with different concentration ratios and their anti-inflammation effects were investigated. The most significant anti-inflammatory combinations were evaluated by combination index(CI) method(additive effect, CI = 1; synergism, CI 1). The modulating effects of candidate combinations on pro-inflammatory cytokines and MAPKs signaling pathway were also detected. Two combinations, "biochanin A + 6-gingerol"(Bio-6 G) and "genistein + 6-gingerol"(Gen-6 G), showed synergistic effects(CI synergistically inhibit the production of pro-inflammatory cytokines(TNF-α, IL-1β, and IL-6) and the activation of MAPKs signaling pathway in LPS-stimulated RAW264.7 cells. The combined results showed that Bio-6 G was a synergistic anti-inflammatory combination in GGFTT. Our results could provide a useful strategy to screen the synergistic combinations in herbal formulae.

关键词： GuGe FengTong Tablet synergistic combinations Anti-inflammation Cytokines MAPKs

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synergistic effect between Laves phase and Zr Ni phases in Zr(MnVNi)_2 hydrogen storage alloys

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中国有色金属学会会刊：英文版 1999年第3期9卷 505-509页

作者： Zhang Wenkui(张文魁) 1, Ma Chun′an(马淳安) 1, Yang Xiaoguang(杨晓光) 2, Lei Yongquan(雷永泉) 2, Wang Qidong(王启东) 2 1 Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou 310014, P.R.China 2 Department of Material Zhejiang Univ Technol Dept Appl Chem Hangzhou 310014 Peoples R China Zhejiang Univ Dept Mat Sci & Engn Hangzhou 310027 Peoples R China

The effect of annealing treatment on the crystal structure and electrochemical properties of Zr(Mn 0.25 V 0.20 Ni 0.55 ) 2 and Zr(Mn 0.05 V 0.40 Ni 0.55 ) 2 hydrogen storage alloys was investigated by means of XRD analysis and electrochemical tests. The results of XRD analysis showed that the as cast alloys consist of C15, C14 type Laves phase and Zr 9Ni 11 and ZrNi phases. The composition of alloys homogenized after annealing treatment. The C15 type Laves phase is still stable while the Zr 9Ni 11 and ZrNi phases decompose and C14 phase disappears partially. The final stable structure of the alloys was a mixture phase of C15 and C14 type Laves phases. The results of the electrochemical tests showed that the discharge capacity and the properties of activation as well as high rate dischargeability are all decreased after annealing treatment. The exchange current density decreases in some degree too.

关键词： annealing treatment hydrogen storage alloys crystal structure electrochemical properties synergistic effect

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synergistic Corrosion Inhibition Effect of Molybdate and Phosphate Ions for Anodic Oxidation Film Formed on 2024 Aluminum Alloy

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Journal of Wuhan University of Technology(Materials Science) 2019年第2期34卷 426-432页

作者：王文博 DONG Peng WANG Haiyun 程杰刘胜利 College of Electronic and Optical Engineering Nanjing University of Posts and Telecommunications School of Science & New Energy Technology Engineering Laboratory of Jiangsu Province Nanjing University of Posts and Telecommunications Research Center for Smart Campus Nanjing University of Posts and Telecommunications

In order to effectively improve the corrosion resistance of aluminum alloys, anodic oxidation technique was used to generate the oxide film. We investigated the influences of two inorganic corrosion inhibitors(ammonium dihydrogen phosphate and sodium molybdate) on the corrosion resistance of anodic oxidation films on 2024 aluminum alloy, and studied the synergistic effect of two corrosion inhibitors. The corrosion resistance of anodic oxidation film in 3.5 wt% NaCl solution was evaluated by electrochemical impedance spectroscopy(EIS) and potentiodynamic polarization curves. Results show that, after adding the single ammonium dihydrogen phosphate or sodium molybdate of 0.01 M to oxalic acid electrolyte, inhibition efficiencies of the anodized samples are 10% and 47%, respectively. However, in the presence of two inhibitors with the same concentration of 0.01 M, inhibition efficiency can be as high as 92%. Therefore, we observed the significantly synergistic corrosion inhibition effect of molybdate and phosphate ions for anodic oxidation film formed on 2024 aluminum alloy.

关键词： anodic oxidation technique corrosion ammonium dihydrogen phosphate sodium molybdate synergistic effect

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synergistic O^(2-)/Li^(+) Dual Ion Transportation at Atomic Scale

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Research 2019年第1期2019卷 1260-1267页

作者： F.Q.Meng Q.H.Zhang A.Gao X.Z.Liu J.N.Zhang S.Y.Peng X.Lu L.Gu H.Li Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Materials Sun Yat-Sen UniversityGuangzhou 510275China College of Materials Science and Engineering Jiangxi University of Science and TechnologyJiangxi 341000China Songshan Lake Materials Laboratory DongguanGuangdong 523808China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China

Te ion migration during electrochemical process is a fundamental scientifc issue for phase transition behavior and of technical importance for various functional devices,where cations or anions are active under electrical *** only one type of functional ion,O^(2-)or Li^(+),is activated due to their diferent migration energy barriers,cooperated by the valence change of other immobile ions in the host lattice matrix,e.g.,Co^(2+)/Co^(3+)and Mn^(3+)/Mn4+redox couples,owing to the charge *** we select spinel Li4Ti5O12 as anode and construct an all-solid-state battery under a transmission electron microscope;a synergistic transportation of O^(2-)and Li^(+)driven by an electrical bias was directly observed at the atomic scale.A small amount of oxygen anions was extracted frstly as a result of its lowest vacancy formation energy under 2.2 V,leading to the vertical displacement of *** to 2.7 V,an ordered phase with both Li-and O-defciency *** Li^(+)and O^(2-)ions are simultaneously extracted out from the[LiO_(4)]tetrahedra due to the electroneutrality *** migration paths of O and Li have been proposed and verifed by frst-principles *** results reveal a brand new synergistic ion migration manner and may provide up-to-date insights on the transportation process of lithium ion conductors.

关键词： synergistic battery migration

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synergistic effect of flavonoids combined with antivenom on neutralisation of Naja naja venom

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Asian Pacific Journal of Tropical Biomedicine 2021年第7期11卷 298-307页

作者： Srimathi Raghavan Gurunathan Jayaraman School of Biosciences and Technology Vellore Institute of TechnologyVellore 632014India

Objective:To evaluate the neutralizing effects of flavonoids on snake venom toxicity by stand-alone and combinatorial ***:Synthetic flavonoids were assessed,either individually or in combination with antivenom,for their neutralization of phospholipase A_(2)(PLA_(2)),protease,antioxidant(DPPH)assay and hemotoxic *** docking studies were performed to understand possible binding of flavonoids with Naja naja venom PLA_(2).In vivo studies were carried out to confirm the neutralisation effects using a mouse ***,inhibition of PLA_(2) was monitored using combinatorial ***:Among the flavonoids used,quercetin and naringenin inhibited PLA_(2)(56%and 45%),protease(71%and 64%),DPPH scavenging(69.0%and 77.5%)and hemotoxic(70%)*** docking studies indicated that the flavonoids bind to the substrate-binding site of PLA_(2)(Cys44 and Tyr63).In vivo studies showed a reduction in the venom toxicity level in the presence of ***,combinatorial studies using the mixture of flavonoid and anti-venom revealed the possibility of synergistic effect(up to 32%enhancement)in neutralising the venom ***:These flavonoids can be used as additives for the treatment of snake bites,which may exert synergistic effects in combination with antivenom and decrease the post-therapeutic effects caused by excessive use of antivenom.

关键词： Flavonoid Anti-venom Snake bite Combinatorial synergistic Naja naja

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synergistic ACTION AMONG HYDROGEN,STRESS AND CORROSION MEDIUM ON AUSTENITIC STAINLESS STEEL

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Science China Mathematics 1992年第4期35卷 505-512页

作者：乔利杰褚武扬缪辉俊肖纪美郭培新 Department of Materials Physics Beijing University of Science and Technology Beijing 100083 PRC

A synergistic action among hydrogen, stress and corrosion medium on austenitic stainlesssteel has been investigated. The results show that both hydrogen and stress would increase thecorrosion rate and the effects of hydrogen and stress on the corrosion rate are synergistic ratherthan simple additive. Hydrogen decreases the threshold stress and delays fracture time of stresscorrosion cracking in a boiling MgCl_2 solution by a factor of 1/5 and 10, respectively.

关键词： synergistic action hydrogen stress corrosion cracking austenitic stainless steel.

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