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Reusable salt-template strategy for synthesis of porous nitrogen-rich carbon boosts H_(2)S selective oxidation

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Green Energy & Environment 2024年第12期9卷 1866-1877页

作者： Xu liu Liang Shan Xiaoxue Sun Tianxin Wang Zhongqing liu yuefeng liu College of Chemical Engineering Sichuan UniversityChengdu610065China Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of Sciences457 Zhongshan RoadDalian116023China College of Chemical Engineering Shenyang University of Chemical TechnologyShenyang110142China

Removing hydrogen sulfide(H_(2)S)via the selective oxidation has been considered an effective way to further purify the indusial sulfurcontaining due to it can completely transform residual H_(2)S into elemental *** N-doped porous carbon was applied to H_(2)S selective oxidation,a sustainable methodology for the synthesis of efficient and stable N-doped carbon catalysts remains a difficulty,limiting its future development in large-scale ***,we present porous,honeycomb-like N-doped carbon catalysts with large specific surface areas,high pyridinic N content,and numerous structural defects for H_(2)S selective oxidation prepared using reusable NaCl as the *** asprepared NC-10-800 catalyst exhibits excellent catalytic performance(sulfur formation rate of 784 g_(sulfur) kg_(cat.)^(-1) h^(-1)),outstanding stability(>100 h),and excellent anti-water vapor,anti-CO_(2) and anti-oxidation properties,suggesting significant potential for practical industrial *** characterization results and kinetic study demonstrate that the large surface areas and structural defects created by the molten salt at high temperature enhance the exposure of pyridinic N sites and thus accelerate the catalytic ***,the water-soluble NaCl template could be easily washed from the carbon nanomaterials,and thus the downstream salt-containing wastewater could be subsequently reused for the dissolution of carbon *** environment-friendly,low-cost,reusable salt-template strategy has significant implications for the development of N-doped carbon catalysts for practical applications.

关键词： H_(2)S selective oxidation Nitrogen-doped carbon Reusable salt-template Green synthesis Porous carbon nanomaterials

Cu-embedded porous Al_(2)O_(3) bifunctional catalyst derived from metal–organic framework for syngas-to-dimethyl ether

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Chinese Chemical Letters 2022年第6期33卷 2906-2910页

作者： Yongle Guo Lu Feng yuefeng liu Zhongkui Zhao State Key Laboratory of Fine Chemicals Department of Catalysis Chemistry and EngineeringSchool of Chemical EngineeringDalian University of TechnologyDalian 116024China Dalian National Laboratory for Clean Energy(DNL) Dalian Institute of Chemical PhysicsChinese Academy of ScienceDalian 116023China Zhang Dayu School of Chemistry Dalian University of TechnologyDalian 116024China

Dimethyl ether(DME),as a promising alternative to diesel fuel and liquefied petroleum gas,has attracted considerable attention in catalysis *** catalytic direct synthesis of DME from syngas is an upand-coming route but remains a *** this work,we firstly prepared a Cu-embedded porous Al_(2)O_(3)bifunctional catalyst(Cu@Al_(2)O_(3)-dp)by filling Cu-1,3,5-benzenetricarboxylate metal–organic framework(Cu-BTC MOF)with Al(OH)_(3) followed by a two-step calcination process(400℃for 4 h and 600℃for1 h),exhibiting excellent catalytic performance for direct synthesis of DME from ***@Al_(2)O_(3)-dp catalyst demonstrates much higher CO conversion(25.7%vs.15.4%)and extremely higher DME selectivity(90.4%vs.63.9%)with the increased catalytic stability compared to the supported Cu catalyst on MOF-derived porous Al_(2)O_(3)(Cu/Al_(2)O_(3))prepared by incipient wetness impregnation method,ascribed to the unique embedding-type structure,promoted Cu dispersion and stronger metal-support *** work not only provides an efficient syngas-to-DME catalyst,but also paves a new way for designing highly-efficient core-shell bifunctional catalysts for diverse consecutive reactions.

关键词： Dimethyl ether CO hydrogenation Bifunctional catalyst Embedding-type structure Metal–organic framework

New paths and research directions in CO_(2) conversion by electro-, photoand plasma catalysis

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Journal of Energy Chemistry 2024年第12期99卷 300-301页

作者： Claudio Ampelli Maria L.Carreon yuefeng liu University of Messina Italy Ralph E.Martin Department of Chemical Engineering-University of Arkansas3202 Bell Engineering Center FayetteilleAR72701USA Dalian Institute of Chemical Physics CASChina

CO_(2) conversion into value-added products by electro-, photoand plasma catalysis under mild operating conditions(ambient temperature and pressure) is an emerging area to achieve carbon circularity by producing chemicals and fuels using directly renewable energy. Among all CO_(2) conversion approaches, the electrocatalytic reduction of CO_(2) is the most mature technology, capable of achieving high productivity(i.e. high current densities) at large scale, especially for producing carbon monoxide(CO), but with many examples showing selectivity to C_(2) carbon products.

关键词： New paths and research directions in CO_(2)conversion by electro photoand plasma catalysis

Molybdenum carbide clusters for thermal conversion of CO2 to CO via reverse water-gas shift reaction

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Journal of Energy Chemistry 2020年第11期29卷 37-43页

作者： Ying Ma Zhanglong Guo Qian Jiang Kuang-Hsu Wu Huimin Gong yuefeng liu Dalian National Laboratory for Clean Energy(DNL) Dalian Institute of Chemical PhysicsChinese Academy of ScienceDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China School of Chemical Engineering The University of New South WalesKensingtonSydneyNSW 2052Australia

Molybdenum carbides are highly active for CO2 conversion to CO via the reverse water-gas shift(RWGS)reaction, however the large grain size up to micrometers renders its relatively lower active sites utilization efficiency while generating CH4 as a by-product. In this work, a homogeneously dispersed molybdenum carbide hybrid catalyst with sub-nanosized cluster(the average size as small as 0.5 nm) is prepared via a facile carbothermal treatment for highly selective CO2-CO reduction. The partially disordered Mo2C clusters are characterized by synchrotron high-resolution XRD and atomic resolution HAADF-STEM analysis, for which the source cause of the disorder is pinpointed by XAFS analysis to be the nitrogen intercalants from the carbonaceous precursor. The partially disordered Mo2C clusters show a RWGS rate as high as 184.4 μmol gMo2C-1s-1 at 400 ℃ with a superior selectivity toward CO(> 99.5%). This work 2 highlights a facile strategy for fabricating highly dispersed and partially disordered Mo2C clusters at a sub-nano size with beneficial N-doping for delivering high catalytic activity and operational stability.

关键词： Co2 conversion Reverse water-gas-shift reaction Molybdenum carbide cluster Sub-nanosize CO selectivity

Intercept Mode Suitable for the Space-Based Kinetic Energy Interceptor

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Journal of Shanghai Jiaotong university(Science) 2019年第5期24卷 671-680页

作者： DUAN Junhong liu yuefeng WAN Kaifang Air and Missile Defense College Air Force Engineering UniversityXi'an710051China Science and Technology onElectro-Optic Control Laboratory Luoyang471000HenanChina School of Electronics and Information Northwestern Polytechnical UniversityXi'an710129China

The intercept mode of space-based kinetic energy interceptor(KEI) is an essential problem to be solved in the concept design of KEI and is closely related to the KEI’s detailed designing and practical ***, this problem has not yet been investigated systematically and comprehensively. A suitable intercept mode for the KEI is proposed in this research. The intercept mode consists of three basic elements: the specific operation procedure, general scheme for the intercept trajectory, and mathematical model of the intercept *** example is provided to demonstrate the feasibility and effectiveness of the intercept mode. The intercept mode proposed in this research is capable of achieving a rapid intercept, and is applicable to the universal space interception.

关键词： kinetic energy interceptor(KEI) intercept mode trajectory planning guidance law pregnable area

Doped all-inorganic cesium zirconium halide perovskites with high-efficiency and tunable emission

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Journal of Energy Chemistry 2022年第2期31卷 600-604页

作者： Pengfei Cheng Daoyuan Zheng Lu Feng yuefeng liu Junxue liu Juntao Li Yang Yang Guoxiong Wang Keli Han State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical PhysicsChinese Academy of ScienceDalian 116023LiaoningChina Institute of Molecular Sciences and Engineering Shandong UniversityQingdao 266000ShandongChina Dalian National Laboratory for Clean Energy(DNL) Dalian Institute of Chemical PhysicsChinese Academy of ScienceDalian 116023LiaoningChina Key Laboratory of Chemical Lasers Dalian Institute of Chemical PhysicsChinese Academy of ScienceDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China

Doping enables manipulation of both the electrical and optical properties of halide ***,we incorporated Te^(4+) into Cs_(2)ZrCl_(6) single crystal,simultaneously preserving the vacancy-ordered structure,to obtain an efficient yellow-emitting perovskite with a near-unity photoluminescence quantum yield(PLQY≈97.6%).Te^(4+) doping modifies the hue and emission color of pristine Cs_(2)ZrCl_(6),generates new absorption channels,and successfully extends the excitation energy from<280 nm to 360-450 nm *** spectral characterizations,including ultrafast femtosecond transient absorption measurements,reveal that the bright yellow light is derived from triplet self-trapped ***,further tuning doping concentration enables Te-doped Cs_(2)ZrCl_(6) single crystals to exhibit efficient warm white light *** work provides a new perspective for the development and design of stable lead-free perovskites with highly efficient luminescence.

关键词： Zirconium halide perovskite Doping Excitation energy Photoluminescence Energy transfer

Oxidative dehydrogenation of propane over Ni-Mo-Mg-O catalysts

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Journal of Natural Gas Chemistry 2012年第1期21卷 43-48页

作者： Lin Wang Wei Chu Chengfa Jiang yuefeng liu Jie Wen Zaiku Xie Department of Chemical Engineering Sichuan UniversityChengdu 610065SichuanChina Shanghai Research Institute of Petrochemical Technology SINOPECShanghai 201209China

In this work, a series of Ni-Mo-Mg-O catalysts with mesoporous structure prepared by sol-gel method were investigated for the oxidative dehydrogenation of propane （ODHP）. The techniques of temperature-programmed reduction with H2 （H2-TPR）, N2 adsorption-desolption, Fourier transform infrared spectroscopy （FT-IR）, X-ray diffraction （XRD） and X-ray photoelectron spectra （XPS） were employed for catalyst characterization. It is found that the activity of the catalysts for ODHP increases first and then decreases with the increase of Mo content. The catalyst with a Mo/Ni atomic ratio of 1/1 exhibits the best catalytic activity, which gives the propene selectivity of 81.4% at a propane conversion of 11.3% under 600 ~C and maintains the good catalytic performance for 22 h on stream. This is related not only to its high reducibility and dispersion as revealed by TPR and XRD, but also to the formation of more selective oxygen species on the MoOz-NiO interface as identified by XPS.

关键词： nickel oxide molybdenum oxide mole ratio oxidative dehydrogenation of propane propene

Adsorption experiment of water-soluble rare earth elements in atmospheric depositions and implications for source tracing in South China

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Acta Geochimica 2021年第2期40卷 225-233页

作者： Xiaojian Mi Yuan Li yuefeng liu Yu Xie Hanjie Li Xiaotao Peng Houyun Zhou School of Geography South China Normal UniversityGuangzhou 510631China Department of Geography Lingnan Normal UniversityZhanjiang 524048China

The distribution patterns of rare earth elements(REEs)in fine-grained materials in various depositions were often found to be similar to those of the aeolian sediments deposited in the Loess Plateau in North China and the fine-grained materials were suggested to be derived from wind-blown ***,increasing evidence indicated that the REEs in the water-soluble portion of atmospheric depositions also displayed similar patterns to those of aeolian *** this study,water-soluble REEs in three atmospheric depositions collected from different climatic zones in China were adsorbed with two adsorbents with distinct adsorption capacity,glass powder,and co-precipitated iron *** results showed that the REEs adsorbed by the two adsorbents displayed patterns similar to those of the original atmospheric *** typical characteristics of the REE patterns of atmospheric deposition can be well reproduced in the adsorbed *** higher the REE concentrations in the atmospheric depositions,or the higher adsorption efficiency of the adsorbents,the better reproducibility of the REEs *** results suggest that the REEs of the fine-grained materials in various sediments,which have a high adsorption capacity,especially those deposited in South China,may come from the water-soluble REEs in atmospheric deposition,and may not be appropriate tracers of wind-blown dust from North China.

关键词： Atmospheric deposition Rare earth element Adsorption experiment Source tracing Fine-grained material

CuSx-mediated two reaction systems enable biomimetic photocatalysis in CO_(2) reduction with visible light

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Journal of Energy Chemistry 2022年第2期31卷 497-504页

作者： Ling-Xiang Wang Zhi-Qiang Wang Liang Wang Zhiyuan Yang Qiuyan Zhu Yifeng liu Wei Fang Xue-Qing Gong yuefeng liu Xiaolong liu Feng-Shou Xiao Key Laboratory of Applied Chemistry of Zhejiang Province Department of ChemistryZhejiang UniversityHangzhou 310028ZhejiangChina Key Lab of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina Key Laboratory for Advanced Materials and Joint International Research Laboratory for Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research CenterCentre for Computational Chemistry and Research Institute of Industrial CatalysisSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Dalian National Laboratory for Clean Energy(DNL) Dalian Institute of Chemical Physics(DICP)Chinese Academy of ScienceDalian 116023LiaoningChina State Key Laboratory of Optoelectronic Materials and Technologies School of MaterialsSun Yat-Sen UniversityGuangzhou 510275GuangdongChina

The performances of heterogeneous catalysts can be effectively improved by optimizing the catalysts via appropriate structure ***,we show that the catalysis of cuprous sulfide can be boosted by constructing the hybrid structure with Cu_(2)S nanoparticles on amorphous CuSx matrix(Cu_(2)S/CuSx).In the photocatalytic CO_(2) reduction under visible light irradiation,the Cu_(2)S/CuSx exhibited a CO production rate at 4.0μmol h-1 that is 12-fold higher than that of the general Cu_(2)S *** characterizations reveal that the Cu_(2)S/CuSx has two reaction systems that realize the biomimetic catalysis,involving in the light reaction on the Cu_(2)S nanoparticle-CuSx matrix heterojunctions for proton/electron production,and the dark reaction on the defect-rich CuSx for CO_(2) *** CuSx matrix could efficiently activate CO_(2) and stabilize the split hydrogen species to hinder undesired hydrogen evolution reaction,which benefits the proton-electron transfer to reduce CO_(2),a key step for bridging the two reaction systems.

关键词： CO_(2) Photoreduction Bifunctional catalyst Proton-coupled electron transfer