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| 1 | Optimizing zeolite stabilized Pt-Zn catalysts for propane dehydrogenation显示文摘Propane dehydrogenation(PDH)provides an alternative route to non-petroleum based propylene and eligible catalysts with good overall performance are still being explored.Herein,we report the construction of zeolite stabilized Pt-Zn catalysts Pt-Zn/Si-Beta for PDH.Characterization results from transmission electron microscopy(TEM),ultraviolet-visible(UV-vis)and Fourier transform infrared(FTIR)spectroscopy reveal that highly-dispersed Zn species are stabilized by the silanols from zeolite framework dealumination,which then act as the anchoring sites for Pt species.The close contact between Pt-Zn species and the electronic interaction thereof make Pt-Zn/Si-Beta robust PDH catalysts.Under optimized conditions,a high propylene production rate of 4.11 molmol_(Pt)^(-1)s^(-1),high propylene selectivity of 98% and a sustainable deactivation rate of~0.02 h^(-1)can be simultaneously achieved at 823 K.Coke deposition is not the key reason for the catalytic deactivation,while the loss of Zn species and the resulting aggregation of Pt species under high temperatures are responsible for the irreversible deactivation of Pt-Zn/Si-Beta catalyst in PDH reaction. | Linjun Xie Yuchao Chai Lanlan Sun Weili Dai Guangjun Wu Naijia Guan Landong Li | 2021 | Journal of Energy Chemistry2021，30，6： | 5 |
| 2 | Propane dehydrogenation catalyzed by in-situ partially reduced zinc cations confined in zeolites显示文摘Propane dehydrogenation(PDH), employing Pt-or Cr-based catalysts, represents an emerging industrial route for propylene production. Due to the scarcity of platinum and the toxicity of chromium, alternative PDH catalysts are being pursued. Herein, we report the construction of Zn-containing zeolite catalysts,namely Zn@S-1, for PDH reaction. Well-isolated zinc cations are successfully trapped and stabilized by the Si-OH groups in S-1 zeolites via in-situ hydrothermal synthesis. The as-prepared Zn@S-1 catalysts exhibit good dehydrogenation activity, high propylene selectivity, and regeneration capability in PDH reaction under employed conditions. The in-situ partial reduction of zinc species is observed and the partially reduced zinc cations are definitely identified as the active sites for PDH reaction. | Linjun Xie Rui Wang Yuchao Chai Xuefei Weng Naijia Guan Landong Li | 2021 | Journal of Energy Chemistry2021，30，12： | 4 |
| 3 | High activity of hot electrons from bulk 3D graphene materials for efficient photocatalytic hydrogen production显示文摘为经由切开的水的氢生产的有效光催化剂的设计和合成从理论、实际的观点是很重要的。许多基于金属的半导体在最近的十年为这个目的被探索了。这里,第一次完全基于碳的材料,体积三在尺寸上的 cross-linked graphene (3DG ) ,为氢作为光催化剂被开发了生产。它展出 270 摩尔的显著的氢生产率 ??? 琠? 敧敮慲整挠瑹瑯硯捩稠湩 ? 潩獮愠摮爠慥瑣癩? 硯杹湥猠数楣獥 ? 佒 ? 。 | Yanhong Lu Bo Ma Yang Yang Erwei Huang Zhen Ge Tengfei Zhang Suling Zhang Landong Li Naijia Guan Yanfeng Ma Yongsheng Chen | 2017 | Nano Research2017，10，5： | 3 |
| 4 | Selective reduction of nitrogen oxide from exhaust of lean burn engine over in situ synthesized monolithic Cu-TS-1/cordierite 显示文摘 | Landong Li Jixin Chen Shujuan Zhang | 2004 | Catalysis Today2004，90，： | 1 |
| 5 | A comprehensive investigation of influences of NO and O2 on N2O SCR by CH4 over Fe-USY zeolite 显示文摘 | Qun Shen Landong Li Chi He | 2009 | Applied Catalysis B Environmental2009，91，12： | 1 |
| 6 | Unexpected methanol to o- lefin conversion activity of low-silica aluminophosphate molecular sieves 显示文摘 | Dai Weili Li Niu Li Landong | 2011 | Catalysis Communications2011，16，1： | 1 |
| 7 | Methanol‐to‐Olefin Conversion Catalyzed by Low‐Silica AlPO‐34 with Traces of Br?nsted Acid Sites: Combined Catalytic and Spectroscopic Investigations显示文摘 | Weili Dai Xin Wang Guanjun Wu Landong Li Naijia Guan Michael Hunger | 2012 | ChemCatChem2012，，9： | 1 |
| 8 | Ir/ZSM-5/cordierite monolith for catalytic NOx reduction from automobile ex- haust显示文摘 | Li Landong Zhang Fuxiang Guan Naijia | 2008 | Catalysis Communications2008，9，： | 1 |
| 9 | Homogeneous-like Alkyne Selective Hydrogenation Catalyzed by Cationic Nickel Confined in Zeolite显示文摘The selective hydrogenation of alkynes to their corresponding alkenes is an important type of organic transformation,which is currently accomplished by modified palladium catalysts.Herein,we report that coordinatively unsaturated Ni(II)sites confined in faujasite zeolite,that is,Ni@Y,can efficiently catalyze the selective hydrogenation of various alkynes in both gas-and liquid phase.Spectroscopic and kinetic analyses explicitly reveal that alkyne hydrogenation over Ni@Y follows the homogeneous associative mechanism instead of the classic heterogeneous Horiuti–Polanyi mechanism.Density functional theory calculations confirm that the preferential adsorption of alkynes on coordinatively unsaturated Ni(II)sites is crucial to initiate dihydrogen activation for the subsequent hydrogenation.Ni@Y represents a true heterogeneous catalyst acting as a homogeneous catalyst and shares the advantages of both heterogeneous and homogeneous catalysis.These findings may shed light on the rational design of robust catalysts and new catalytic routes by linking heterogeneous and homogeneous catalysis. | Xin Deng Ruihao Bai Yuchao Chai Zhenpeng Hu Naijia Guan Landong Li | 2022 | CCS Chemistry2022，4，3： | 1 |
| 10 | selective catalytic reduction of nitrogen oxides over Cu-TS-1/cordierite and LaCu-TS-1/cordierite显示文摘 | Landong Li Jixin Chen Shujuan Zhang Naijia Guan Tianyou Wang Shuliang Liu | 2005 | Reaction Kinetics and Catalysis Letters2005，，1： | 1 |
| 11 | Study on Metal-MFI/Cordierite as Promising Catalysts for Selective Catalytic Reduction of Nitric Oxide by Propane in Excess Oxygen显示文摘 | Li Landong Chen Jixin Zhang Shujuan | 2004 | Journal of Catalysis2004，228，1： | 1 |
| 12 | CONVERGENCE ANALYSIS OF PARAREAL ALGORITHM BASED ON MILSTEIN SCHEME FOR STOCHASTIC DIFFERENTIAL EQUATIONS显示文摘In this paper,we propose a parareal algorithm for stochastic differential equations(SDEs),which proceeds as a two-level temporal parallelizable integrator with the Milstein scheme as the coarse propagator and the exact solution as the fine propagator.The convergence order of the proposed algorithm is analyzed under some regular assumptions.Finally,numerical experiments are dedicated to illustrate the convergence and the convergence order with respect to the iteration number k,which show the efficiency of the proposed method. | Liying Zhang Jing Wang Weien Zhou Landong Liu Li Zhang | 2020 | Journal of Computational Mathematics2020，38，3： | 1 |
| 13 | Application of ammonia probe-assisted solid-state NMR technique in zeolites and catalysis显示文摘Solid-state NMR(ssNMR)spectroscopy is a powerful technique for characterizing the surface sites of solid acids and organic intermediates formed during the acid catalyzed reaction.As a very useful probe molecule,ammonia is often utilized to determine the density of solidacids’surface sites by ssNMR spectroscopy.The present mini-review summarizes some of the latest research developments on the quantitative characterization of the acid sites and carbenium ions during the zeolite catalytic reaction by ammonia probe-assisted ssNMR spectroscopy. | Chang Wang Weili Dai Guangjun Wu Naijia Guan Landong Li | 2022 | Magnetic Resonance Letters2022，2，1： | 1 |
| 14 | Metal-seed assistant photodeposition of platinum over Ta_(3)N_(5) photocatalyst for promoted solar hydrogen production under visible light显示文摘Cocatalysts play a vital role in accelerating the reaction kinetics and improving the charge separation of photocatalysts for solar hydrogen production.The promotion of the photocatalytic activity largely relies on the loading approach of the cocatalysts.Herein,we introduce a metal-seed assistant photodeposition approach to load the hydrogen evolution cocatalyst of platinum onto the surface of Ta_(3)N_(5) photocatalyst,which exhibits about 3.6 times of higher photocatalytic proton reduction activity with respect to the corresponding impregnation or photodeposition loading.Based on our characterizations,the increscent contact area of the cocatalyst/semiconductor interface with metal-seed assistant photodeposition method is proposed to be responsible for the promoted charge separation as well as enhanced photocatalytic H2 evolution activity.It is interesting to note that this innovative deposition strategy can be easily extended to loading of platinum cocatalyst with other noble or non-noble metal seeds for promoted activities,demonstrating its good generality.Our work may provide an alternative way of depositing cocatalyst for better photocatalytic performances. | Juhong Lian Deng Li Yu Qi Nengcong Yang Rui Zhang Tengfeng Xie Naijia Guan Landong Li Fuxiang Zhang | 2021 | Journal of Energy Chemistry2021，30，4： | 1 |
| 15 | Influence of Sulfation on the Catalytic Activity of Ni-ZrO_2 for NO Reduction with Propane in Excess Oxygen显示文摘Selective catalytic reduction (SCR) of nitric oxide with propane in excess oxygen was investi- gated on Ni-ZrO2 (NZ) and sulfated Ni-ZrO2 (SNZ), prepared by coprecipitation from a mixture of nickel nitrate-zirconium oxychloride followed by modifying with (NH4)2SO4. It was found that sulfated Ni-ZrO2 catalyst showed higher activity for the SCR of NO with propane than that of Ni-ZrO2. The structural and surface properties of catalysts were studied by XRD, BET, SEM and FT-IR of pyridine adsorption. The experimental results indicated that the modification of (NH4)2SO4 resulted in the generation of strong Br?nsted and Lewis acid sites and promoted the dispersion of the Ni species, which could lead to higher NO conversion and propane efficiency in NO reduction. | Shujuan Zhang Landong Li Fuxiang Zhang Naijia Guan | 2005 | Journal of Natural Gas Chemistry2005，14，4： | 1 |
| 16 | Reversed configuration of photocatalyst to exhibit improved properties of basic processes compared to conventional one显示文摘Performances of semiconductor photocatalysts are integrally determined by efficiencies of basic processes such as light absorption,charge separation and surface catalysis,but conventional configurations of photocatalysts normally suffers from the competition of light absorption originating from cocatalyst deposition and limited interface charge separation between the photocatalyst and cocatalyst.Herein we give the first proof-of-concept illustration that a reversed configuration of photocatalysts with a core/shell structure of microsized Mo2N cocatalysts and nanosized CdS photocatalysts,which exhibits superior solar hydrogen production to the conventional configuration with nanosized Mo2N cocatalysts deposited on the surface of CdS photocatalysts.It is revealed that the reversed configuration outperforms the conventional one in all areas of light absorption,charge separation and surface catalysis.Strikingly,the special core/shell structure introduced here can well avoid the competition of light absorption by cocatalysts and make an effective confinement effect to promote the surface catalysis of Mo2N.Our finding provides an alternative strategy to improve performances of photocatalysts. | Juhong Lian Yu Qi Yunfeng Bao Zixi Yin Yang Zhang Nengcong Yang Naijia Guan Shengye Jin Landong Li Fuxiang Zhang | 2020 | Science China Chemistry2020，63，6： | 1 |
| 17 | Progressive steps and catalytic cycles in methanol-to-hydrocarbons reaction over acidic zeolites显示文摘Understanding the complete reaction network and mechanism of methanol to-hydrocarbons remains a key chal-lenge in the field of zeolite catalysis and C1 chemistry.Inspired by the identification of the reactive surface methoxy species on solid acids,several direct mechanisms associated with the formation of the first C-C bond in methanol conversion have been recently disclosed.Identifying the stepwise involvement of the initial intermedi-ates containing the first CC bond in the whole reaction process of methanol to-hydrocarbons conversion becomes possible and attractive for the further development of this important reaction.Herein,several initial unsaturated aldehydes/ketones containing the C-C bond are identified via complementary spectroscopic techniques.With the combination of kinetic and spectroscopic analyses,a complete roadmap of the zeolite catalyzed methanol-to-hydrocarbons conversion from the initial CC bonds to the hydrocarbon pool species via the oxygen-containing unsaturated intermediates is clearly ilustrated.With the participation of both Bronsted and Lewis acid sites in H-ZSM-5 zeolite,an initial aldol-cycle is proposed,which can be closely connected to the well-known dual-cycle mechanism in the methanol-to-hydrocarbons conversion. | Liu Yang Chang Wang Weili Dai Guangjun Wu Naijia Guan Landong Li | 2022 | Fundamental Research2022，2，2： | 0 |
| 18 | Conductive catalysis by subsurface transition metals显示文摘The nature of catalysis has been hotly pursued for over a century, and current research is focused on understanding active centers and their electronic structures. Herein, the concept of conductive catalysis is proposed and verified by theoretical simulations and experimental observations. Metallic systems containing buried catalytically active transitional metals and exposed catalytically inert main group metals are constructed, and the electronic interaction between them via metallic bonding is disclosed. Through the electronic interaction, the catalytic properties of subsurface transitional metals(Pd or Rh) can be transferred to outermost main group metals(Al or Mg) for several important transformations like semi-hydrogenation,Suzuki-coupling and hydroformylation. The catalytic force is conductive, in analogy with the magnetic force and electrostatic force. The traditional definition of active centers is challenged by the concept of conductive catalysis and the electronic nature of catalysis is more easily understood. It might provide new opportunities for shielding traditional active centers against poisoning or leaching and allow for precise regulation of their catalytic properties by the conductive layer. | Xin Deng Caiyan Zheng Yangsheng Li Zeyu Zhou Jiamin Wang Yihua Ran Zhenpeng Hu Fan Yang Landong Li | 2024 | National Science Review2024，11，1： | 0 |
| 19 | Zeolite-encaged mononuclear copper centers catalyze CO_(2)selective hydrogenation to methanol显示文摘The selective hydrogenation of CO_(2) to methanol by renewable hydrogen source represents an attractive route for CO_(2) recycling and is carbon neutral.Stable catalysts with high activity and methanol selectivity are being vigorously pursued,and current debates on the active site and reaction pathway need to be clarified.Here,we report a design of faujasite-encaged mononuclear Cu centers,namely Cu@FAU,for this challenging reaction.Stable methanol space-time-yield(STY)of 12.8 mmol g_(cat)^(-1)h^(-1)and methanol selectivity of 89.5%are simultaneously achieved at a relatively low reaction temperature of 513 K,making Cu@FAU a potential methanol synthesis catalyst from CO_(2) hydrogenation.With zeolite-encaged mononuclear Cu centers as the destined active sites,the unique reaction pathway of stepwise CO_(2)hydrogenation over Cu@FAU is illustrated.This work provides a clear example of catalytic reaction with explicit structure-activity relationship and highlights the power of zeolite catalysis in complex chemical transformations. | Yuchao Chai Bin Qin Bonan Li Weili Dai Guangjun Wu Naijia Guan Landong Li | 2023 | National Science Review2023，10，7： | 0 |
| 20 | Efficient Heterogeneous Hydroformylation over Zeolite-Encaged Isolated Rhodium Ions显示文摘Alkene hydroformylation is an extremely important industry process currently accomplished via homogeneous catalysis.Heterogeneous hydroformylation is being avidly pursued as a more economical and sustainable process.Herein,we report the construction of zeolite-encaged rhodium catalyst for efficient hydroformylation.Through a facile in situ hydrothermal strategy,isolated Rh^(δ+)(δ=2.5)can be encaged in faujasite and efficiently stabilized via interaction with framework oxygen atoms,producing a Rh@Y model catalyst with well-defined rhodium sites and coordination environment.Rh@Y exhibits high catalytic activity,perfect chemoselectivity,and recyclability in 1-hexene hydroformylation under mild reaction conditions,making it a robust heterogeneous catalyst for potential applications.A state-of-the-art turnover frequency value of 6567 molC=C/molRh/h for Rh@Y can be achieved in 1-hexene hydroformylation at 393 K,outperforming all heterogeneous catalysts and most homogeneous catalysts under comparable conditions.With the well-defined structure of Rh@Y,the detailed mechanism of alkene hydroformylation can be interpreted via theoretical calculations,and the advantages of heterogeneous hydroformylation are well explained.This work provides a promising solution toward efficient heterogeneous noble metal catalysis by encaging stable isolated ions in a zeolite matrix. | Weixiang Shang Bin Qin Mingyang Gao Xuetao Qin Yuchao Chai Guangjun Wu Naijia Guan Ding Ma Landong Li | 2023 | CCS Chemistry2023，5，7： | 0 |
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