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学者姓名：林性贻
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Abstract ：
Community detection is an important tool for analyzing and understanding large-scale complex networks. It can divide the network nodes into multiple communities, which have dense intra-community connections and sparse inter-community connections. Traditional community detection algorithms focus on non-attributed networks that contain only topological structures and ignore the attribute information on the nodes. Dual-channel attribute network community detection model optimizes the topology and attribute information as two channels, which can make full use of the two types of information and improve the clustering accuracy of the model. As a classical mathematical method of community detection, non-negative matrix factorization is only suitable for linear data, and cannot mine the nonlinear latent structural features. To address these limitations, this paper proposes a dual-channel attributed graph community detection algorithm based on kernel matrix factorization(KDACD). The nonlinear relations between nodes are learned by using kernel trick which projecting attribute features of nodes into high-dimensional Hilbert Spaces, and the robustness of the model is improved by sparse constraints and manifold regularization terms. Extensive experiments on 6 real-world datasets verify the effectiveness of the algorithm.
Keyword ：
Attributed graph community detection Attributed graph community detection kernel trick kernel trick manifold regularization manifold regularization non-negative matrix factorization non-negative matrix factorization unsupervised learning unsupervised learning
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| GB/T 7714 | Zheng, Zhiwen , Chen, Xiaoyun , Lin, Xinyi . Kernel Based Dual-Channel Attributed Graph Community Detection [J]. | IEEE TRANSACTIONS ON NETWORK SCIENCE AND ENGINEERING , 2024 , 11 (1) : 592-603 . |
| MLA | Zheng, Zhiwen 等. "Kernel Based Dual-Channel Attributed Graph Community Detection" . | IEEE TRANSACTIONS ON NETWORK SCIENCE AND ENGINEERING 11 . 1 (2024) : 592-603 . |
| APA | Zheng, Zhiwen , Chen, Xiaoyun , Lin, Xinyi . Kernel Based Dual-Channel Attributed Graph Community Detection . | IEEE TRANSACTIONS ON NETWORK SCIENCE AND ENGINEERING , 2024 , 11 (1) , 592-603 . |
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Ammonia decomposition is a structure-sensitive reaction, so the difference in structure of Ammonia decomposition is a structure-sensitive reaction, so the difference in structure of similar catalysts may have a great impact on the catalytic performance of ammonia decomposition reaction. However, it is not clear which structural properties can play a role in ammonia decomposition reaction and the degree of influence on catalytic performance. To explore this question, ammonia evaporation-hydrothermal (AEH), impregnation (IM), and evaporation-induced self-assembly (EISA) methods were used to synthesize Ni/SiO2 catalysts to obtain carbon-free hydrogen from catalyzing NH3 decomposition reaction. Among the three, the Ni/SiO2 catalyst synthesized via ammonia evaporation-hydrothermal method is the smallest in terms of Ni nanoparticles (similar to 3.0 nm) and the strongest Ni-SiO2 interaction. For ammonia decomposition, it is the highest in activity and thermal stability. The NH3 conversion at 650 degrees C and 30 000 mL g(cat)(-1)h(-1) (GHSV) over Ni/SiO2-AEH was close to 90 % and remained stable in an evaluation period of 60 h.
Keyword ：
Ammonia decomposition Ammonia decomposition Hydrogen production Hydrogen production Metal-support interaction Metal-support interaction Ni catalyst Ni catalyst
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| GB/T 7714 | Ren, Hongju , Cheng, Jinxing , Fang, Huihuang et al. Phyllosilicate-derived Ni catalysts with small nanoparticle size and strong metal-support interaction for efficient and robust decomposition of ammonia [J]. | APPLIED CATALYSIS A-GENERAL , 2023 , 664 . |
| MLA | Ren, Hongju et al. "Phyllosilicate-derived Ni catalysts with small nanoparticle size and strong metal-support interaction for efficient and robust decomposition of ammonia" . | APPLIED CATALYSIS A-GENERAL 664 (2023) . |
| APA | Ren, Hongju , Cheng, Jinxing , Fang, Huihuang , Zhong, Fulan , Chen, Chongqi , Lin, Li et al. Phyllosilicate-derived Ni catalysts with small nanoparticle size and strong metal-support interaction for efficient and robust decomposition of ammonia . | APPLIED CATALYSIS A-GENERAL , 2023 , 664 . |
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Catalytic methane decomposition is a promising way to convert methane into COx-free hydrogen and value-added carbon nanomaterials, but the development of a sintering -resistant catalyst is a challenge. In this study, Ni-Ga/Al2O3 alloy catalysts with different Ga/Ni atomic ratios were prepared from Ni3_xGaxAl (x = 0-1.2) hydrotalcite-like com-pounds (HTlcs) as precursors and tested for methane decomposition. Structural and physicochemical properties of the as-prepared and used catalysts were characterized by ICP, N2 physical adsorption, XRD, H2-TPR, H2 chemisorption, STEM-EDX, SEM, TEM, and Raman techniques. The results indicate that upon calcination at 500 degrees C, Ni-Ga-Al HTlcs are transferred to rock-salt Ni(Ga,Al)O oxide solid solutions, and reduction with H2 at 800 degrees C leads to single-phase and composition-uniform Ni-Ga alloy particles with an average crystal size of 8-10 nm. In catalytic methane decomposition at 600 degrees C, the alloying Ni with a suitable amount of Ga effectively enhances the catalyst life and carbon yield. Especially, Ni2.4Ga0.6Al shows the highest carbon yield of 61.1 g-C/g-cat, approximately 4.4 times that of the Ga-free Ni counterpart. Meanwhile, Ni-Ga alloying has a marked influence on the CNTs geometry, giving herringbone-like CNTs with small diameters and thin walls. It is gratifying to find that the Ni-Ga/Al2O3 catalyst exhibits good resistance against sintering under the adopted reaction condition, which accounts for the formation of uniform CNTs of smaller size. The findings provide guidelines for the control of carbon morphology and geometric size in methane decomposition.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Keyword ：
Carbon nanotubes Carbon nanotubes Catalytic methane decomposition Catalytic methane decomposition COx-free hydrogen COx-free hydrogen Hydrotalcite-like compounds Hydrotalcite-like compounds Nickel-gallium alloy Nickel-gallium alloy
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| GB/T 7714 | Lin, Xingyi , Huang, Min , Zhu, Hong et al. Hydrotalcite-derived nickel-gallium alloy catalysts with enhanced resistance against metal sintering for methane decomposition [J]. | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2023 , 48 (27) : 10016-10031 . |
| MLA | Lin, Xingyi et al. "Hydrotalcite-derived nickel-gallium alloy catalysts with enhanced resistance against metal sintering for methane decomposition" . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 48 . 27 (2023) : 10016-10031 . |
| APA | Lin, Xingyi , Huang, Min , Zhu, Hong , Wan, Chunsheng , Li, Dalin , Jiang, Lilong . Hydrotalcite-derived nickel-gallium alloy catalysts with enhanced resistance against metal sintering for methane decomposition . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2023 , 48 (27) , 10016-10031 . |
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3D printing technology can rapidly transform digital model into physical realization, and has been widely studied in many fields. However, its developments are very slow in the fields of catalysis and reaction engineering, due to harsh application environments. Here, we report that metal 3D printing is used to prepare Nickel-based Self-Catalytic Reactor (Ni-SCR) for COx methanation. The optimized Ni-SCR samples exhibit unique surface properties. The catalytic results reveal that they also possess premium methanation performance. This work will facilitate the developments both in 3D printing technologies and novel catalytic systems.
Keyword ：
CO2 methanation CO2 methanation CO methanation CO methanation metal 3D printing metal 3D printing Nickel-based Self-Catalytic Reactor Nickel-based Self-Catalytic Reactor
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| GB/T 7714 | Wang, Chengwei , Peng, Xiaobo , He, Yingluo et al. Metal 3D Printed Nickel-Based Self-Catalytic Reactor for COx Methanation [J]. | CHEMCATCHEM , 2022 , 14 (12) . |
| MLA | Wang, Chengwei et al. "Metal 3D Printed Nickel-Based Self-Catalytic Reactor for COx Methanation" . | CHEMCATCHEM 14 . 12 (2022) . |
| APA | Wang, Chengwei , Peng, Xiaobo , He, Yingluo , Fan, Jiaqi , Lin, Xingyi , Jiang, Lilong et al. Metal 3D Printed Nickel-Based Self-Catalytic Reactor for COx Methanation . | CHEMCATCHEM , 2022 , 14 (12) . |
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The alloying of Ru with rare-earth elements (REEs) is an effective approach for the modification of the electronic structure of Ru. Here, for the first time, we report the formation of Ru-M (M = La or Y) alloys that are endowed with a completely new type of active sites. Over the Ru-M (M = La or Y) catalysts, N-2 activation in ammonia synthesis follows neither the well-known dissociative nor the associative route but rather a co-operation of both, leading to outstanding performance. The developed RuLa/HZ catalyst exhibits a NH3 synthesis rate of 14.73 mmol gcat(-1) h(-1) at 400 degrees C and 1 MPa without obvious deactivation in a run of 1756 h (ca.73 days). (C) 2021 Elsevier Ltd. All rights reserved.
Keyword ：
Ammonia synthesis Ammonia synthesis DFT calculation DFT calculation Integration of the dissociative and associative mechanism Integration of the dissociative and associative mechanism Maximization of electronic effect Maximization of electronic effect Ru-M (M=La or Y) alloying Ru-M (M=La or Y) alloying
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| GB/T 7714 | Zhang, Tianhua , Zhu, Jie , Wang, Junjie et al. Ru alloying with La or Y for ammonia synthesis via integrated dissociative and associative mechanism with superior operational stability [J]. | CHEMICAL ENGINEERING SCIENCE , 2022 , 252 . |
| MLA | Zhang, Tianhua et al. "Ru alloying with La or Y for ammonia synthesis via integrated dissociative and associative mechanism with superior operational stability" . | CHEMICAL ENGINEERING SCIENCE 252 (2022) . |
| APA | Zhang, Tianhua , Zhu, Jie , Wang, Junjie , Peng, Xuanbei , Deng, Jinxiu , Wang, Shiyao et al. Ru alloying with La or Y for ammonia synthesis via integrated dissociative and associative mechanism with superior operational stability . | CHEMICAL ENGINEERING SCIENCE , 2022 , 252 . |
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NieCo/Mg(Al)O alloy catalysts with different Co/Ni molar ratios have been prepared from Ni-and Co-substituted Mg-Al hydrotalcite-like compounds (HTlcs) as precursors and tested for dry reforming of methane. The XRD characterization shows that Ni-Co-Mg-Al HTlcs are decomposedby calcination into Mg(Ni,Co,Al)O solid solution, and by reduction finely dispersed alloy particles are formed. H-2-TPR indicates a strong interaction between nickel/cobalt oxides and magnesia, and the presence of cobalt in Mg(Ni,Co,Al)O enhances the metal-support interaction. STEM-EDX analysis reveals that nickel and cobalt cations are homogeneously distributed in the HTlcs precursor and in the derived solid solution, and by reduction the resulting Ni-Co alloy particles are composition-uniform. The Ni-Co/Mg(Al)O alloy catalysts exhibit relatively high activity and stability at severe conditions, i.e., a medium temperature of 600 degrees C and a high space velocity of 120000 mL g(-1) h(-1). In comparison to monometallic Ni catalyst, NieCo alloying effectively inhibits methane decomposition and coke deposition, leading to a marked enhancement of catalytic stability. From CO2-TPD and TPSR, it is suggested that alloying Ni with Co favors the CO2 adsorption/activation and promotes the elimination of carbon species, thus improving the coke resistance. Furthermore, a high and stable activity with low coking is demonstrated at 750 degrees C. The hydrotalcite-derived Ni-Co/Mg(Al)O catalysts show better catalytic performance than many of the reported Ni-Co catalysts, which can be attributed to the formation of Ni-Co alloy with uniform composition, proper size, and strong metal-support interaction as well as the presence of basic Mg(Al)O as support. (C) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Keyword ：
Dry reforming of methane Dry reforming of methane Hydrotalcite-like compounds Hydrotalcite-like compounds Nickel-cobalt alloy Nickel-cobalt alloy
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| GB/T 7714 | Duan, Xiaoxuan , Pan, Jinhua , Yang, Xinru et al. Nickel.cobalt bimetallic catalysts prepared from hydrotalcite-like compounds for dry reforming of methane [J]. | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2022 , 47 (58) : 24358-24373 . |
| MLA | Duan, Xiaoxuan et al. "Nickel.cobalt bimetallic catalysts prepared from hydrotalcite-like compounds for dry reforming of methane" . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 47 . 58 (2022) : 24358-24373 . |
| APA | Duan, Xiaoxuan , Pan, Jinhua , Yang, Xinru , Wan, Chunsheng , Lin, Xingyi , Li, Dalin et al. Nickel.cobalt bimetallic catalysts prepared from hydrotalcite-like compounds for dry reforming of methane . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2022 , 47 (58) , 24358-24373 . |
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Support effects always attract extensive interesting in heterogenous catalysis. However, the same supports might not show same effects on different catalytic reactions, even the opposite. Here, we quantitatively analyzed the role of the percentage of {001} facets toward the water-gas shift (WGS) catalytic performances over Au-TiO2 catalysts. With increasing HF, the percentage of {001} gradually increase, while their catalytic activities gradually decrease following the sequence: Au-TiO2-HF0 > Au-TiO2-HF3 > Au-TiO2-HF9. For cyclic stability, Au-TiO2-HF0 showing somewhat low stability is due to increase in percentage of {001}, while Au-TiO2-HF3 and Au-TiO2-HF9 having high stability is because of decrease in the percentage of {001} albeit Au particle sintering. Accordingly, WGS activities of both fresh and used catalysts have good linear correlation with the percentage of {001} (negative correlation), the percentage of oxidized gold species (positive correlation) and the hydrogen consumption (positive correlation).
Keyword ：
Crystal facets Crystal facets Gold catalysts Gold catalysts Support effect Support effect TiO2 TiO2 Water-gas shift reaction Water-gas shift reaction
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| GB/T 7714 | Pang, Qianqian , Zhong, Xiaohong , Yan, Wensi et al. Role of percentage of {001} crystal facets in TiO2 supports toward the water-gas shift reaction over Au-TiO2 catalysts [J]. | CHEMICAL ENGINEERING JOURNAL , 2022 , 446 . |
| MLA | Pang, Qianqian et al. "Role of percentage of {001} crystal facets in TiO2 supports toward the water-gas shift reaction over Au-TiO2 catalysts" . | CHEMICAL ENGINEERING JOURNAL 446 (2022) . |
| APA | Pang, Qianqian , Zhong, Xiaohong , Yan, Wensi , Ma, Hui , Ren, Hongju , Song, Li et al. Role of percentage of {001} crystal facets in TiO2 supports toward the water-gas shift reaction over Au-TiO2 catalysts . | CHEMICAL ENGINEERING JOURNAL , 2022 , 446 . |
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Composition-uniform Ni-Cu/Al2O3 alloy catalysts have been prepared from Ni-Cu-Al hydrotalcite-like compounds (HTlcs) and tested for methane decomposition at 650 degrees C. The catalysts were characterized by XRD, XPS, H-2 chemisorption, H-2-TPR, STEM-EDX, SEM, TEM, and Raman. The characterizations reveal that calcination of Ni-Cu-Al HTlcs leads to Ni(Cu,Al)O oxide solid solution, both nickel and copper ions being homogeneously distributed in HTlcs as well as in Ni(Cu,Al)O, and upon reduction the well-mixed Cu2+/Ni2+ species are step-wise reduced to form composition-uniform Ni-Cu alloy with an average size of 9.5-10.4 nm. Alloying Ni with an appropriate amount of Cu remarkably enhances the catalytic life and carbon yield. The highest carbon yield of 132.9 g-C/g-cat is obtained at atomic ratio of Ni:Cu = 7:3, which is about 78 times that of the Ni/Al2O3 counterpart. Moreover, carbon morphology is changed from thin CNTs to thick fishbone-CNFs and platelet-CNFs depending on the copper content. Under the reaction atmosphere, Ni-Cu alloy is sintered to large particles by contact with methane. It is suggested that Ni-Cu alloying favors the formation of large alloy particles, which inhibits methane dissociation and enhances carbon bulk diffusion, thus facilitating the CNFs growth and leading to a significant increase of carbon yield.
Keyword ：
Catalytic methane decomposition Catalytic methane decomposition Controlled preparation Controlled preparation COx-free hydrogen COx-free hydrogen Hydrotalcite-like compounds Hydrotalcite-like compounds Nickel-copper alloy Nickel-copper alloy
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| GB/T 7714 | Lin, Xingyi , Zhu, Hong , Huang, Min et al. Controlled preparation of Ni-Cu alloy catalyst via hydrotalcite-like precursor and its enhanced catalytic performance for methane decomposition [J]. | FUEL PROCESSING TECHNOLOGY , 2022 , 233 . |
| MLA | Lin, Xingyi et al. "Controlled preparation of Ni-Cu alloy catalyst via hydrotalcite-like precursor and its enhanced catalytic performance for methane decomposition" . | FUEL PROCESSING TECHNOLOGY 233 (2022) . |
| APA | Lin, Xingyi , Zhu, Hong , Huang, Min , Wan, Chunsheng , Li, Dalin , Jiang, Lilong . Controlled preparation of Ni-Cu alloy catalyst via hydrotalcite-like precursor and its enhanced catalytic performance for methane decomposition . | FUEL PROCESSING TECHNOLOGY , 2022 , 233 . |
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Ammonia synthesis is structure sensitive, and a minute change in the catalyst structure would cause a dramatic change in activity. To date, none of the studies reveal the metal size effect at a subnanometer scale on NH3 synthesis, and such investigation remains a challenge. Here, we report the synthesis of Ru catalysts with sizes ranging from single atoms, atomic clusters (ACCs), sub-nanometric clusters, to nanoparticles (NPs) by adjusting precursor and/or loading of Ru. Sub-nanometric Ru catalysts not only exhibit performance different from that of NPs but also follow a different route for N-2 activation. The strong intra-cluster interaction of Ru atomic clusters enables the formation of strong interactions of Ru d-orbitals with the sigma and pi orbitals of N-2 molecules, resulting in N-2 activation over Ru ACCs to occur more easily than that over Ru NPs. Consequently, Ru ACCs display an unprecedentedly high NH3 synthesis rate and large turnover frequency at mild conditions.
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| GB/T 7714 | Li, Lingling , Jiang, Ya-Fei , Zhang, Tianhua et al. Size sensitivity of supported Ru catalysts for ammonia synthesis: From nanoparticles to subnanometric clusters and atomic clusters [J]. | CHEM , 2022 , 8 (3) : 749-768 . |
| MLA | Li, Lingling et al. "Size sensitivity of supported Ru catalysts for ammonia synthesis: From nanoparticles to subnanometric clusters and atomic clusters" . | CHEM 8 . 3 (2022) : 749-768 . |
| APA | Li, Lingling , Jiang, Ya-Fei , Zhang, Tianhua , Cai, Hongfang , Zhou, Yanliang , Lin, Bingyu et al. Size sensitivity of supported Ru catalysts for ammonia synthesis: From nanoparticles to subnanometric clusters and atomic clusters . | CHEM , 2022 , 8 (3) , 749-768 . |
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Identifying optimal Ru size in NH3 synthesis can improve reaction activity and maximize the utilization of Ru to reduce catalyst cost. However, previous researches are focused on large Ru particle size (>= 2 nm) while that below 2 nm in NH3 synthesis is unclear. Here we synthesized a series of Rux/BaCeO3 with different Ru sizes (x = 1.1-3.0 nm) through size-controlled Ru colloid. With the decrease of Ru size, NH3 synthesis rate over Ru-1.1/BaCeO3 increases to 19.4 mmol g(cat)(-1)h(-1) at 400 degrees C and 1 MPa, which is 5.7 times that of Ru-3.0/BaCeO3 and superior to most of Ru-based catalysts previously reported. It reveals that the reduction of Ru size enhances the generation of Ce3+ and oxygen vacancies in BaCeO3, which can donate electron to Ru centers and promote N-2 dissociation. Moreover, the small Ru size enhances hydrogen spillover from Ru to BaCeO3 to alleviate hydrogen poisoning, resulting in efficient NH3 synthesis. (C) 2021 Elsevier Inc. All rights reserved.
Keyword ：
Ammonia synthesis Ammonia synthesis Ce3+ and oxygen vacancies Ce3+ and oxygen vacancies Electron transfer Electron transfer Hydrogen spillover Hydrogen spillover Size-dependent Size-dependent
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| GB/T 7714 | Zhou, Yanliang , Wang, Junjie , Liang, Lili et al. Unraveling the size-dependent effect of Ru-based catalysts on Ammonia synthesis at mild conditions [J]. | JOURNAL OF CATALYSIS , 2021 , 404 : 501-511 . |
| MLA | Zhou, Yanliang et al. "Unraveling the size-dependent effect of Ru-based catalysts on Ammonia synthesis at mild conditions" . | JOURNAL OF CATALYSIS 404 (2021) : 501-511 . |
| APA | Zhou, Yanliang , Wang, Junjie , Liang, Lili , Sai, Qianjin , Ni, Jun , Au, Chak-tong et al. Unraveling the size-dependent effect of Ru-based catalysts on Ammonia synthesis at mild conditions . | JOURNAL OF CATALYSIS , 2021 , 404 , 501-511 . |
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