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Ma R, Huang W, Hu Q, Tian G, An J, Fang T, Liu J, Hou J, Zhao M, Sun L. Tandemly duplicated MYB genes are functionally diverged in the regulation of anthocyanin biosynthesis in soybean. Plant Physiol 2024; 194:2549-2563. [PMID: 38235827 DOI: 10.1093/plphys/kiae019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 11/13/2023] [Accepted: 12/20/2023] [Indexed: 01/19/2024]
Abstract
Gene duplications have long been recognized as a driving force in the evolution of genes, giving rise to novel functions. The soybean (Glycine max) genome is characterized by a large number of duplicated genes. However, the extent and mechanisms of functional divergence among these duplicated genes in soybean remain poorly understood. In this study, we revealed that 4 MYB genes (GmMYBA5, GmMYBA2, GmMYBA1, and Glyma.09g235000)-presumably generated by tandem duplication specifically in the Phaseoleae lineage-exhibited a stronger purifying selection in soybean compared to common bean (Phaseolus vulgaris). To gain insights into the diverse functions of these tandemly duplicated MYB genes in anthocyanin biosynthesis, we examined the expression, transcriptional activity, induced metabolites, and evolutionary history of these 4 MYB genes. Our data revealed that Glyma.09g235000 is a pseudogene, while the remaining 3 MYB genes exhibit strong transcriptional activation activity, promoting anthocyanin biosynthesis in different soybean tissues. GmMYBA5, GmMYBA2, and GmMYBA1 induced anthocyanin accumulation by upregulating the expression of anthocyanin pathway-related genes. Notably, GmMYBA5 showed a lower capacity for gene induction compared to GmMYBA2 and GmMYBA1. Metabolomics analysis further demonstrated that GmMYBA5 induced distinct anthocyanin accumulation in Nicotiana benthamiana leaves and soybean hairy roots compared to GmMYBA2 and GmMYBA1, suggesting their functional divergence leading to the accumulation of different metabolites accumulation following gene duplication. Together, our data provide evidence of functional divergence within the MYB gene cluster following tandem duplication, which sheds light on the potential evolutionary directions of gene duplications during legume evolution.
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Affiliation(s)
- Ruirui Ma
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Wenxuan Huang
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Quan Hu
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Guo Tian
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Jie An
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Ting Fang
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Jia Liu
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Jingjing Hou
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Meixia Zhao
- Department of Microbiology and Cell Science, University of Florida, Gainesville, FL 32611, USA
| | - Lianjun Sun
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
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2
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Feng Y, Fu F, Zeng L, Zhao M, Xin X, Liang J, Zhou M, Fang X, Lv H, Yang GY. Atomically Precise Silver Clusters Stabilized by Lacunary Polyoxometalates with Photocatalytic CO 2 Reduction Activity. Angew Chem Int Ed Engl 2024; 63:e202317341. [PMID: 38153620 DOI: 10.1002/anie.202317341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/21/2023] [Accepted: 12/28/2023] [Indexed: 12/29/2023]
Abstract
The syntheses of atomically precise silver (Ag) clusters stabilized by multidentate lacunary polyoxometalate (POM) ligands have been emerging as a promising but challenging research direction, the combination of redox-active POM ligands and silver clusters will render them unexpected geometric structures and catalytic properties. Herein, we report the successful construction of two structurally-new lacunary POM-stabilized Ag clusters, TBA6 H14 Ag14 (DPPB)4 (CH3 CN)9 [Ag24 (Si2 W18 O66 )3 ] ⋅ 10CH3 CN ⋅ 9H2 O ({Ag24 (Si2 W18 O66 )3 }, TBA=tetra-n-butylammonium, DPPB=1,4-Bis(diphenylphosphino)butane) and TBA14 H6 Ag9 Na2 (H2 O)9 [Ag27 (Si2 W18 O66 )3 ] ⋅ 8CH3 CN ⋅ 10H2 O ({Ag27 (Si2 W18 O66 )3 }), using a facile one-pot solvothermal approach. Under otherwise identical synthetic conditions, the molecular structures of two POM-stabilized Ag clusters could be readily tuned by the addition of different organic ligands. In both compounds, the central trefoil-propeller-shaped {Ag24 }14+ and {Ag27 }17+ clusters bearing 10 delocalized valence electrons are stabilized by three C-shaped {Si2 W18 O66 } units. The femtosecond/nanosecond transient absorption spectroscopy revealed the rapid charge transfer between {Ag24 }14+ core and {Si2 W18 O66 } ligands. Both compounds have been pioneeringly investigated as catalysts for photocatalytic CO2 reduction to HCOOH with a high selectivity.
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Affiliation(s)
- Yeqin Feng
- MOE Key Laboratory of Cluster Science, Beijing Key Laboratory of Photoelectroic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Fangyu Fu
- MOE Key Laboratory of Cluster Science, Beijing Key Laboratory of Photoelectroic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Linlin Zeng
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Mengyun Zhao
- MOE Key Laboratory of Cluster Science, Beijing Key Laboratory of Photoelectroic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Xing Xin
- MOE Key Laboratory of Cluster Science, Beijing Key Laboratory of Photoelectroic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Jiakai Liang
- MOE Key Laboratory of Cluster Science, Beijing Key Laboratory of Photoelectroic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Meng Zhou
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xikui Fang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Hongjin Lv
- MOE Key Laboratory of Cluster Science, Beijing Key Laboratory of Photoelectroic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Guo-Yu Yang
- MOE Key Laboratory of Cluster Science, Beijing Key Laboratory of Photoelectroic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
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3
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Qian Q, Zhu Y, Ahmad N, Feng Y, Zhang H, Cheng M, Liu H, Xiao C, Zhang G, Xie Y. Recent Advancements in Electrochemical Hydrogen Production via Hybrid Water Splitting. Adv Mater 2024; 36:e2306108. [PMID: 37815215 DOI: 10.1002/adma.202306108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 09/20/2023] [Indexed: 10/11/2023]
Abstract
As one of the most promising approaches to producing high-purity hydrogen (H2 ), electrochemical water splitting powered by the renewable energy sources such as solar, wind, and hydroelectric power has attracted considerable interest over the past decade. However, the water electrolysis process is seriously hampered by the sluggish electrode reaction kinetics, especially the four-electron oxygen evolution reaction at the anode side, which induces a high reaction overpotential. Currently, the emerging hybrid electrochemical water splitting strategy is proposed by integrating thermodynamically favorable electro-oxidation reactions with hydrogen evolution reaction at the cathode, providing a new opportunity for energy-efficient H2 production. To achieve highly efficient and cost-effective hybrid water splitting toward large-scale practical H2 production, much work has been continuously done to exploit the alternative anodic oxidation reactions and cutting-edge electrocatalysts. This review will focus on recent developments on electrochemical H2 production coupled with alternative oxidation reactions, including the choice of anodic substrates, the investigation on electrocatalytic materials, and the deep understanding of the underlying reaction mechanisms. Finally, some insights into the scientific challenges now standing in the way of future advancement of the hybrid water electrolysis technique are shared, in the hope of inspiring further innovative efforts in this rapidly growing field.
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Affiliation(s)
- Qizhu Qian
- Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China Hefei, Anhui, 230026, P. R. China
| | - Yin Zhu
- Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China Hefei, Anhui, 230026, P. R. China
| | - Nazir Ahmad
- Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China Hefei, Anhui, 230026, P. R. China
| | - Yafei Feng
- Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China Hefei, Anhui, 230026, P. R. China
| | - Huaikun Zhang
- Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China Hefei, Anhui, 230026, P. R. China
| | - Mingyu Cheng
- Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China Hefei, Anhui, 230026, P. R. China
| | - Huanhuan Liu
- Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China Hefei, Anhui, 230026, P. R. China
| | - Chong Xiao
- Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China Hefei, Anhui, 230026, P. R. China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui, 230031, P. R. China
| | - Genqiang Zhang
- Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China Hefei, Anhui, 230026, P. R. China
| | - Yi Xie
- Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China Hefei, Anhui, 230026, P. R. China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui, 230031, P. R. China
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4
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Wang B, Zhang Y. Asymmetric connections with starburst amacrine cells underlie the upward motion selectivity of J-type retinal ganglion cells. PLoS Biol 2023; 21:e3002301. [PMID: 37721959 PMCID: PMC10538761 DOI: 10.1371/journal.pbio.3002301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 09/28/2023] [Accepted: 08/17/2023] [Indexed: 09/20/2023] Open
Abstract
Motion is an important aspect of visual information. The directions of visual motion are encoded in the retina by direction-selective ganglion cells (DSGCs). ON-OFF DSGCs and ON DSGCs co-stratify with starburst amacrine cells (SACs) in the inner plexiform layer and depend on SACs for their direction selectivity. J-type retinal ganglion cells (J-RGCs), a type of OFF DSGCs in the mouse retina, on the other hand, do not co-stratify with SACs, and how direction selectivity in J-RGCs emerges has not been understood. Here, we report that both the excitatory and inhibitory synaptic inputs to J-RGCs are direction-selective (DS), with the inhibitory inputs playing a more important role for direction selectivity. The DS inhibitory inputs come from SACs, and the functional connections between J-RGCs and SACs are spatially asymmetric. Thus, J-RGCs and SACs form functionally important synaptic contacts even though their dendritic arbors show little overlap. These findings underscore the need to look beyond the neurons' stratification patterns in retinal circuit studies. Our results also highlight the critical role of SACs for retinal direction selectivity.
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Affiliation(s)
- Bo Wang
- Institute of Neuroscience, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, China
| | - Yifeng Zhang
- Institute of Neuroscience, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, China
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5
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Feng Y, He X, Cheng M, Zhu Y, Wang W, Zhang Y, Zhang H, Zhang G. Selective Adsorption Behavior Modulation on Nickel Selenide by Heteroatom Implantation and Heterointerface Construction Achieves Efficient Co-production of H 2 and Formate. Small 2023; 19:e2301986. [PMID: 37096917 DOI: 10.1002/smll.202301986] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 03/24/2023] [Indexed: 05/03/2023]
Abstract
Glycerol-assisted hybrid water electrolysis is a potential strategy to achieve energy-efficient hydrogen production. However, the design of an efficient catalyst for the specific reaction is still a key challenge, which suffers from the barrier of regulating the adsorption characteristics of distinctive intermediates in different reactions. Herein, a novel rationale that achieves selective adsorption behavior modulation for self-supported nickel selenide electrode by heteroatom implantation and heterointerface construction through electrodeposition is developed, which can realize nichetargeting optimization on hydrogen evolution reaction (HER) and glycerol oxidation reaction (GOR), respectively. Specifically, the prepared Mo-doped Ni3 Se2 electrode exhibits superior catalytic activity for HER, while the NiSe-Ni3 Se2 electrode exhibits high Faradaic efficiency (FE) towards formate production for GOR. A two-electrode electrolyzer exhibits superb activity that only needs an ultralow cell voltage of 1.40 V to achieve 40 mA cm-2 with a high FE (97%) for formate production. Theoretical calculation unravels that the introduction of molybdenum contributes to the deviation of the d-band center of Ni3 Se2 from the Fermi level, which is conducive to hydrogen desorption. Meanwhile, the construction of the heterojunction induces the distortion of the surface structure of nickel selenide, which exposes highly active nickel sites for glycerol adsorption, thus contributing to the excellent electrocatalytic performance.
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Affiliation(s)
- Yafei Feng
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Xiaoyue He
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Mingyu Cheng
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Yin Zhu
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Wentao Wang
- Guizhou Provincial Key Laboratory of Computational Nano-Material Science Guizhou Education University, Guiyang, 550018, China
| | - Yangyang Zhang
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Huaikun Zhang
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Genqiang Zhang
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
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6
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Runlin H, Chaoyue W, Congcong B, Hanli W. Facile preparation of high performance GO/Mn 3O 4/PVDF composite membranes with intercalation of manganese oxide nanowires. RSC Adv 2023; 13:19002-19010. [PMID: 37362331 PMCID: PMC10285357 DOI: 10.1039/d3ra02594b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 06/17/2023] [Indexed: 06/28/2023] Open
Abstract
Polyvinylidene fluoride (PVDF) has been widely studied and applied in separation membranes due to its high thermal and chemical stability and mechanical strength. However, PVDF has strong hydrophobicity, resulting in easy contamination of the membrane surface and fast flux attenuation, so it is necessary to modify the membrane surface to improve its separation selectivity and service life. In this paper, PVDF microporous membrane was used as the matrix material and graphene oxide (GO) as the separation layer material. The GO/Mn3O4/PVDF composite membrane was prepared by layer self-assembly of GO nanosheets, and the functional layer spacing was adjusted by nanometer Mn3O4 intercalation. The prepared composite membrane showed high flux and separation selectivity in the filtration of organic compounds. The results showed that the rejection of methylene blue increased from 34% to 99.5%, and the flux decreased from 3000 L m-2 h-1 to 95 L m-2 h-1 when GO nanosheets covered the PVDF supporting membrane. After the introduction of Mn3O4 nanowires in the GO interlayer, the dye rejection reached 99.9% and the flux reached 612 L m-2 h-1. Compared with the unintercalated composite membranes, the flux of the prepared composite membranes showed good stability in the treatment of methylene blue, and the rejection remained unchanged.
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Affiliation(s)
- Han Runlin
- School of Chemistry and Chemical Engineering, Jinggangshan University Ji'an 343009 China
| | - Wang Chaoyue
- School of Chemistry and Chemical Engineering, Jinggangshan University Ji'an 343009 China
| | - Bi Congcong
- Shandong Huaxia Shenzhou New Material Co., Ltd. Zibo 256400 China
| | - Wang Hanli
- Shandong Huaxia Shenzhou New Material Co., Ltd. Zibo 256400 China
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7
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Li Y, Wang W, Cheng M, Feng Y, Han X, Qian Q, Zhu Y, Zhang G. Arming Ru with Oxygen-Vacancy-Enriched RuO 2 Sub-Nanometer Skin Activates Superior Bifunctionality for pH-Universal Overall Water Splitting. Adv Mater 2023; 35:e2206351. [PMID: 36609998 DOI: 10.1002/adma.202206351] [Citation(s) in RCA: 31] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 11/21/2022] [Indexed: 06/16/2023]
Abstract
Water electrolysis has been expected to assimilate the renewable yet intermediate energy-derived electricity for green H2 production. However, current benchmark anodic catalysts of Ir/Ru-based compounds suffer severely from poor dissolution resistance. Herein, an effective modification strategy is proposed by arming a sub-nanometer RuO2 skin with abundant oxygen vacancies to the interconnected Ru clusters/carbon hybrid microsheet (denoted as Ru@V-RuO2 /C HMS), which can not only inherit the high hydrogen evolution reaction (HER) activity of the Ru, but more importantly, activate the superior activity toward the oxygen evolution reaction (OER) in both acid and alkaline conditions. Outstandingly, it can achieve an ultralow overpotential of 176/201 mV for OER and 46/6 mV for the HER to reach 10 mA cm-2 in acidic and alkaline solution, respectively. Inspiringly, the overall water splitting can be driven with an ultrasmall cell voltage of 1.467/1.437 V for 10 mA cm-2 in 0.5 m H2 SO4 /1.0 m KOH, respectively. Density functional theory calculations reveal that armoring the oxygen-vacancy-enriched RuO2 exoskeleton can cooperatively alter the interfacial electronic structure and make the adsorption behavior of hydrogen and oxygen intermediates much close to the ideal level, thus simultaneously speeding up the hydrogen evolution kinetics and decreasing the energy barrier of oxygen release.
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Affiliation(s)
- Yapeng Li
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Wentao Wang
- Guizhou Provincial Key Laboratory of Computational Nano-Material Science, Guizhou Education University, Guiyang, 550018, P. R. China
| | - Mingyu Cheng
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Yafei Feng
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Xiao Han
- Center of Advanced Nanocatalysis (CAN), Department of Applied Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Qizhu Qian
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Yin Zhu
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Genqiang Zhang
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
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8
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Zhang JX, Yang PF, Shu W. Access to dialkylated allylic stereogenic centers by Ni-catalysed enantioselective hydrovinylation of unactivated alkenes. Chem Sci 2022; 13:11405-11410. [PMID: 36320572 PMCID: PMC9533468 DOI: 10.1039/d2sc04350e] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 09/12/2022] [Indexed: 07/22/2023] Open
Abstract
Tertiary dialkylated allylic stereogenic centers are widespread substructures in bioactive molecules and natural products. However, enantioselective access to dialkyl substituted allylic motifs remains a long-term challenge. Herein, a straightforward protocol to build allylic dialkylated stereogenic centers enabled by nickel-catalysed regio- and enantioselective hydrovinylation of isolated unactivated alkenes facilitated by a weakly coordinating group with vinyl bromides was developed, affording dialkylated allylic species in good yields with excellent enantioselectivities. The reaction distinguishes distinct alkenes and works for both terminal and internal aliphatic alkenes. The reaction proceeds under mild conditions and tolerates a wide range of functional groups.
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Affiliation(s)
- Jian-Xin Zhang
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology Shenzhen 518055 Guangdong P. R. China
| | - Peng-Fei Yang
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology Shenzhen 518055 Guangdong P. R. China
| | - Wei Shu
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology Shenzhen 518055 Guangdong P. R. China
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9
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Lei J, Gao Z, Tang L, Zhong L, Li J, Zhang Y, Liu T. Coupling Water-Proof Li Anodes with LiOH-Based Cathodes Enables Highly Rechargeable Lithium-Air Batteries Operating in Ambient Air. Adv Sci (Weinh) 2022; 9:e2103760. [PMID: 34894094 PMCID: PMC8811808 DOI: 10.1002/advs.202103760] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/28/2021] [Indexed: 05/06/2023]
Abstract
Realizing an energy-dense, highly rechargeable nonaqueous lithium-oxygen battery in ambient air remains a big challenge because the active materials of the typical high-capacity cathode (Li2 O2 ) and anode (Li metal) are unstable in air. Herein, a novel lithium-oxygen full cell coupling a lithium anode protected by a composite layer of polyethylene oxide (PEO)/lithium aluminum titanium phosphate (LATP)/wax to a LiOH-based cathode is constructed. The protected lithium is stable in air and water, and permits reversible, dendrite-free lithium stripping/plating in a wet nonaqueous electrolyte under ambient air. The LiOH-based full cell reaction is immune to moisture (up to 99% humidity) in air and exhibits a much better resistance to CO2 contamination than Li2 O2 , resulting in a more consistent electrochemistry in the long term. The current approach of coupling a protected lithium anode with a LiOH-based cathode holds promise for developing a long-life, high-energy lithium-air battery capable of operating in the ambient atmosphere.
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Affiliation(s)
- Jiang Lei
- Shanghai Key Laboratory of Chemical Assessment and SustainabilitySchool of Chemical Science and EngineeringTongji UniversityNo. 1239, Siping RoadShanghai200092P. R. China
| | - Zongyan Gao
- Shanghai Key Laboratory of Chemical Assessment and SustainabilitySchool of Chemical Science and EngineeringTongji UniversityNo. 1239, Siping RoadShanghai200092P. R. China
| | - Linbin Tang
- Shanghai Key Laboratory of Chemical Assessment and SustainabilitySchool of Chemical Science and EngineeringTongji UniversityNo. 1239, Siping RoadShanghai200092P. R. China
| | - Li Zhong
- SEU‐FEI Nano‐Pico CenterKey Laboratory of MEMS of Ministry of EducationSoutheast UniversityNanjing210096P. R. China
| | - Junjian Li
- Shanghai Key Laboratory of Chemical Assessment and SustainabilitySchool of Chemical Science and EngineeringTongji UniversityNo. 1239, Siping RoadShanghai200092P. R. China
| | - Yue Zhang
- Shanghai Key Laboratory of Chemical Assessment and SustainabilitySchool of Chemical Science and EngineeringTongji UniversityNo. 1239, Siping RoadShanghai200092P. R. China
| | - Tao Liu
- Shanghai Key Laboratory of Chemical Assessment and SustainabilitySchool of Chemical Science and EngineeringTongji UniversityNo. 1239, Siping RoadShanghai200092P. R. China
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10
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Zhydachevskyy Y, Hizhnyi Y, Nedilko SG, Kudryavtseva I, Pankratov V, Stasiv V, Vasylechko L, Sugak D, Lushchik A, Berkowski M, Suchocki A, Klyui N. Band Gap Engineering and Trap Depths of Intrinsic Point Defects in RAlO 3 (R = Y, La, Gd, Yb, Lu) Perovskites. J Phys Chem C Nanomater Interfaces 2021; 125:26698-26710. [PMID: 34925675 PMCID: PMC8672454 DOI: 10.1021/acs.jpcc.1c06573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 11/08/2021] [Indexed: 05/11/2023]
Abstract
The possibility of band gap engineering (BGE) in RAlO3 (R = Y, La, Gd, Yb, Lu) perovskites in the context of trap depths of intrinsic point defects was investigated comprehensively using experimental and theoretical approaches. The optical band gap of the materials, E g, was determined via both the absorption measurements in the VUV spectral range and the spectra of recombination luminescence excitation by synchrotron radiation. The experimentally observed effect of E g reduction from ∼8.5 to ∼5.5 eV in RAlO3 perovskites with increasing R3+ ionic radius was confirmed by the DFT electronic structure calculations performed for RMIIIO3 crystals (R = Lu, Y, La; MIII = Al, Ga, In). The possibility of BGE was also proved by the analysis of thermally stimulated luminescence (TSL) measured above room temperature for the far-red emitting (Y/Gd/La)AlO3:Mn4+ phosphors, which confirmed decreasing of the trap depths in the cation sequence Y → Gd → La. Calculations of the trap depths performed within the super cell approach for a number of intrinsic point defects and their complexes allowed recognizing specific trapping centers that can be responsible for the observed TSL. In particular, the electron traps of 1.33 and 1.43 eV (in YAlO3) were considered to be formed by the energy level of oxygen vacancy (VO) with different arrangement of neighboring YAl and VY, while shallower electron traps of 0.9-1.0 eV were related to the energy level of YAl antisite complexes with neighboring VO or (VO + VY). The effect of the lowering of electron trap depths in RAlO3 was demonstrated for the VO-related level of the (YAl + VO + VY) complex defect for the particular case of La substituting Y.
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Affiliation(s)
- Yaroslav Zhydachevskyy
- Institute
of Physics, Polish Academy of Sciences, aleja Lotników 32/46, Warsaw 02-668, Poland
- Lviv
Polytechnic National University, S. Bandera Str. 12, Lviv 79013, Ukraine
| | - Yuriy Hizhnyi
- Taras
Shevchenko National University of Kyiv, Volodymyrska Str. 60, Kyiv 01033, Ukraine
| | - Sergii G. Nedilko
- Taras
Shevchenko National University of Kyiv, Volodymyrska Str. 60, Kyiv 01033, Ukraine
| | - Irina Kudryavtseva
- Institute
of Physics, University of Tartu, W. Ostwald Str. 1, Tartu 50411, Estonia
| | - Vladimir Pankratov
- Institute
of Solid State Physics, University of Latvia, Kengaraga Str. 8, Riga 1063, Latvia
| | - Vasyl Stasiv
- Institute
of Physics, Polish Academy of Sciences, aleja Lotników 32/46, Warsaw 02-668, Poland
| | - Leonid Vasylechko
- Lviv
Polytechnic National University, S. Bandera Str. 12, Lviv 79013, Ukraine
| | - Dmytro Sugak
- Lviv
Polytechnic National University, S. Bandera Str. 12, Lviv 79013, Ukraine
| | - Aleksandr Lushchik
- Institute
of Physics, University of Tartu, W. Ostwald Str. 1, Tartu 50411, Estonia
| | - Marek Berkowski
- Institute
of Physics, Polish Academy of Sciences, aleja Lotników 32/46, Warsaw 02-668, Poland
| | - Andrzej Suchocki
- Institute
of Physics, Polish Academy of Sciences, aleja Lotników 32/46, Warsaw 02-668, Poland
| | - Nickolai Klyui
- College of
Physics, Jilin University, 2699 Qianjin Str., Changchun 130012, China
- V.E.
Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 41 prospekt Nauki, Kyiv 03028, Ukraine
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11
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Wang Z, Xin J, Wang Z, Yao Y, Zhao Y, Qian W. Brain functional network modeling and analysis based on fMRI: a systematic review. Cogn Neurodyn 2021; 15:389-403. [PMID: 34040667 PMCID: PMC8131458 DOI: 10.1007/s11571-020-09630-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 08/05/2020] [Accepted: 08/20/2020] [Indexed: 12/12/2022] Open
Abstract
In recent years, the number of patients with neurodegenerative diseases (i.e., Alzheimer's disease, Parkinson's disease, mild cognitive impairment) and mental disorders (i.e., depression, anxiety and schizophrenia) have increased dramatically. Researchers have found that complex network analysis can reveal the topology of brain functional networks, such as small-world, scale-free, etc. In the study of brain diseases, it has been found that these topologies have undergoed abnormal changes in different degrees. Therefore, the research of brain functional networks can not only provide a new perspective for understanding the pathological mechanism of neurological and psychiatric diseases, but also provide assistance for the early diagnosis. Focusing on the study of human brain functional networks, this paper reviews the research results in recent years. First, this paper introduces the background of the study of brain functional networks under complex network theory and the important role of topological properties in the study of brain diseases. Second, the paper describes how to construct a brain functional network using neural image data. Third, the common methods of functional network analysis, including network structure analysis and disease classification, are introduced. Fourth, the role of brain functional networks in pathological study, analysis and diagnosis of brain functional diseases is studied. Finally, the paper summarizes the existing studies of brain functional networks and points out the problems and future research directions.
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Affiliation(s)
- Zhongyang Wang
- College of Medicine and Biological Information Engineering, Northeastern University, Shenyang, China
| | - Junchang Xin
- School of Computer Science and Engineering, Northeastern University, Shenyang, China
- Key Laboratory of Big Data Management and Analytics (Liaoning Province), Northeastern University, Shenyang, China
| | - Zhiqiong Wang
- College of Medicine and Biological Information Engineering, Northeastern University, Shenyang, China
| | - Yudong Yao
- Department of Electrical and Computer Engineering, Stevens Institute of Technology, Hoboken, NJ USA
| | - Yue Zhao
- College of Medicine and Biological Information Engineering, Northeastern University, Shenyang, China
| | - Wei Qian
- College of Engineering, The University of Texas at El Paso, El Paso, TX USA
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12
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Ren L, Liang L, Zhang Z, Zhang Z, Xiong Q, Zhao N, Yu Y, Scopelliti R, Gao P. The roles of fused-ring organic semiconductor treatment on SnO 2 in enhancing perovskite solar cell performance. RSC Adv 2021; 11:3792-3800. [PMID: 35424335 PMCID: PMC8694149 DOI: 10.1039/d1ra00090j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 01/08/2021] [Indexed: 11/21/2022] Open
Abstract
It took only 11 years for the power conversion efficiency (PCE) of perovskite solar cells (PSCs) to increase from 3.8% to 25.2%. It is worth noting that, as a new thin-film solar cell technique, defect passivation at the interface is crucial for the PSCs. Decorating and passivating the interface between the perovskite and electron transport layer (ETL) is an effective way to suppress the recombination of carriers at the interface and improve the PCE of the device. In this work, several acceptor-donor-acceptor (A-D-A) type fused-ring organic semiconductors (FROS) with indacenodithiophene (IDT) or indacenodithienothiophene (IDDT) as the bridging donor moiety and 1,3-diethyl-2-thiobarbituric or 1,1-dicyromethylene-3-indanone as the strong electron-withdrawing units, were deposited on the SnO2 ETL to prepare efficient planar junction PSCs. The PCEs of the PSCs increased from 18.63% for the control device to 19.37%, 19.75%, and 19.32% after modification at the interface by three FROSs. Furthermore, impedance spectroscopy, steady-state and time-resolved photoluminescence spectra elucidated that the interface decorated by FROSs enhance not only the extraction of electrons but also the charge transportation at the interface between the perovskite and ETL. These results can provide significant insights in improving the perovskite/ETL interface and the photovoltaic performance of PSCs.
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Affiliation(s)
- Lu Ren
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences Fuzhou Fujian 350002 China
- University of Chinese Academy of Science Beijing 100049 China
- Laboratory for Advanced Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences Xiamen 361021 China
| | - Lusheng Liang
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences Fuzhou Fujian 350002 China
- Laboratory for Advanced Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences Xiamen 361021 China
| | - Zhuangzhuang Zhang
- Laboratory for Advanced Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences Xiamen 361021 China
| | - Zilong Zhang
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences Fuzhou Fujian 350002 China
- Laboratory for Advanced Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences Xiamen 361021 China
| | - Qiu Xiong
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences Fuzhou Fujian 350002 China
- University of Chinese Academy of Science Beijing 100049 China
- Laboratory for Advanced Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences Xiamen 361021 China
| | - Nan Zhao
- College of Materials Science and Engineering, Huaqiao University 361021 Xiamen China
| | - Yaming Yu
- College of Materials Science and Engineering, Huaqiao University 361021 Xiamen China
| | - Rosario Scopelliti
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL) CH-1015 Lausanne Switzerland
| | - Peng Gao
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences Fuzhou Fujian 350002 China
- University of Chinese Academy of Science Beijing 100049 China
- Laboratory for Advanced Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences Xiamen 361021 China
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13
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Li Y, Zhang J, Liu Y, Qian Q, Li Z, Zhu Y, Zhang G. Partially exposed RuP 2 surface in hybrid structure endows its bifunctionality for hydrazine oxidation and hydrogen evolution catalysis. Sci Adv 2020; 6:6/44/eabb4197. [PMID: 33115737 PMCID: PMC7608786 DOI: 10.1126/sciadv.abb4197] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Accepted: 09/11/2020] [Indexed: 05/12/2023]
Abstract
Replacing the sluggish anode reaction in water electrolysis with thermodynamically favorable hydrazine oxidation could achieve energy-efficient H2 production, while the shortage of bifunctional catalysts limits its scale development. Here, we presented the scalable one-pot synthesis of partially exposed RuP2 nanoparticle-decorated carbon porous microsheets, which can act as the superior bifunctional catalyst outperforming Pt/C for both hydrazine oxidation reaction and hydrogen evolution reaction, where an ultralow working potential of -70 mV and an ultrasmall overpotential of 24 mV for 10 mA cm-2 can be achieved. The two-electrode electrolyzer can reach 10 mA cm-2 with a record-low cell voltage of 23 mV and an ultrahigh current density of 522 mA cm-2 at 1.0 V. The DFT calculations unravel the notability of partial exposure in the hybrid structure, as the exposed Ru atoms are the active sites for hydrazine dehydrogenation, while the C atoms exhibit a more thermoneutral value for H* adsorption.
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Affiliation(s)
- Yapeng Li
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, and Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Jihua Zhang
- Guizhou Provincial Key Laboratory of Computational Nano-Material Science, Guizhou Education University, Guiyang 550018, Guizhou, China
| | - Yi Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, and Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Qizhu Qian
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, and Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Ziyun Li
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, and Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Yin Zhu
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Genqiang Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, and Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, Anhui, China.
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14
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Xu SL, Shen SC, Zhao S, Ding YW, Chu SQ, Chen P, Lin Y, Liang HW. Synthesis of carbon-supported sub-2 nanometer bimetallic catalysts by strong metal-sulfur interaction. Chem Sci 2020; 11:7933-7939. [PMID: 34094162 PMCID: PMC8163286 DOI: 10.1039/d0sc02620d] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 07/06/2020] [Indexed: 12/13/2022] Open
Abstract
Small-sized bimetallic nanoparticles that integrate the advantages of efficient exposure of the active metal surface and optimal geometric/electronic effects are of immense interest in the field of catalysis, yet there are few universal strategies for synthesizing such unique structures. Here, we report a novel method to synthesize sub-2 nm bimetallic nanoparticles (Pt-Co, Rh-Co, and Ir-Co) on mesoporous sulfur-doped carbon (S-C) supports. The approach is based on the strong chemical interaction between metals and sulfur atoms that are doped in the carbon matrix, which suppresses the metal aggregation at high temperature and thus ensures the formation of small-sized and well alloyed bimetallic nanoparticles. We also demonstrate the enhanced catalytic performance of the small-sized bimetallic Pt-Co nanoparticle catalysts for the selective hydrogenation of nitroarenes.
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Affiliation(s)
- Shi-Long Xu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China Hefei 230026 China
| | - Shan-Cheng Shen
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China Hefei 230026 China
| | - Shuai Zhao
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China Hefei 230026 China
| | - Yan-Wei Ding
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China Hefei 230026 China
| | - Sheng-Qi Chu
- Institute of High Energy Physics, Chinese Academy of Sciences Beijing 100049 China
| | - Ping Chen
- School of Chemistry and Chemical Engineering, Anhui University Hefei Anhui 230601 China
| | - Yue Lin
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China Hefei 230026 China
| | - Hai-Wei Liang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China Hefei 230026 China
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15
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Zhang L, Wu Q, Zhang Y. Early visual motion experience shapes the gap junction connections among direction selective ganglion cells. PLoS Biol 2020; 18:e3000692. [PMID: 32210427 PMCID: PMC7135332 DOI: 10.1371/journal.pbio.3000692] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 04/06/2020] [Accepted: 03/12/2020] [Indexed: 11/30/2022] Open
Abstract
Gap junction connections between neurons play critical roles in the development of the nervous system. However, studies on the sensory experience–driven plasticity during the critical period rarely examine the involvement of gap junction connections. ON-OFF direction selective ganglion cells (ooDSGCs) in the mouse retina that prefer upward motion are connected by gap junctions throughout development. Here, we show that after exposing the mice to a visual environment dominated by upward motion from eye-opening to puberty, ooDSGCs that respond preferentially to upward motion show enhanced spike synchronization, while downward motion training has the opposite effect. The effect is long-term, persisting at least three months after the training. Correlated activity during training is tightly linked to this effect: Cells trained by stimuli that promote higher levels of activity correlation show stronger gap junction connection after the training, while stimuli that produce very low activity correlation leave the cells with much weaker gap junction connections afterwards. Direct investigation of the gap junction connections among upward motion–preferring ooDSGCs show that both the percentage of electrically coupled ooDSGCs and the strength of the coupling are affected by visual motion training. Our results demonstrate that in the retina, one of the peripheral sensory systems, gap junction connections can be shaped by experience during development. Gap junction connections between upward motion–preferring direction selective ganglion cells can be shaped by early visual experience; upward motion training leads to enhanced connectivity, while downward motion greatly suppresses the connection, suggesting a form of activity-dependent plasticity.
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Affiliation(s)
- Li Zhang
- Institute of Neuroscience, Chinese Academy of Sciences, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Qiwen Wu
- Institute of Neuroscience, Chinese Academy of Sciences, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yifeng Zhang
- Institute of Neuroscience, Chinese Academy of Sciences, Shanghai, China
- * E-mail:
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16
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Wang H, Nilsen ET, Upmanyu M. Mechanical basis for thermonastic movements of cold-hardy Rhododendron leaves. J R Soc Interface 2020; 17:20190751. [PMID: 32156184 PMCID: PMC7115238 DOI: 10.1098/rsif.2019.0751] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 02/13/2020] [Indexed: 11/12/2022] Open
Abstract
The profusion of rhododendrons in cold climates is as remarkable as the beauty of their blooms. The cold-hardiness of some of the montane species is in part due to reversible leaf movements triggered under frigid conditions wherein the leaves droop at the leaf stalks (petioles) and their margins roll up around the midrib. We probe the mechanics of these movements using leaf dissection studies that reveal that the through-thickness differential expansion necessary for leaf rolling is anisotropically distributed transverse to and along the midrib. Numerical simulations and theoretical analyses of bilayer laminae show that the longitudinal expansion amplifies the transverse rolling extent. The curvature diversion scales with the in-plane Poisson's ratio, suitably aided by the stiff midrib that serves as a symmetry breaking constraint that controls the competition between the longitudinal and transverse rolling. Comparison of leaf rolling with and without the petiole indicates that the petiole flexibility and leaf rolling are in part mechanically coupled responses, implicating the hydraulic pathways that maintain the critical level of midrib stiffness necessary to support the longitudinal expansion. The study highlights the importance of curvature diversion for efficient nastic and tropic leaf movements that enhance cold-hardiness and drought resistance, and for morphing more general hinged laminae.
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Affiliation(s)
- Hailong Wang
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui 230027, People’s Republic of China
| | - Erik T. Nilsen
- Department of Biological Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| | - Moneesh Upmanyu
- Group for Simulation and Theory of Atomic-Scale Material Phenomena (stAMP), Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115, USA
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17
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Xie M, Luo S, Li Y, Lu L, Deng C, Cheng Y, Yin F. Intra-articular tracking of adipose-derived stem cells by chitosan-conjugated iron oxide nanoparticles in a rat osteoarthritis model. RSC Adv 2019; 9:12010-12019. [PMID: 35517009 PMCID: PMC9063530 DOI: 10.1039/c8ra09570a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 03/22/2019] [Indexed: 12/05/2022] Open
Abstract
Adipose-derived stem cells (ADSCs) hold great potential in cartilage tissue engineering due to their multipotency and ease of availability. MRI is an effective and noninvasive imaging approach to track cells and observe new tissue regeneration. It is essential to find a compatible and efficient imaging reagent without affecting the stemness of ADSCs. Herein, we developed chitosan-modified iron oxide nanoparticles (IO-CS) as the T 2 contrast reagent with good cell compatibility and high cellular uptake efficiency and used IO-CS for ADSC intra-articular imaging in a rat osteoarthritis (OA) model. TEM demonstrated the great morphology and size distribution of IO-CS nanoparticles with the size of 17 nm. Magnetization (29.4 emu per g) and MRI tests confirmed (R 2 of 184 mM-1 s-1) the feasibility of IO-CS nanoparticles as an MRI contrast reagent. In addition, the IO-CS nanoparticles showed good cellular compatibility and high labeling efficiency as compared to the commercial agent ferumoxytol. Moreover, incorporation of IO-CS nanoparticles did not alter the adipogenic, osteogenic and chondrogenic differentiation ability of ADSCs. Furthermore, the MRI transverse R 2 maps showed a persistence time of the IO-CS nanoparticles in ADSCs of 6 days in vitro. Then, we investigated the imaging capability of the IO-CS nanoparticle-labeled ADSCs in vivo with MRI for 5 weeks. The histological studies demonstrated the intra-articular biodistribution of the IO-CS nanoparticles, including in the cartilage superficial layer, synovial sublining layer, periosteum and bone marrow cavity. They provided systemic distribution information of the ADSCs in the OA rat model. In summary, we developed an accessible and effective T 2 imaging reagent with good biocompatibility and maintenance of the stemness of ADSCs. This showed the potential translational application of IO-CS nanoparticles as an MRI reagent in cartilage tissue engineering.
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Affiliation(s)
- Meihua Xie
- Institute for Regenerative Medicine, The Institute for Biomedical Engineering & Nano Science, Shanghai East Hospital, Tongji University School of Medicine 1800 Yuntai Road Shanghai 200123 China
| | - ShuLin Luo
- Department of Joint Surgery, Shanghai East Hospital, School of Medicine, Tongji University Shanghai China
| | - Ying Li
- Department of Joint Surgery, Shanghai East Hospital, School of Medicine, Tongji University Shanghai China
| | - Laiya Lu
- Department of Joint Surgery, Shanghai East Hospital, School of Medicine, Tongji University Shanghai China
| | - Cuijun Deng
- Institute for Regenerative Medicine, The Institute for Biomedical Engineering & Nano Science, Shanghai East Hospital, Tongji University School of Medicine 1800 Yuntai Road Shanghai 200123 China
| | - Yu Cheng
- Institute for Regenerative Medicine, The Institute for Biomedical Engineering & Nano Science, Shanghai East Hospital, Tongji University School of Medicine 1800 Yuntai Road Shanghai 200123 China
| | - Feng Yin
- Department of Joint Surgery, Shanghai East Hospital, School of Medicine, Tongji University Shanghai China
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18
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Pei Y, Zhong H, Wang M, Zhang P, Zhao Y. Effect of Contact Pressure on the Performance of Carbon Nanotube Arrays Thermal Interface Material. Nanomaterials (Basel) 2018; 8:E732. [PMID: 30227621 PMCID: PMC6163777 DOI: 10.3390/nano8090732] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 09/12/2018] [Accepted: 09/13/2018] [Indexed: 11/16/2022]
Abstract
Vertically aligned carbon nanotube (CNT) arrays are promising candidates for advanced thermal interface materials (TIMs) since they possess high mechanical compliance and high intrinsic thermal conductivity. Some of the previous works indicate that the CNT arrays in direct dry contact with the target surface possess low contact thermal conductance, which is the dominant thermal resistance. Using a phase sensitive transient thermo-reflectance (PSTTR) technique, we measure the thermal conductance between CNT arrays and copper (Cu) surfaces under different pressures. The experiments demonstrated that the contact force is one of the crucial factors for optimizing the thermal performance of CNT array-based TIMs. The experimental results suggest that the Cu-CNT arrays' contact thermal conductance has a strong dependence on the surface deformation and has an order of magnitude rise as the contact pressure increases from 0.05 to 0.15 MPa. However, further increase of the contact pressure beyond 0.15 MPa has little effect on the contact thermal resistance. This work could provide guidelines to determine the minimum requirement of packaging pressure on CNT TIMs.
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Affiliation(s)
- Yu Pei
- Department of Precision Machinery & Precision Instrumentation, University of Science and Technology of China, Hefei 230022, China.
- CAS Key Laboratory of Mechanical Behavior and Design of Materials (LMBD), Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, China.
| | - Hongmei Zhong
- Department of Precision Machinery & Precision Instrumentation, University of Science and Technology of China, Hefei 230022, China.
- CAS Key Laboratory of Mechanical Behavior and Design of Materials (LMBD), Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, China.
| | - Mengyu Wang
- Department of Precision Machinery & Precision Instrumentation, University of Science and Technology of China, Hefei 230022, China.
- CAS Key Laboratory of Mechanical Behavior and Design of Materials (LMBD), Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, China.
| | - Peng Zhang
- Department of Precision Machinery & Precision Instrumentation, University of Science and Technology of China, Hefei 230022, China.
- CAS Key Laboratory of Mechanical Behavior and Design of Materials (LMBD), Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, China.
| | - Yang Zhao
- Department of Precision Machinery & Precision Instrumentation, University of Science and Technology of China, Hefei 230022, China.
- CAS Key Laboratory of Mechanical Behavior and Design of Materials (LMBD), Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, China.
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