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Fast formation of single-unit-cell-thick and defect-rich layered double hydroxide nanosheets with highly enhanced oxygen evolution reaction for water splitting

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Nano Research 2018年第4期11卷 1883-1894页

作者： rui gao Dongpeng Yan State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 China Beijing Key Laboratory of Energy Conversion and Storage Materials College of Chemistry Beijing Normal University Beijing 100875 China

The development of high-efficiency electrocatalysts for oxygen evolution reactions （OERs） plays an important role in the water-splitting process. Herein, we report a facile way to obtain two-dimensional （2D） single-unit-cell-thick layered double hydroxide （LDH） nanosheets （NSs, - 1.3 nm） within only 5 min. These nanosheets presented significantly enhanced OER performance compared to bulk LDH systems fabricated using the conventional co-precipitation method. The current strategy further allowed control over the chemical compositions and electrochemical activities of the LDH NSs. For example, CoFe-LDH NSs presented the lowest overpotential of 0.28 V at 10 mA/cm2, and the NiFe-LDHs NSs showed Tafel slopes of 33.4 mV/decade and nearly 100% faradaic efficiency, thus outperforming state-of-the-art IrO2 water electrolysis catalysts. Moreover, positron annihilation lifetime spectroscopy and high-resolution transmission electron microscopy observations confirmed that rich defects and distorted lattices occurred within the 2D LDH NSs, which could supply abundant electrochemically active OER sites. Periodic calculations based on density functional theory （DFT） further showed that the CoFe- and NiFe-LDHs presented very low energy gaps and obvious spin-polarization behavior, which facilitated high electron mobility during the OER process. Therefore, this work presents a combined experimental and theoretical study on 2D single-unit-cell-thick LDH NSs with high OER activities, which have potential application in water splitting for renewable energy.

关键词： single-unit-cell defect-rich oxygen evolution reaction water splitting

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Progress in understanding epigenetic remodeling during induced pluripotency

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Science Bulletin 2015年第20期60卷 1713-1721页

作者： rui gao Xiaoyu Liu Shaorong gao Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital School of Life Sciences and Technology Tongji University School of Life Sciences Tsinghua University National Institute of Biological Sciences

Over 50 years of efforts, cellular reprogram- ruing opens a new door for disease modeling and regen- erative medicine. Although induction of pluripotency by transcription factors has become common, only a small portion of basic mechanisms of epigenetic modifications during this process have been revealed. To clearly under- stand reprogramming and devise ways to promote full transition towards pluripotency, we must gain insight from comprehensive characterizations of cells at distinct repro- gramming stages, which involves gene expression profil- ing, chromatin state maps of key activating and repressive marks, and DNA modifications. Here, we review recent advances in epigenetic reprogramming to pluripotency with a focus on the principal molecular regulators and attach importance to the combination of high-throughput sequencing and systematic biology approaches in uncov- ering underlying molecular mechanisms of this unique platform in future researches.

关键词： Induced pluripotency Epigeneticreprogramming Histone modifications DNA modifications

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Advances in bio-inspired electrocatalysts for clean energy future

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Nano Research 2024年第2期17卷 515-533页

作者： Jing-Wen Duan Mu Min-rui gao Division of Nanomaterials&Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleDepartment of ChemistryUniversity of Science and Technology of ChinaHefei 230026China

Electrocatalysis can enable efficient energy storage and conversion and thus is an effective way to achieve carbon *** unique structure and function of organisms can offer many ideas for the design of electrocatalysts,which has become one of the most promising research ***,the understanding of the mechanism of bio-inspired electrocatalysis has become clearer,which has promoted the design of bio-inspired catalysts and catalytic *** bio-inspired catalysts(enzyme-like catalysts,layered porous catalysts,superhydrophobic/superhydrophilic surfaces,and so on)have been developed to enable efficient electrocatalytic ***,we discuss the key advances in the field of bio-inspired electrocatalysts progressed in recent ***,the role of bio-inspiration in increasing the intrinsic activity and number of active sites of catalysts is ***,the structure and mechanism of layered porous catalytic systems that mimic biological transport systems are comprehensively ***,the design of three-phase interfaces from micro-nanoscale to atomic scale is highlighted,including the wettability of the electrode surface and the transport system near the *** conclude the review by identifying challenges in bio-inspired electrocatalysts and providing insights into future prospects for the exciting research field.

关键词： bio-inspired electrocatalysts active sites layered porous structure three-phase interface

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Stress distribution and surrounding rock control of mining near to the overlying coal pillar in the working face

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International Journal of Mining Science and Technology 2019年第6期29卷 881-887页

作者： rui gao Bin Yu Xiangbin Meng Key Laboratory of Deep Coal Resource Mining School of MinesMinistry of Education of ChinaChina University of Mining&TechnologyXuzhou 221116China Datong Coal Mine Group Co.Ltd. Datong 037000China

The occurrence of overlying coal pillar(OCP)exerts a strong effect on the stress and strain distribution of the surrounding rock in the *** this paper,the stress distribution characteristics are analyzed via the numerical calculation with the account of OCP presence or *** addition,this study revealed the joint effect of side pressure relief area of the goaf and stress concentration in OCP on the final stress ***,the rules of abutment stress distribution affected by three influencing factors,namely horizontal-vertical distances between OCP and working face and buried depth of OCP,are *** functional model linking the peak stress of surrounding rock with the above influencing factors is *** field application of the above results proved that the rib spalling and deformation of a 2.95 m-high and 5.66 m-wide roadway could be efficiently controlled by rationally adjusting working states of the support,and adopting the hydraulic prop coordinated with the p type metal beam and anchor cable to strengthen the surrounding rock of working face and roadway,*** proposed measures are considered appropriate to satisfy the safe operation requirements.

关键词： Overlying coal pillar(OCP) Stress distribution Influencing factors Surrounding rock control

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Towards designing efficient catalyst for hydrogen oxidation reaction

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Rare Metals 2020年第10期39卷 1107-1109页

作者： rui-Jie gao Ji-Jun Zou Key Laboratory for Green Chemical Technology of the Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Collaborative Innovative Center of Chemical Science and Engineering(Tianjin) Tianjin 300072China

Anion exchange membrane fuel cells(AEMFCs)have attracted increasing research efforts in the past decade due to the advantageous nature of using Pt-free catalysts and cheap components that bring its cost closer to the ... 详细信息

关键词： catalyst closer designing

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Metal phosphides and borides as the catalytic host of sulfur cathode for lithium–sulfur batteries

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International Journal of Minerals,Metallurgy and Materials 2022年第5期29卷 990-1002页

作者： rui gao Zhenyu Wang Sheng Liu Guangjie Shao Xueping gao College of Environmental and Chemical Engineering Yanshan UniversityQinhuangdao 066004China School of Materials Science and Engineering Nankai UniversityTianjin 300350China

Lithium−sulfur batteries are one of the most competitive high-energy batteries due to their high theoretical energy density of _(2)600 W·h·kg^(−1).However,their commercialization is limited by poor cycle stability mainly due to the low intrinsic electrical conductivity of sulfur and its discharged products(Li_(2)S_(2)/Li_(2)S),the sluggish reaction kinetics of sulfur cathode,and the“shuttle effect”of soluble intermediate lithi-um polysulfides in ether-based *** address these challenges,catalytic hosts have recently been introduced in sulfur cathodes to en-hance the conversion of soluble polysulfides to the final solid products and thus prevent the dissolution and loss of active-sulfur *** this review,we summarize the recent progress on the use of metal phosphides and borides of different dimensions as the catalytic host of sulfur cathodes and demonstrate the catalytic conversion mechanism of sulfur cathodes with the help of metal phosphides and borides for high-en-ergy and long-life lithium-sulfur ***,future outlooks are proposed on developing advanced catalytic host materials to improve battery performance.

关键词： lithium–sulfur batteries sulfur cathode catalytic host metal phosphides metal borides

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Decay of Correlations for Fibonacci Unimodal Interval Maps

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Acta Mathematica Sinica,English Series 2018年第1期34卷 114-138页

作者： rui gao Wei Xiao SHEN College of Mathematics Sichuan University Shanghai Center for Mathematical Sciences Fudan University

We consider a class of generalized Fibonacci unimodal maps for which the central return times {Sn} satisfy that sn= sn-1 ＋ ksh-2 for some k≥ 1. We show that such a unimodal map admits a unique absolutely continuous invariant probability with exactly stretched exponential decay of correlations if its critical order lies in （1, k ＋ 1）.

关键词： Absolutely continuous invariant probability decay of correlations unimodal maps Fi-bonacci combinatorics

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Frequency Domain Goodness of Fit Test Based Spectrum Sensing Method with Dynamically Varying Noise

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China Communications 2020年第12期17卷 172-179页

作者： rui gao Peihan Qi Zhenghua Zhang School of Information Engineering Yangzhou University88 South Daxue RoadYangzhou 225009China State Key Laboratory of Integrated Service Networks Xidian UniversityNo.2 South Taibai RoadXi'an 710071China

In cognitive radio networks,spectrum sensing under circumstances of dynamically varying noise and lacking prior information is a key challenge to the conventional spectrum sensing *** the necessary information is rather difficult to obtain practically,most existing spectrum sensing methods are fettered in *** by these,in this paper,a Frequency domain Goodness of Fit Test(FGoF)based spectrum sensing method is *** FGoF makes full use of underlying information in Guard-Bands and the advantages of GoF test works for any *** and simulated results show that the FGoF is a robust spectrum sensing method in cognitive radio with the inherent advantages of invulnerability to dynamically varying noise.

关键词： spectrum sensing goodness of fit test dynamically varying noise noise uncertainty

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The Crustal Structure and Assembly of Terranes in the Qaidam-Qilian-Beishan Area, Western China

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Acta Geologica Sinica(English Edition) 1998年第3期72卷 243-255页

作者： LIU Xun gao rui Institute of Geology Chinese Academy of Geological Sciences 26 Baiwanzhuang Rd. Beijing 100037

Abstract: Through a study of the geotransect from Golmud to Ejin Qi published recently, the tectonics of the crust beneath the area from the northern Qinghai-Tibet plateau (Qaidam and the Qilian Mountains) to the border between China and Mongolia and its structure, composition and tectonic evolution have been revealed, and abundant information about the deep structures has been provided. Based on the research into the geotransect, it is suggested that the crust in this area was formed by the assembly of the terranes in different geological stages. Following the formation of the Palaeo-Asian continent, the north part of the corridor of the transect became a part of the huge unifying continent by the end of the Early Permian. In the Mesozoic and Cenozoic, as a result of the compression mainly by the push of the Qinghai-Tibet plateau on the south, the unique crustal structure and geomorphologic features on the northern Qinghai-Tibet plateau were formed. This geotransect together with the Yadong-Golmud geotransect constitutes a long geotransect which runs across the western Chinese continent.

关键词： crustal structure terrane assembly western China

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Seismic reflection evidence of crustal duplexing and lithospheric underthrusting beneath the western Qilian Mountains,northeastern margin of the Tibetan Plateau

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Science China Earth Sciences 2021年第1期64卷 96-109页

作者： Xingfu HUANG rui gao Wenhui LI Xiaosong XIONG School of Earth Science and Engineering Sun Yat-Sen UniversityGuangzhou 510275China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519000China Key L aboratory of Deep-Earth Dynamics Institute of GeologyChinese Academy of Geological ScienceBeijing 100037China SinoProbe Center Chinese Academy of Geological ScienceBeijing 100037China

The geological processes responsible for outward growth of the Tibetan Plateau are *** Qilian Mountains on the northeastern margin of the plateau comprise one of the youngest structural components of the plateau whose understanding is key to deciphering the broader geological evolution of the ***,based on a reprocessed deep seismic profile which was originally collected during the 1990 s across the northeast margin of the western Qilian Mountains and previous geological and geophysical data,we find evidence for decoupled crustal deformation that was partitioned by a decollement,in which lowercrustal deformation featured by local duplexing preceded upper-crustal deformation featured by imbricate ***,we propose that the Asian lithospheric mantle is being underthrust beneath the western Qilian Mountains,as inferred from patterns of lower crustal deformation which is marked by the Moho *** these results yields a better understanding of lithospheric deformation of western Qilian Mountains,northeastern margin of the plateau during the Cenozoic.

关键词： Seismic reflection Crustal duplexing Lithospheric underthrusting Qilian Mountains NE Tibetan Plateau

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