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Nano-Au-decorated hierarchical porous cobalt sulfide derived from ZIF-67 toward optimized oxygen evolution catalysis:Important roles of microstructures and electronic modulation

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Carbon Energy 2024年第5期6卷 1-14页

作者： Hongyu Gong guanliang sun Wenhua Shi Dongwei Li Xiangjun Zheng Huan Shi Xiu Liang Ruizhi Yang Changzhou Yuan Department of New Energy Materials School of Environmental and Chemical EngineeringJiangsu University of Science and TechnologyZhenjiangJiangsuChina Advanced Materials Institute Qilu University of Technology(Shandong Academy of Sciences)JinanShandongChina Shandong Saikesaisi Hydrogen Energy Co. Ltd.JinanShandongChina Department of Materials Science and Engineering School of Materials Science&EngineeringUniversity of JinanJinanShandongChina Department of New Energy Science and Engineering College of EnergySoochow Institute for Energy and Materials InnovationsSoochow UniversitySuzhouJiangsuChina

Enhancing both the number of active sites available and the intrinsic activity of Co-based electrocatalysts simultaneously is a desirable goal.Herein,a ZIF-67-derived hierarchical porous cobalt sulfide decorated by Au nanoparticles(NPs)(denoted as HP-Au@CoxSy@ZIF-67)hybrid is synthesized by low-temperature sulfuration treatment.The well-defined macroporous-mesoporous-microporous structure is obtained based on the combination of polystyrene spheres,as-formed CoxSy nanosheets,and ZIF-67 frameworks.This novel three-dimensional hierarchical structure significantly enlarges the three-phase interfaces,accelerating the mass transfer and exposing the active centers for oxygen evolution reaction.The electronic structure of Co is modulated by Au through charge transfer,and a series of experiments,together with theoretical analysis,is performed to ascertain the electronic modulation of Co by Au.Meanwhile,HP-Au@CoxSy@ZIF-67 catalysts with different amounts of Au were synthesized,wherein Au and NaBH4 reductant result in an interesting“competition effect”to regulate the relative ratio of Co^(2+)/Co^(3+),and moderate Au assists the electrochemical performance to reach the highest value.Consequently,the optimized HP-Au@CoxSy@ZIF-67 exhibits a low overpotential of 340 mV at 10 mA cm^(-2)and a Tafel slope of 42 mV dec-1 for OER in 0.1 M aqueous KOH,enabling efficient water splitting and Zn-air battery performance.The work here highlights the pivotal roles of both microstructural and electronic modulation in enhancing electrocatalytic activity and presents a feasible strategy for designing and optimizing advanced electrocatalysts.

关键词： Au nanoparticles cobalt sulfide electronic modulation hierarchical porous structure oxygen evolution reaction

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基于合肥光源数据库的束流寿命分析与诊断

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核电子学与探测技术 2024年第1期44卷 131-138页

作者：杨锐余海山孙晓康汪冠良宣科刘功发中国科学技术大学国家同步辐射实验室合肥230029

高质量的电子束流寿命数据可以直接反映装置的健康状态,为了获得高质量的束流寿命数据,提出一种束流寿命数据清洗方法,并开展了影响束流寿命的关键因素研究。基于合肥光源历史数据库对2022年以来累积的束流寿命原始数据进行分析,采用Pyt... 详细信息

高质量的电子束流寿命数据可以直接反映装置的健康状态,为了获得高质量的束流寿命数据,提出一种束流寿命数据清洗方法,并开展了影响束流寿命的关键因素研究。基于合肥光源历史数据库对2022年以来累积的束流寿命原始数据进行分析,采用Python开发了自动化数据清洗程序,用于获取和处理合肥光源的原始束流寿命数据,以获得长时间跨度的束流寿命变化趋势。通过使用Pearson相关系数对束流寿命异常原因进行分析,发现合肥光源束流寿命受储存环真空压强和高频腔压的影响较大。该束流寿命清洗程序处理快捷,获取的高质量束流寿命数据可以为合肥光源的健康状态检测诊断和预警提供重要依据。

关键词：合肥光源束流寿命数据处理 Pearson相关系数

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Phylogeny and sex chromosome evolution of Palaeognathae

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Journal of Genetics and Genomics 2022年第2期49卷 109-119页

作者： Zongji Wang Jilin Zhang Xiaoman Xu Christopher Witt Yuan Deng Guangji Chen guanliang Meng Shaohong Feng Luohao Xu Tamas Szekely Guojie Zhang Qi Zhou MOE Laboratory of Biosystems Homeostasis and Protection and Zhejiang Provincial Key Laboratory for Cancer Molecular Cell Biology Life Sciences InstituteZhejiang UniversityHangzhouZhejiang 310058China Department of Neuroscience and Developmental Biology University of ViennaVienna 1090Austria Institute of Animal Sex and Development Zhejiang Wanli UniversityNingboZhejiang 315100China BGI-Shenzhen Beishan Industrial ZoneShenzhen 518083China Department of Medical Biochemistry and Biophysics Karolinska InstitutetSE-17177 StockholmSweden Department of Biology and the Museum of Southwestern Biology University of New MexicoAlbuquerqueNM 87131USA State Key Laboratory of Biocontrol Department of EcologySchool of Life SciencesSun Yat-sen UniversityGuangzhouGuangdong 510275China Milner Center for Evolution Department of Biology and BiochemistryUniversity of BathBath BA17AYUK State Key Laboratory of Genetic Resources and Evolution Kunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650223China Section for Ecology and Evolution Department of BiologyUniversity of CopenhagenDK-2100 CopenhagenDenmark Center for Excellence in Animal Evolution and Genetics Chinese Academy of SciencesKunmingYunnan 650223China Center for Reproductive Medicine The 2nd Afﬁliated HospitalSchool of MedicineZhejiang UniversityHangzhouZhejiang 310052China

Many paleognaths(ratites and tinamous) have a pair of homomorphic ZW sex chromosomes in contrast to the highly differentiated sex chromosomes of most other birds. To understand the evolutionary causes for the different tempos of sex chromosome evolution, we produced female genomes of 12 paleognathous species and reconstructed the phylogeny and the evolutionary history of paleognathous sex chromosomes.We uncovered that Palaeognathae sex chromosomes had undergone stepwise recombination suppression and formed a pattern of “evolutionary strata”. Nine of the 15 studied species’ sex chromosomes have maintained homologous recombination in their long pseudoautosomal regions extending more than half of the entire chromosome length. We found that in the older strata, the W chromosome suffered more serious functional gene loss. Their homologous Z-linked regions, compared with other genomic regions, have produced an excess of species-specific autosomal duplicated genes that evolved female-specific expression, in contrast to their broadly expressed progenitors. We speculate such “defeminization” of Z chromosome with underrepresentation of female-biased genes and slow divergence of sex chromosomes of paleognaths might be related to their distinctive mode of sexual selection targeting females rather than males, which evolved in their common ancestors.

关键词： Paleognaths Sex chromosome evolution Comparative genomics Sexual selection

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The chromosome-scale genome of Phoebe bournei reveals contrasting fates of terpene synthase (TPS)-a and TPS-b subfamilies

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Plant Communications 2022年第6期3卷 26-42页

作者： Xiao Han Junhong Zhang Shuang Han sun Li Chong guanliang Meng Minyan Song Yang Wang Shengcai Zhou Chengcheng Liu Luhuan Lou Xiongzhen Lou Longjun Cheng Erpei Lin Huahong Huang Qi Yang Zaikang Tong State Key Laboratory of Subtropical Silviculture College of Forestry and BiotechnologyZhejiang A&F UniversityHangzhouZhejiang 311300China Nextomics Biosciences WuhanHubei 430000China Experimental Forest Farm of Qingyuan County QingyuanZhejiang 323800China

Terpenoids,including aromatic volatile monoterpenoids and sesquiterpenoids,function in defense against pathogens and herbivores.Phoebe trees are remarkable for their scented wood and decay resistance.Unlike other Lauraceae species investigated to date,Phoebe species predominantly accumulate sesquiterpenoids instead of monoterpenoids.Limited genomic data restrict the elucidation of terpenoid variation and functions.Here,we present a chromosome-scale genome assembly of a Lauraceae tree,Phoebe bournei,and identify 72 full-length terpene synthase(TPS)genes.Genome-level comparison shows pervasive lineage-specific duplication and contraction of TPS subfamilies,which have contributed to the extreme terpenoid variation within Lauraceae species.Although the TPS-a and TPS-b subfamilies were both expanded via tandem duplication in P.bournei,more TPS-a copies were retained and constitutively expressed,whereas more TPS-b copies were lost.The TPS-a genes on chromosome 8 functionally diverged to synthesize eight highly accumulated sesquiterpenes in P.bournei.The essential oil of P.bournei and its main component,b-caryophyllene,exhibited antifungal activities against the three most widespread canker pathogens of trees.The TPS-a and TPS-b subfamilies have experienced contrasting fates over the evolution of P.bournei.The abundant sesquiterpenoids produced by TPS-a proteins contribute to the excellent pathogen resistance of P.bournei trees.Overall,this study sheds light on the evolution and adaptation of terpenoids in Lauraceae and provides valuable resources for boosting plant immunity against pathogens in various trees and crops.

关键词： Phoebe bournei genome sequence terpene synthases sesquiterpenoids positive selection pathogen resistance

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环氧体系钢桥面铺装坑槽病害修补技术使用效果研究

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公路交通技术 2023年第1期39卷 112-117页

作者：吴关良尚飞彭祝涛孙洋大榭大桥有限公司浙江宁波315812 重庆市智翔铺道技术工程有限公司重庆400067

针对环氧体系钢桥面铺装坑槽病害修补技术,依托某环氧体系钢桥分别选用了重熔浇注式沥青、冷拌环氧浇注式沥青和热拌环氧+高弹改性沥青SMA技术进行实桥修补应用,并对比分析了其使用效果。结果表明,3种材料均具备良好的材料特性和路用性... 详细信息

针对环氧体系钢桥面铺装坑槽病害修补技术,依托某环氧体系钢桥分别选用了重熔浇注式沥青、冷拌环氧浇注式沥青和热拌环氧+高弹改性沥青SMA技术进行实桥修补应用,并对比分析了其使用效果。结果表明,3种材料均具备良好的材料特性和路用性能,满足钢桥面铺装规范的指标要求,其中重熔浇注式沥青混合料与原环氧铺装的材料模量差异较大,尽管自身具有优异的防水性能,但施工接缝处易形成次生病害;冷拌浇注式混合料维修工艺简单,使用效果良好,适宜于小面积坑槽(≤1 m^(2))便捷维修;热拌EA+SMA技术整体使用状态良好,但工艺设备要求较高,现场实施难度较大,仅适宜大面积的坑槽维修作业。

关键词：环氧体系钢桥面铺装坑槽修补冷拌环氧浇注式使用效果

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氮掺杂科琴黑碳材料的制备及电催化氧还原性能研究

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无机盐工业 2019年第10期51卷 84-88页

作者：刘冠良刘鹏余林孙明程高广东工业大学轻工化工学院

氮掺杂碳材料是一种有应用前景的电催化氧还原催化剂。以尿素和三聚氰胺作为氮源,在氮气气氛下高温焙烧,制得两种氮掺杂科琴黑碳材料并将其用于电催化氧还原反应。使用X射线衍射仪(XRD)、X射线光电子能谱仪(XPS)、场发射扫描电子显微镜(... 详细信息

氮掺杂碳材料是一种有应用前景的电催化氧还原催化剂。以尿素和三聚氰胺作为氮源,在氮气气氛下高温焙烧,制得两种氮掺杂科琴黑碳材料并将其用于电催化氧还原反应。使用X射线衍射仪(XRD)、X射线光电子能谱仪(XPS)、场发射扫描电子显微镜(FESEM)、比表面物理吸附分析仪等对氮掺杂前后的科琴黑的结构和形貌进行了分析。结果表明:氮掺杂之后科琴黑仍保持石墨结构,其形貌和比表面积均无明显改变。在XPS谱图上,氮掺杂后科琴黑上存在氮元素,其中以三聚氰胺为氮源比以尿素为氮源更容易得到吡啶氮。通过循环伏安法和线性扫描伏安法研究了3个样品的电催化氧还原性能。结果表明:氮掺杂能明显提高科琴黑的电催化氧还原性能,未掺杂的科琴黑(AC)的半波电位为0.746 V,而以尿素和三聚氰胺为氮源掺杂后的科琴黑碳材料的半波电位分别提高到了0.756 V(尿素-N/AC)和0.786 V(三聚氰胺-N/AC)。

关键词：科琴黑氮掺杂碳材料吡啶氮氧还原

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化工模拟软件的应用与开发

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计算机与应用化学 2007年第9期24卷 1285-1288页

作者：孙红先赵听友蔡冠梁南阳师范学院化学系河南南阳473061 北京防化指挥工程学院北京102205

化工过程模拟与实验研究的结合是最有效和最廉价的化工过程研究方法。可以大大节约实验成本,加快新产品和新工艺的开发过程。文中综述了化工模拟软件的发展过程,应用领域与开发。对当前流行的国际国内商业化化工过程模拟软件AspenPlus、... 详细信息

化工过程模拟与实验研究的结合是最有效和最廉价的化工过程研究方法。可以大大节约实验成本,加快新产品和新工艺的开发过程。文中综述了化工模拟软件的发展过程,应用领域与开发。对当前流行的国际国内商业化化工过程模拟软件AspenPlus、ChemCAD、PRO/Ⅱ、HYSYS、DesignⅡ、ESCC等进行了全面的介绍。综述了化工模拟软件的研究开发现状及以后的发展方向。根据化工模拟软件的现状对化工模拟软件的发展趋势进行展望。

关键词：化工模拟软件过程模拟软件应用软件开发

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2008年于田Ms7.3地震前重力场动态变化特征分析

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大地测量与地球动力学 2010年第4期30卷 1-7页

作者：申重阳李辉孙少安杨光亮玄松柏谈洪波刘少明中国地震局地震研究所武汉430071 地壳运动与地球观测实验室武汉430071

基于1998年以来的中国大陆流动重力网观测数据,分析2008年3月新疆于田7.3级地震前区域重力场动态变化的演化特征。结果表明:区域重力场动态演化图像反映了该地震孕育的中长期(2～10年)基本信息;该地震孕育时的显著重力标志为持续多年的... 详细信息

基于1998年以来的中国大陆流动重力网观测数据,分析2008年3月新疆于田7.3级地震前区域重力场动态变化的演化特征。结果表明:区域重力场动态演化图像反映了该地震孕育的中长期(2～10年)基本信息;该地震孕育时的显著重力标志为持续多年的正重力变化(上升)和较大规模的重力变化梯级带,前者有利于地震能量的不断积累,后者有利于地震破裂的发生;该地震孕育过程中相关重力场变化呈增大-加速增大-减速增大的过程,与1976年唐山7.8级地震具类似特征;与该地震有关的多年(8年)最大累积重力变化达200×10-8ms-2。

关键词：于田地震重力观测重力场动态变化孕震

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