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Journal of Energy Chemistry 2023年第10期85卷 267-275,I0008页

作者： haoyuan chi Jianlong Lin Siyu Kuang Minglu Li Hai Liu Qun Fan Tianxiang Yan Sheng Zhang Xinbin Ma Key Laboratory for Green Chemical Technology of Ministry of Education Collaborative Innovation Centre of Chemical Science and EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

Electrochemical CO_(2)reduction into energy-carrying compounds,such as formate,is of great importance for carbon neutrality,which however suffers from high electrical energy input and liquid products ***,we fabricated self-supported ultrathin NiCo layered double hydroxides(LDHs)electrodes as anode for methanol electrooxidation to achieve a high formate production rate(5.89 mmol h^(-1)cm^(-2))coupled with CO_(2)electro-reduction at the cathode.A total formate faradic efficiency of both anode for methanol oxidation and cathode for CO_(2)reduction can reach up to 188%driven by a low cell potential of only 2.06 V at 100 mA cm^(-2)in membrane-electrode assembly(MEA).Physical characterizations demonstrated that Ni^(3+)species,formed on the electrochemical oxidation of Ni-containing hydroxide,acted as catalytically active species for the oxidation of methanol to ***,DFT calculations revealed that ultrathin LDHs were beneficial for the formation of Ni^(3+)in hydroxides and introducing oxygen vacancy in NiCo-LDH could decrease the energy barrier of the rate-determining step for methanol *** work presents a promising approach for fabricating advanced electrodes towards electrocatalytic reactions.

关键词： CO_(2)reduction Methanol oxidation reaction Formate Layered double hydroxides Oxygen vacancies

Tandem electrocatalysis for CO_(2) reduction to multi-carbons

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Science china Chemistry 2024年第11期67卷 3631-3651页

作者： Xindi Li Tianxiang Yan Yichen Meng Zhanpeng Liang Tianying Zhang haoyuan chi Ziting Fan Yifan Jin Haoran Zhang Sheng Zhang Key Laboratory for Green Chemical Technology of Ministry of Education Collaborative Innovation Centre of Chemical Science and EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207China

The rising CO_(2) concentration in the atmosphere due to extensive use of fossil fuels has led to serious climate and environmental issues. One efficient solution is that CO_(2) capture from industrial emissions followed its conversion into value-added chemicals driven by renewable energies. CO_(2) electroreduction(CO_(2) RR) features a green and sustainable fashion towards effective CO_(2) conversion, but still suffers from low multi-carbon selectivity and yield. Considering the pivotal role of CO intermediate in C–C coupling to multi-carbon formation, tandem CO_(2) RR systems with separated CO generation and consumption components could facilitate the coupling between *CO-based intermediates to energy-intensive multi-carbons by manipulating CO diffusion and surface coverage. In this aspect, we comprehensively reviewed the design principles of tandem systems for CO_(2) electroreduction reaction. The chemistry behind the C–C coupling regarding to their distribution and diffusion was initially introduced, which was followed by achievements on tandem architectures, from catalysts, electrodes to systems. Future directions and perspectives on advanced tandem system designs for CO_(2) RR were discussed at the end. This review contributes to the understanding of structureperformance correlations in tandem catalysis and helps guide the effective collection of multi-carbons of high-yield and highselectivity.

关键词： electrocatalytic CO_(2)reduction tandem electrocatalysis design CO mass transfer model

Intermetallic CuAu nanoalloy for stable electrochemical CO_(2) reduction

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chinese Chemical Letters 2023年第7期34卷 226-229页

作者： Siyu Kuang Minglu Li Xiaoyi Chen haoyuan chi Jianlong Lin Zheng Hu Shi Hu Sheng Zhang Xinbin Ma Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207China Tianjin Key Laboratory of Molecular Optoelectronic Science School of ScienceTianjin UniversityTianjin 300072China

Copper is one of the most efficient catalysts widely investigated in electrochemical CO_(2) reduction, however, the further development of copper-based catalysts is constrained by severe stability problems. In this work, we developed a method for the synthesis of highly ordered Cu Au intermetallic nanoalloys(o-CuAu) under mild conditions(< 250℃), which can convert carbon dioxide to carbon monoxide with high selectivity and can operate stably for 160 h without current decay. The improved stability is believed to be due to the increased mixing enthalpy and stronger atomic interactions between Cu and Au atoms in the intermetallic nanoalloy. In addition, XPS results, Tafel slope and in situ IR spectroscopy demonstrate that high valence gold atoms on o-CuAu surface promote the reduction of CO_(2). In contrast, the disordered CuAu nanoalloy(d-CuAu) underwent atomic rearrangement to form a Cu-rich structure on the surface, leading to reduced stability. These findings may provide insight into the rational design of stable CO_(2) RR electrocatalysts through proper structural engineering.

关键词： CO_(2)reduction CuAu nanoalloy Intermetallic Stability Electrocatalysts

Scaled-up synthesis of defect-rich layered double hydroxide monolayers without organic species for efficient oxygen evolution reaction

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Green Energy & Environment 2022年第5期7卷 975-982页

作者： haoyuan chi Jingwen Dong Tian Li Sha Bai Ling Tan Jikang Wang Tianyang Shen Guihao Liu Lihong Liu Luyi Sun Yufei Zhao Yu-Fei Song State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing100029China College of Chemistry Key Laboratory of Theoretical&Computational Photochemistry of Ministry of EducationBeijing Normal UniversityBeijing100875China Polymer Program Institute of Materials Science and Department of Chemical&Biomolecular EngineeringUniversity of ConnecticutStorrsConnecticut06269USA Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing100029China

The scaled-up synthesis of organic-free monolayer nanomaterials is highly desirable,especially in obtaining green energy by *** this study,a method for the scaled-up synthesis of the series of monolayer layered double hydroxides(LDHs)without the addition of organic solvents is reported via the separate nucleation and aging steps *** resulting monolayer LDHs with the thicknesses of less than 1 nm showed a narrow thickness distribution.X-ray absorption fine-structure revealed that monolayer NiFe-LDH nanosheets have a number of oxygen and metal vacancies *** a practical application,monolayer NiFe-LDH nanosheets containing defects showed an enhanced electrocatalytic water oxidation activity compared with that of bulk *** functional theory calculations uncovered that excellent catalytic activity is attributed to vacancies *** proposed method is an economical and universally applicable strategy for the scaled-up production of monolayer LDHs.

关键词： process synthesis monolayer

Uncertainty pattern in landslide susceptibility prediction modelling:Effects of different landslide boundaries and spatial shape expressions

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Geoscience Frontiers 2022年第2期13卷 62-77页

作者： Faming Huang Jun Yan Xuanmei Fan chi Yao Jinsong Huang Wei Chen haoyuan Hong School of Civil Engineering and Architecture Nanchang UniversityNanchang 330031China State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengduSichuan 610059China Discipline of Civil Surveying and Environmental EngineeringPriority Research Centre for Geotechnical Science and EngineeringUniversity of NewcastleNSWAustralia College of Geology&Environment Xi'an University of Science and TechnologyXi'an 710054China Department of Geography and Regional Research University of ViennaViennaAustria

In some studies on landslide susceptibility mapping(LSM),landslide boundary and spatial shape characteristics have been expressed in the form of points or circles in the landslide inventory instead of the accurate polygon *** expressions of landslide boundaries and spatial shapes may lead to substantial differences in the distribution of predicted landslide susceptibility indexes(LSIs);moreover,the presence of irregular landslide boundaries and spatial shapes introduces uncertainties into the *** address this issue by accurately drawing polygonal boundaries based on LSM,the uncertainty patterns of LSM modelling under two different landslide boundaries and spatial shapes,such as landslide points and circles,are *** the research area of Ruijin City in china,a total of 370 landslides with accurate boundary information are obtained,and 10 environmental factors,such as slope and lithology,are ***,correlation analyses between the landslide boundary shapes and selected environmental factors are performed via the frequency ratio(FR)***,a support vector machine(SVM)and random forest(RF)based on landslide points,circles and accurate landslide polygons are constructed as point-,circle-and polygon-based SVM and RF models,respectively,to address ***,the prediction capabilities of the above models are compared by computing their statistical accuracy using receiver operating characteristic analysis,and the uncertainties of the predicted LSIs under the above models are *** results show that using polygonal surfaces with a higher reliability and accuracy to express the landslide boundary and spatial shape can provide a markedly improved LSM accuracy,compared to those based on the points and ***,a higher degree of uncertainty of LSM modelling is present in the expression of points because there are too few grid units acting as model input ***,the expression of the landslide boundary as circl

关键词： Landslide boundary Landslide susceptibility mapping Machine learning Uncertainty analysis Frequency ratio

Microwave heating as a universal method to transform confined molecules into armchair graphene nanoribbons

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Nano Research 2023年第7期16卷 10644-10651页

作者： haoyuan Zhang Yingzhi Chen Kunpeng Tang Ziheng Lin Xuan Li Hongwei Zhang Yifan Zhang chi Ho Wong chi Wah Leung Chee Leung Mak Yuan Hu Weili Cui Kecheng Cao Lei Shi State Key Laboratory of Optoelectronic Materials and Technologies Nanotechnology Research CenterGuangdong Province Key Lab of Display Material and TechnologySchool of Materials Science and EngineeringSun Yat-sen UniversityGuangzhou 510275China Huzhou Key Laboratory of Environmental Functional Materials and Pollution Control School of EngineeringHuzhou UniversityHuzhou 313000China Department of Industrial and Systems Engineering Research Institute for Advanced ManufacturingThe Hong Kong Polytechnic UniversityHong Kong 999077China Department of Applied Physics The Hong Kong Polytechnic UniversityHong Kong 999077China Shanghai Key Laboratory of High-resolution Electron Microscopy ShanghaiTech UniversityShanghai 201210China

Armchair graphene nanoribbons(AGNRs)with sub-nanometer width are potential materials for the fabrication of novel nanodevices thanks to their moderate direct band *** are usually synthesized by polymerizing precursor molecules on substrate ***,it is time-consuming and not suitable for large-scale *** can also be grown by transforming precursor molecules inside single-walled carbon nanotubes(SWCNTs)via furnace annealing,but the obtained AGNRs are normally *** this work,microwave heating is applied for transforming precursor molecules into *** fast heating process allows synthesizing the AGNRs in *** different molecules were successfully transformed into AGNRs,suggesting that it is a universal *** importantly,as demonstrated by Raman spectroscopy,aberrationcorrected high-resolution transmission electron microscopy and theoretical calculations,less twisted AGNRs are synthesized by the microwave heating than the furnace *** results reveal a route for rapid production of AGNRs in large scale,which would benefit future applications in novel AGNRs-based semiconductor devices.

关键词： armchair graphene nanoribbons(AGNRs) microwave heating single-walled carbon nanotubes(SWCNTs) Raman spectroscopy

不同入路全髋关节置换后髋关节功能的网状Meta分析

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中国组织工程研究 2019年第8期23卷 1248-1257页

作者：张驰吕浩源章晓云林宗汉陈跃平董盼锋冯洋广西中医药大学研究生学院广西壮族自治区南宁市530001 湖北中医药大学第一临床学院湖北省武汉市430061 广西中医药大学附属瑞康医院骨科广西壮族自治区南宁市530011

背景:临床上全髋关节置换术有7种常见的手术入路,分别为传统后侧入路、改良Hardinge入路、小切口后侧入路;直接前侧入路、慕尼黑骨科医院入路、SuperPATH入路及双切口入路。目前对于全髋关节置换最佳手术入路没有达成共识,暂未查阅到涵... 详细信息

背景:临床上全髋关节置换术有7种常见的手术入路,分别为传统后侧入路、改良Hardinge入路、小切口后侧入路;直接前侧入路、慕尼黑骨科医院入路、SuperPATH入路及双切口入路。目前对于全髋关节置换最佳手术入路没有达成共识,暂未查阅到涵盖上述7种手术入路的系统评价。目的:对比不同手术入路全髋关节置换后的近期、远期髋关节功能差异。方法:计算机检索PubMed、Embase、TheCochraneLibrary、中国生物医学文献数据库、中国知网、万方和维普数据库,根据纳入与排除标准进行文献筛选、质量评价和数据提取后应用Stata软件、R软件对各项结局指标进行网状Meta分析。结果与结论:(1)共纳入25个随机对照试验,合计2253髋,涉及7种干预措施;(2)网状Meta分析结果显示,传统后侧入路的近期髋关节Harris评分低于改良Hardinge入路、直接前侧入路、慕尼黑骨科医院入路;慕尼黑骨科医院入路的近期髋关节Harris评分高于SuperPATH入路;小切口后侧入路的远期髋关节Harris评分高于其他6种手术入路;(3)结果提示全髋关节置换后近期髋关节Harris评分最高的手术入路可能是慕尼黑骨科医院入路,远期髋关节Harris评分最高的手术入路是小切口后侧入路,双切口入路在术后近期、远期髋关节Harris评分方面均可能作为第二优选;(4)上述结论仍需要大量设计合理、涵盖多种手术入路的随机对照试验予以证实。

关键词：关节成形术,置换,髋随机对照试验 Meta分析组织工程全髋关节置换直接前侧入路后侧入路改良Hardinge入路双切口入路 SuperPATH入路髋关节Harris评分网状Meta分析国家自然科学基金

跨节段分流术治疗外伤和感染导致的脊髓空洞症

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中国临床研究 2024年第5期37卷 703-708页

作者：徐驰杨记超姬杉峰谷浩源李俞龙娄永利新乡医学院河南新乡453003 郑州大学附属郑州中心医院神经脊柱外科河南郑州450000

目的本研究结合脑脊液动力学,探讨脊髓空洞跨节段分流术治疗由于外伤和感染导致的脊髓空洞症的临床疗效。方法收集2019年7月至2021年6月就诊于郑州市中心医院脊髓空洞专科的脊髓空洞症患者共17例的临床资料,入组者均行脊髓空洞跨节段分... 详细信息

目的本研究结合脑脊液动力学,探讨脊髓空洞跨节段分流术治疗由于外伤和感染导致的脊髓空洞症的临床疗效。方法收集2019年7月至2021年6月就诊于郑州市中心医院脊髓空洞专科的脊髓空洞症患者共17例的临床资料,入组者均行脊髓空洞跨节段分流手术。分析患者手术前后的临床特征、肌电图、影像学特征。使用芝加哥chiari畸形预后评分(CCOS)、日本骨科协会(JOA)评分改善指数评估患者临床预后。采用Pearson法分析JOA评分改善指数及CCOS评分与脑脊液峰值流速差值的相关性。结果跨节段分流术后,14例临床症状明显改善,3例术后症状未改善。术后JOA评分高于术前(17.65±1.80 vs 8.94±2.36,t=11.609,P<0.01)。手术后肢体麻木、分离性感觉障碍、步态障碍、头晕症状、下肢无力、共济失调、感觉神经传导、运动神经传导、空洞最大径及枕骨大孔区及中脑导水管收缩期、舒张期脑脊液峰值流速较术前改善(P<0.05)。JOA评分改善指数及CCOS评分与脑脊液峰值流速差值显著相关(P<0.05)。结论对于外伤和感染导致的脊髓空洞症患者,脊髓空洞跨节段分流术一定程度上改善患者的脑脊液动力学,促进脊髓空洞缩小,改善临床症状。

关键词：跨节段分流术脊髓空洞症蛛网膜炎脊髓外伤脑脊液流体动力学

四脑室-蛛网膜下腔分流术治疗复发性、特发性脊髓空洞症疗效观察

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新乡医学院学报 2023年第8期40卷 744-748页

作者：徐光华杨记超姬杉峰谷浩源徐驰娄永利新乡医学院河南新乡453003 郑州大学附属郑州中心医院神经脊柱外科河南郑州450000

目的探讨四脑室-蛛网膜下腔分流术(FVSS)治疗复发性、特发性脊髓空洞症(SM)的临床疗效。方法选择2019年1月至2021年6月郑州大学附属郑州中心医院收治的16例复发性、特发性SM患者为研究对象。所有患者均行FVSS,通过查阅病历资料收集患者... 详细信息

目的探讨四脑室-蛛网膜下腔分流术(FVSS)治疗复发性、特发性脊髓空洞症(SM)的临床疗效。方法选择2019年1月至2021年6月郑州大学附属郑州中心医院收治的16例复发性、特发性SM患者为研究对象。所有患者均行FVSS,通过查阅病历资料收集患者手术前后的症状资料。分别于术前1周及术后6个月应用改良日本骨科学会(mJOA)评分评估患者的神经功能。分别于术前1周及术后6个月,采用全脊髓磁共振成像检查患者脊髓空洞直径,相位对比磁共振成像(PC-MRI)测量中脑导水管中段、枕骨大孔收缩期及舒张期脑脊液流速,PC-MRI测量收缩期脑干背侧脑脊液循环情况,Queckensted试验检测患者40、60 mm Hg压力下的脑脊液峰值压力以及达峰时间;于术后6个月,采用芝加哥chiari畸形预后量表(CCOS)评估患者预后情况。结果术前SM患者出现疼痛14例、节段性感觉分离10例、肢体麻木9例、上肢肌力下降9例、下肢肌力下降5例。术后13例患者疼痛明显改善,1例疼痛无明显改善。手术前后SM患者mJOA评分分别为5~11(9.86±2.20)、10~15(12.67±3.95)分,SM患者术后mJOA评分显著高于术前(P0.05)。SM患者预后良好14例,预后不良2例,患者均未出现神经损伤、脑脊液漏、感染等并发症。术后6个月复查PC-MRI及Queckensted试验显示,SM患者四脑室-蛛网膜下腔置入分流管固定良好,未发现分流管脱落及堵塞情况。结论FVSS可有效改善复发性、特发性SM患者的临床症状,改善神经功能和脑脊液循环情况,且预后良好。

关键词：脊髓空洞症脑脊液流体动力学 chiariⅠ畸形四脑室-蛛网膜下腔分流术

移动式增容配电变压器并联经济运行及投切策略分析

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哈尔滨理工大学学报 2023年第1期28卷 80-87页

作者：王金龙田皓元周骏崔林焦万章陈连飞池明赫云南电力试验研究院(集团)有限公司昆明650214 哈尔滨理工大学电气工程国家级实验教学示范中心哈尔滨150080

针对旅游区及农村地区季节性用电负荷波动大对配变运行安全及经济性造成了巨大影响的问题,提出增容变压器并联运行及投切策略方案。为提高增容变压器利用率以及并联变压器组运行效率,结合丽江地区现有变压器状况,对移动式增容变压器的... 详细信息

针对旅游区及农村地区季节性用电负荷波动大对配变运行安全及经济性造成了巨大影响的问题,提出增容变压器并联运行及投切策略方案。为提高增容变压器利用率以及并联变压器组运行效率,结合丽江地区现有变压器状况,对移动式增容变压器的阻抗范围进行了优化计算。随后,考虑运行区间长度、节电量等影响因素,依据模糊决策理论,建立模糊策略模型,并与时段控制相结合,从而优化投切策略。结果表明,增容变压器阻抗区间的合理选取,能够增加变压器组运行效率。变压器的投切策略提升了并联系统的节电效果,规避了日负荷曲线的波动误差,可提高供电经济性和可靠性。

关键词：并联运行投切策略模糊策略时段控制

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