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The role of CO_(2)dissociation in CO_(2)hydrogenation to ethanol on CoCu/silica catalysts

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Nano Research 2023年第5期16卷 6128-6133页

作者： Zhongyan Wang chengsheng yang Xianghong Li Xiwen Song Chunlei Pei Zhi-Jian Zhao Jinlong Gong Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyCollaborative Innovation Center of Chemical Science and EngineeringTianjin UniversityTianjin 300072China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

CoCu-based catalysts are widely used in CO_(x) hydrogenation reactions to produce higher alcohols due to the C–C coupling ability of Co and the ability of Cu to produce *** work describes the role of easily happened CO_(2)dissociation on the CoCu surface during the reaction,using different silica support to tune the metal–support interaction,reaches different selectivity to *** supported on mesoporous silica MCM-41 shows ethanol selectivity as high as 85.3%,the ethanol space-time yield(STY)is 0.229 mmol/(gmetal∙h),however,poor selectivity to ethanol as low as 28.8%is observed on CoCu supported on amorphous *** different selectivity is due to the different intensities of CO_(2)dissociation on the *** adsorbed O*produced via CO_(2)dissociation can occupy the cobalt hollow sites on CoCu surfaces,which are also the adsorption sites of C1 intermediates for further C–C coupling.

关键词： CO_(2)hydrogenation bimetallic catalysts cobalt catalysts CO_(2)dissociation ethanol synthesis

Monitoring mine collapse by D-InSAR

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Mining Science and Technology 2010年第5期20卷 696-700页

作者： yang chengsheng ZHANG Qin ZHAO Chaoying JI Lingyun ZHU Wu School of Geological Engineering and Surveying Chang'an University Xi'an 710054 China Key Laboratory of Western China Mineral Resources and Geological Engineering Ministry of Education Xi'an 710054 China Second Crust Monitoring and Application Center CEA Xi 'an 710054 China

For harmful ground collapse and its special deformation characteristics,which causes SAR images to lose coherence,InSAR technology cannot be applied in monitoring surface collapse in mining *** took the Shenmu mining area in northern Shaanxi province as an example to study subsidence in mining areas and proposed an interpolated multi-view processing *** results show that this method can improve the detectable deformation gradient to a certain extent and can become a good reference value for monitoring large scale gradient *** also analyzed the rules for temporal decorrelation in mining.

关键词： D-InSAR coal mine subsidence monitoring collapse temporal decorrelation interpolated multi-view

Active sites in CO2 hydrogenation over confined VOx-Rh catalysts

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Science China Chemistry 2019年第12期62卷 1710-1719页

作者： Guishuo Wang Ran Luo chengsheng yang Jimin Song Chuanye Xiong Hao Tian Zhi-Jian Zhao Rentao Mu Jinlong Gong Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and Technology Tianjin UniversityCollaborative Innovation Center of Chemical Science and Engineering

Metal oxide-promoted Rh-based catalysts have been widely used for CO2hydrogenation,especially for the ethanol ***,this reaction usually suffers low CO2conversion and alcohols selectivity due to the formation of byproducts methane and *** paper describes an efficient vanadium oxide promoted Rh-based catalysts confined in mesopore *** Rh-0.3VOx/MCM-41 catalyst shows superior conversion（～12%）and ethanol selectivity（～24%）for *** promoting effect can be attributed to the synergism of high Rh dispersion by the confinement effect of MCM-41 and the formation of VOx-Rh interface *** and theoretical results indicate the formation of til-CO at VOx-Rh interface sites is easily dissociated into*CHx,and then*CHxcan be inserted by CO to form CH3CO*,followed by CH3CO*hydrogenation to ethanol.

关键词： interfacial active sites CO2 hydrogenation ethanol Rh-based catalysts confined catalysts

Confined Mn^(2+) enables effective aerobic oxidation catalysis

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Science China Chemistry 2024年第5期67卷 1545-1553页

作者： Desheng Yuan Sicong Ma Xiao Kong Chi Zhang Lin Chen chengsheng yang Lihua Wang Zhen Liu Lin Ye Yongmei Liu Rui Ma Zhi-Pan Liu Yifeng Zhu Yong Cao Xinhe Bao Department of Chemical Physics University of Science and Technology of ChinaHefei 230026China Department of Chemistry Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsCollaborative Innovation Center of Chemistry for Energy MaterialsFudan UniversityShanghai 200438China Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China School of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Institute of Advanced Fluorine-Containing Materials Zhejiang Normal UniversityJinhua 321004China State Key Laboratory of Catalysis National Laboratory for Clean EnergyCollaborative Innovation Center of Chemistry for Energy MaterialsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Effective and mild activation of O_(2) is essential but challenging for aerobic oxidation. In heterogeneous catalysis, high-valence manganese oxide(e.g., +4) is known to be active for the oxidation, whereas divalent MnO is ineffective due to its limited capacity to supply surface oxygen and its thermodynamically unstable structure when binding O_(2) in reaction conditions. Inspired by natural enzymes that rely on divalent Mn^(2+), we discovered that confining Mn^(2+) onto the Mn_(2)O_(3) surface through a dedicated calcination process creates highly active catalysts for the aerobic oxidation of 5-hydroxymethylfurfural, benzyl alcohol, and *** Mn_(2)O_(3)-confined Mn^(2+) is undercoordinated and efficiently mediates O_(2) activation, resulting in 2–3 orders of magnitude higher activity than Mn_(2)O_(3) alone. Through low-temperature infrared spectroscopy, we distinguished low-content Mn^(2+) sites at Mn_(2)O_(3) surface, which are difficult to be differentiated by X-ray photoelectron spectroscopy. The combination of in-situ energydispersive X-ray absorption spectroscopy and X-ray diffraction further provides insights into the formation of the newly identified active Mn^(2+) sites. By optimizing the calcination step, we were able to increase the catalytic activity threefold *** finding offers promising frontiers for exploring active oxidation catalysts by utilizing the confinement of Mn^(2+)and oftenignored calcination skills.

关键词： confinement catalysis manganese oxide aerobic oxidation divalent Mn^(2+) operando spectroscopies

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基于商用密码的新能源集控系统内生安全研究

电力自动化设备 2023年第7期43卷 210-216页

作者：杨乘胜张帆宋坤国电南京自动化股份有限公司信息技术事业部江苏南京211100 南京工业大学计算机与信息工程学院(人工智能学院) 江苏南京211816

新能源集控系统跨地域部署,点多面广,面临来自网络空间的不确定性动态攻击风险。利用模糊层次分析法分析新能源集控系统的安全风险。针对非法遥控、非法访问等高危安全风险,从内生安全角度研究系统安全防护方法,提出国产密码技术与DL/T ... 详细信息

新能源集控系统跨地域部署,点多面广,面临来自网络空间的不确定性动态攻击风险。利用模糊层次分析法分析新能源集控系统的安全风险。针对非法遥控、非法访问等高危安全风险,从内生安全角度研究系统安全防护方法,提出国产密码技术与DL/T 476—2012规约深度融合方法,用于远程数据通信,并对数据验签、解密失败行为进行安全审计,根据审计结果屏蔽恶意攻击。在数据加密过程中,提出基于Linux随机数生成器(LRNG)的“一次一密”SM4秘钥生成方案,降低了秘钥泄漏风险。编写的程序搭建实验环境对所提方法进行验证,验证结果表明所提方法是可行有效的。

关键词：新能源集控系统商用密码国密算法内生安全模糊层次分析法

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抗抖技术在断路器机械特性监测中的应用

电力自动化设备 2012年第12期32卷 113-117页

作者：杨乘胜郭乐张旭国电南京自动化股份有限公司江苏南京211100

利用光耦对旋转编码器输出的2路正交编码脉冲A、B进行光电隔离,然后将脉冲信号送入施密特触发器74HC14进行脉冲整形。通过边沿检测D触发器、二-四译码器和逻辑门电路构成数字逻辑电路,判断机构的正反转。当旋转编码器正向旋转时,信号A、... 详细信息

利用光耦对旋转编码器输出的2路正交编码脉冲A、B进行光电隔离,然后将脉冲信号送入施密特触发器74HC14进行脉冲整形。通过边沿检测D触发器、二-四译码器和逻辑门电路构成数字逻辑电路,判断机构的正反转。当旋转编码器正向旋转时,信号A、B分别转换为方波信号和恒为低电平的信号,正旋计数输出端输出高电平;反向旋转时,信号A、B分别转换为恒为低电平的信号和方波信号,反旋计数输出端输出高电平。在波形出现抖动时不进行计数,实现抗抖动。

关键词：开关断路器传感器逻辑电路监测抗抖动

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秋冬季节青虾暂养方法

科学养鱼 2010年第10期32卷 26-27页

作者：杨成胜山东微山县傅村镇渔技站 277605

秋冬季节利用一些没有鱼类越冬的空闲池塘,进行初步改造后开展青虾暂养,可以充分利用资源优势,增加收入,还可以在冬季没有新鲜活虾的季节均衡青虾上市,获得好的销售价格,提高青虾的养殖效益。秋冬季节在空闲池塘进行青虾暂养,可以错开... 详细信息

秋冬季节利用一些没有鱼类越冬的空闲池塘,进行初步改造后开展青虾暂养,可以充分利用资源优势,增加收入,还可以在冬季没有新鲜活虾的季节均衡青虾上市,获得好的销售价格,提高青虾的养殖效益。秋冬季节在空闲池塘进行青虾暂养,可以错开青虾销售旺季,在春节前后待价而沽,随捕随售,并为来年青虾繁殖预留优质种虾,是提高池塘利用效率、增加养殖户收入的好方法。

关键词：秋冬季节暂养方法青虾利用效率销售价格鱼类越冬资源优势养殖效益

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ECMWF资料的边界层伸缩水汽加密算法

武汉大学学报（信息科学版） 2015年第1期40卷 83-89页

作者：杨成生张勤李振洪长安大学地质工程与测绘学院陕西西安710054 纽卡斯尔大学土木工程与地球科学学院

针对欧洲中期数值天气预报中心(ECMWF)数据在研究小区域气象时空间分辨率较低的问题,研究了基于边界层伸缩的空间水汽加密思想,建立了基于ECMWF的空间水汽、地表气压和地表温度的加密模型。该模型可依据加密区域DEM分辨率实现任意密度... 详细信息

针对欧洲中期数值天气预报中心(ECMWF)数据在研究小区域气象时空间分辨率较低的问题,研究了基于边界层伸缩的空间水汽加密思想,建立了基于ECMWF的空间水汽、地表气压和地表温度的加密模型。该模型可依据加密区域DEM分辨率实现任意密度的加密结果。利用美国GPS-IPW示范网络中夏季连续两个月的GPS水汽观测值和地表实测气象数据进行了实验,结果表明,该模型结果较ECMWF原始数据,在空间水汽、地表气压和地表温度的精度上均有较大提高。

关键词： ECMWF 大气可降水边界层伸缩数值气象模式空间加密

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中国高尔夫草坪研究的文献计量分析

草业科学 2023年第12期40卷 3222-3232页

作者：余靖萱任占兵阳承胜深圳大学体育学院广东深圳518060

本研究旨在基于文献计量的方法探索中国高尔夫草坪研究态势。以中国知网(CNKI)和Web of Science(WOS)数据库为文献来源,采用文献计量软件CiteSpace对中国高尔夫草坪研究的年发文量、研究作者与机构、关键词共现网络、突现关键词等进行... 详细信息

本研究旨在基于文献计量的方法探索中国高尔夫草坪研究态势。以中国知网(CNKI)和Web of Science(WOS)数据库为文献来源,采用文献计量软件CiteSpace对中国高尔夫草坪研究的年发文量、研究作者与机构、关键词共现网络、突现关键词等进行可视化分析。研究发现,中国高尔夫草坪研究年发文量呈波动增长趋势,2007-2013年为发文峰值时区;发文量位居前3的机构依次为北京林业大学、深圳大学和中国科学院,发文量最高的作者来自北京林业大学。研究领域主要聚焦于高尔夫草坪管理方法与策略、果岭草坪养护、农药残留及杂草防除等;从研究热点来看,研究趋势从高尔夫草坪营养科学和高尔夫草坪建植科学向高尔夫果岭草坪养护和高尔夫草坪生态保护转变,目前研究主要集中在草坪管理、养护、果岭和施肥等方面。未来中国高尔夫草坪研究应致力于研究内容和研究体系的完善,应在本土化研究和交叉学科应用等方面取得突破。

关键词：中国高尔夫草坪文献计量学草坪养护管理草坪质量生态和谐可持续性发展可视化分析