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Highly Efficient Hydrogenation of Methyl Propionate to Propanol over Hydrous Zirconia Supported Ruthenium

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Chinese Journal of Chemistry 2011年第2期29卷 229-236页

作者： fan guangyin Zhou Yafen Fu Haiyan Ye Xiaoli Li Ruixiang Chen Hua Li Xianjun Key Lab of Green Chemistry and Technology Ministry of Education College of Chemistry Sichuan University Chengdu Sichuan 610064 China College of Chemistry and Chemical Engineering China West Normal University Nanchong Sichuan 637002 China

Hydrous zirconia supported ruthenium catalyst Ru/ZrO2 xH2O, prepared by co-precipitating ruthenium trichloride and zirconium oxychloride with ammonia, was able to catalyze efficiently methyl propionate to propanol under the mild conditions. In aqueous system, the propanol yield of 〉99% was achieved under the conditions of reaction temperature of 150 ℃ and hydrogen pressure of 5.0 MPa, while in non-aqueous system the maximum propanol yield was only 47.0%. FTIR spectra and hydrogenation results indicated that the high catalytic performance of Ru/ZrO2 xH2O in aqueous phase results from the cooperation effect between water as a solvent and hydroxyl groups on the surtace of carrier.

关键词： ruthenium zirconium carboxylic acid ester alcohol hydrogenation

Sustainable synthesis of supported metal nanocatalysts for electrochemical hydrogen evolution

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Chinese Journal of Catalysis 2020年第12期41卷 1791-1811页

作者： Qian Chen Yao Nie Mei Ming guangyin fan Yun Zhang Jin-Song Hu College of Chemistry and Materials Science Sichuan Normal UniversityChengdu 610068SichuanChina College of Chemistry Chongqing Normal UniversityChongqing 410033China Beijing National Laboratory for Molecular Sciences(BNLMS) CAS Key Laboratory of Molecular Nanostructure and NanotechnologyInstitute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China

Among the various types of heterogeneous catalysts,supported metal nanocatalysts(SMNCs)have attracted widespread interest in chemistry and materials science,due to their advantageous features,such as high efficiency,stability,and reusability for catalytic ***,to obtain well-defined SMNCs and inhibit nanoparticle aggregation,traditional approaches generally involve numerous organic reagents,complex steps,and specialized equipment,thus hindering the practical and large-scale synthesis of *** this review,we summarize green and sustainable synthetic methodologies for the assembly of SMNCs,including low temperature pyrolysis and solid-state,surfactant-and reductant-free,and ionic liquid assisted *** conventional application of SMNCs for electrochemical hydrogen evolution and the corresponding achievements are subsequently ***,future perspectives toward the sustainable production of SMNCs are presented.

关键词： Supported metal nanocrystals Sustainable production Green synthesis Electrocatalysis Hydrogen evolution reaction

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Sustainable solid-state synthesis of uniformly distributed PdAg alloy nanoparticles for electrocatalytic hydrogen oxidation and evolution

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Chinese Journal of Catalysis 2021年第2期42卷 251-258页

作者： Caili Xu Qian Chen Rong Ding Shengtian Huang Yun Zhang guangyin fan College of Chemistry and Materials Science Sichuan Normal UniversityChengdu 610068SichuanChina Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan College of Chemistry and Environment EngineeringSichuan University of Science and EngineeringZigong 643000SichuanChina

New sustainable syntheses based on solid-state strategies have sparked enormous attention and provided novel routes for the synthesis of supported metallic alloy nanocatalysts(SMACs).Despite considerable recent progress in this field,most of the developed methods suffer from either complex operations or poorly controlled morphology,which seriously limits their practical ***,we have developed a sustainable strategy for the synthesis of PdAg alloy nanoparticles(NPs)with an ultrafine size and good dispersion on various carbon matrices by directly grinding the precursors in an agate mortar at room ***,no solvents or organic reagents are used in the synthesis *** simple and green synthesis procedure provides alloy NPs with clean surfaces and thus an abundance of accessible active *** on the combination of this property and the synergistic and alloy effects between Pd and Ag atoms,which endow the NPs with high intrinsic activity,the PdAg/C samples exhibit excellent activities as electrocatalysts for both the hydrogen oxidation and evolution reactions(HOR and HER)in a basic ***9Ag1/C showed the highest activity in the HOR with the largest j0,m value of 26.5 A g Pd^–1 and j0,s value of 0.033 mA cmPd^–2,as well as in the HER,with the lowest overpotential of 68 mV at 10 mA cm^–*** this synthetic method can be easily adapted to other systems,the present scalable solid-state strategy may open opportunity for the general synthesis of a wide range of well-defined SMACs for diverse applications.

关键词： Solid-state synthesis Supported metallic alloy nanoparticles Electrocatalysis Hydrogen oxidation reaction Hydrogen evolution reaction

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认知范式与政治价值体系之建构

天津社会科学 2009年第5期 57-63页

作者：张铭范广垠山东大学威海分校法学院苏州大学政治与公共管理学院

政治价值体系是社会政治生活的深层次意义结构,各种政治价值体系的形成与建构虽然都有着复杂的背景,但又都是在一定的时代认知范式中进行的。历史上人类的认知范式大体上存在普遍主义、历史主义、后现代主义三种形态,以这三种认知范式... 详细信息

政治价值体系是社会政治生活的深层次意义结构,各种政治价值体系的形成与建构虽然都有着复杂的背景,但又都是在一定的时代认知范式中进行的。历史上人类的认知范式大体上存在普遍主义、历史主义、后现代主义三种形态,以这三种认知范式为背景而生成的政治价值体系,各有各的特色,也各有各的利弊。认真地分析了解这些认知范式,在扬长避短的基础上提供建构当代中国政治价值体系的新思路,是我们应该去直面的一个重要历史任务。

关键词：政治价值体系建构认知范式普遍主义历史主义后现代主义

Tackling the microlensing wave effects of strong lensing gravitational waves with TAAH

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 257-258页

作者： Zuhui fan South-Western Institute for Astronomy Research Yunnan University

The rapid development of gravitational wave（GW） observations since their first detection in 2015 [1] has opened a completely new window for exploring the Universe. Consequently, astronomical research has entered the multimessenger era, allowing us to use different tracers to view the cosmos from various perspectives. Among others, the appealing application of gravitational wave events from compact binary mergers is that they can act as standard sirens to determine absolute cosmic distances entirely independent of standard candles. This approach is one of the most promising means to solve the current H0tension problem.

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Soluble epoxide hydrolase:a next-generation drug target for Alzheimer's disease and related dementias

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Neural Regeneration Research 2025年第9期20卷 2585-2586页

作者： Andrew Gregory Chengyun Tang fan fan Department of Physiology Medical College of GeorgiaAugusta UniversityAugustaGAUSA

Alzheimer's disease(AD)and Alzheimer's diseaserelated dementias(ADRD)represent a significant public health challenge,with projections indicating a substantial increase in affected individuals due to the aging global *** the World Health Organization,AD/ADRD has affected more than 55 million individuals worldwide,with an additional 10 million cases diagnosed each year.

关键词： Alzheimer population drug

Reconstructing forest and grassland cover changes in China over the past millennium

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Science China Earth Sciences 2025年第1期68卷 94-110页

作者： fanneng HE fan YANG Yafei WANG Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Key Research Institute of Yellow River Civilization and Sustainable Development Henan University University of Chinese Academy of Sciences

Historical forest and grassland cover changes not only are critical indicators for quantifying ecological and environmental change processes but also serve as fundamental data for long-term climate change simulations and terrestrial ecosystem carbon emission assessments. However, because of limitations in historical data, quantitative estimations and spatially gridded reconstructions of these changes remain challenging, necessitating further methodological exploration. This study focused on China's present-day land area over the past millennium, objectively capturing the characteristics and drivers of forest and grassland cover changes. On this basis, using the forest transition theory and the space-for-time substitution method, we depicted the historical deforestation process as an inverted “S” curve and developed a model to reconstruct historical forest area changes based on the functional relationship between the forest area and population size dynamics. Subsequently, a gridded forest allocation model was established on the basis of deforestation tendencies. For the grassland cover, we implemented regionspecific methods, such as the cropland area deduction method and the habitat constraint method, to quantitatively reconstruct historical changes. Consequently, we obtained provincial forest and grassland area changes over the past millennium and mapped 10-km-resolution gridded data of forest and grassland cover. The results indicated the following.(1) The methods developed using population data as a proxy objectively reproduced the spatiotemporal evolution of forest and grassland cover in China over the past millennium. These feasible methods offer a novel pathway for the quantitative reconstruction of historical forest and grassland cover changes.(2) The data indicated that China's forest area generally decreased over the past millennium, characterized by a “decrease-then-increase” pattern. The forest area experienced three distinct phases: a slow decline(AD 1000

关键词： Land use and land cover change Forest Grassland Quantitative reconstruction Gridded reconstruction China historical period

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纳米Ru催化剂催化喹啉加氢反应

催化学报 2007年第11期28卷 975-979页

作者：陈骏薛芳付海燕樊光银袁茂林陈华李贤均四川大学化学学院有机金属络合催化研究所绿色化学与技术教育部重点实验室四川成都610064

制备了高分散性负载型5%Ru/C催化剂,采用X射线衍射、X射线光电子能谱和高分辨透射电镜对催化剂进行了表征.结果表明,所制得的5%Ru/C催化剂分散度高,金属钌的平均粒径小于5nm.在喹啉加氢反应中,催化剂显示出很高的催化活性和生成1,2,3,4... 详细信息

制备了高分散性负载型5%Ru/C催化剂,采用X射线衍射、X射线光电子能谱和高分辨透射电镜对催化剂进行了表征.结果表明,所制得的5%Ru/C催化剂分散度高,金属钌的平均粒径小于5nm.在喹啉加氢反应中,催化剂显示出很高的催化活性和生成1,2,3,4-四氢喹啉的选择性,但未检测到十氢喹啉生成.补加新鲜催化剂后,1,2,3,4-四氢喹啉可全部转化为十氢喹啉.对喹啉加氢机理进行了探讨.

关键词：钌活性炭催化加氧喹啉 1 2 3 4.四氢喹啉十氢喹啉

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消费主义新议:功能、动因与规范

宿州学院学报 2023年第1期38卷 4-7页

作者：陈华典范广垠安徽大学社会与政治学院安徽合肥230000

消费主义指的是超越基本需求而有更高更多追求的消费。消费主义不仅可用于炫耀,还可用于公民情感和价值观的表达。近年来,表现性消费行为频发,消费主义有了新的表现形式,且发展出一些新功能,如促进社会可持续发展、完善新兴产业市场、... 详细信息

消费主义指的是超越基本需求而有更高更多追求的消费。消费主义不仅可用于炫耀,还可用于公民情感和价值观的表达。近年来,表现性消费行为频发,消费主义有了新的表现形式,且发展出一些新功能,如促进社会可持续发展、完善新兴产业市场、弘扬爱国主义精神等。信息时代大众传媒的发展为消费者的需求表达提供了基础性的技术条件。消费主义行为及其作用具有不确定性,规范与引导消费者行为,发挥消费主义的正向功能,对社会发展具有重要的现实意义。

关键词：消费主义消费消费者公民