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Strong metal–support interaction boosts the electrocatalytic hydrogen evolution capability of Ru nanoparticles supported on titanium nitride

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Carbon Energy 2024年第1期6卷 245-254页

作者： Xin Wang Xiaoli Yang Guangxian Pei Jifa Yang junzhe liu Fengwang Zhao Fayi Jin Wei Jiang Haoxi Ben Lixue Zhang College of Chemistry and Chemical Engineering Collaborative Innovation Center for Hydrogen Energy Key Materials and Technologies of Shandong ProvinceQingdao UniversityQingdaoShandongChina State Key Laboratory of Bio-fibers and Eco-Textiles Qingdao UniversityQingdaoShandongChina Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of ScienceQingdaoShandongChina

Ruthenium(Ru)has been regarded as one of the most promising alternatives to substitute Pt for catalyzing alkaline hydrogen evolution reaction(HER),owing to its inherent high activity and being the cheapest platinum-group ***,based on the idea of strong metal–support interaction(SMSI)regulation,Ru/TiN catalysts with different degrees of TiN overlayer over Ru nanoparticles were fabricated,which were applied to the alkaline electrolytic *** reveal that the TiN overlayer would gradually encapsulate the Ru nanoparticles and induce more electron transfer from Ru nanoparticles to TiN support by the Ru–N–Ti bond as the SMSI degree *** study shows that the exposed Ru–TiN interfaces greatly promote the H_(2) desorption ***,the Ru/TiN-300 with a moderate SMSI degree exhibits excellent HER performance,with an overpotential of 38 mV at 10 mA cm^(−2).Also,due to the encapsulation role of TiN overlayer on Ru nanoparticles,it displays super long-term stability with a very slight potential change after 24 *** study provides a deep insight into the influence of the SMSI effect between Ru and TiN on HER and offers a novel approach for preparing efficient and stable HER electrocatalysts through SMSI engineering.

关键词： electronic structure hydrogen evolution reaction ruthenium strong metal-support interaction titanium nitride

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战略性新兴产业国际竞争力培育:理论逻辑与案例印证

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东南学术 2024年第5期 173-182页

作者：刘俊哲南京大学商学院

国内超大规模市场是本土战略性新兴产业参与新一轮国际竞争的重要优势。基于辽阔国土空间所形成的丰富市场应用场景,是培育产业链现代化动态竞争力的关键基础;基于庞大人口规模所形成的有效市场供需体量,是培育全产业链降本提质增效竞... 详细信息

国内超大规模市场是本土战略性新兴产业参与新一轮国际竞争的重要优势。基于辽阔国土空间所形成的丰富市场应用场景,是培育产业链现代化动态竞争力的关键基础;基于庞大人口规模所形成的有效市场供需体量,是培育全产业链降本提质增效竞争力的内在动力;基于海量市场主体所形成的完备国民经济体系,是培育产业链供应链独立自主安全可控竞争力的重要因素。培育和提升战略性新兴产业国际竞争力,要利用丰富市场应用场景助推技术与产品更新迭代和产能结构优化升级,依托有效市场供需体量实现规模生产和技术迭代,凭借完备国民经济体系建立本土产业链供应链。

关键词：国内超大规模市场国际竞争力战略性新兴产业光伏产业

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摩尔比对MMOS水泥力学性能和变形行为的影响及机理

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建筑材料学报 2024年第8期27卷 733-743页

作者：巴明芳马哲洋纪璐鑫崔嘉铭柳俊哲宁波大学土木工程与地理环境学院浙江宁波315211 青岛农业大学建筑工程学院山东青岛266109

研究了原材料摩尔比(n(MgO)∶n(MgSO_(4))∶n(H_(2)O))对改性硫氧镁(MMOS)水泥力学性能和变形行为的影响,并采用X射线衍射仪(XRD)、扫描电镜(SEM)、傅里叶变换红外光谱(FTIR)及热重分析(TG)等测试技术对其机理进行分析.结果表明:MMOS水... 详细信息

研究了原材料摩尔比(n(MgO)∶n(MgSO_(4))∶n(H_(2)O))对改性硫氧镁(MMOS)水泥力学性能和变形行为的影响,并采用X射线衍射仪(XRD)、扫描电镜(SEM)、傅里叶变换红外光谱(FTIR)及热重分析(TG)等测试技术对其机理进行分析.结果表明:MMOS水泥的抗压强度和抗折强度随着水硫比和氧硫比的提高均呈提升趋势.其中原材料摩尔比为10∶1∶12时,水泥力学性能最优.不同摩尔比MMOS水泥在56d龄期内均呈膨胀变形,其中总变形随水硫比和氧硫比的提高呈减小趋势;自收缩变形随水硫比的提高而减小,随氧硫比的提高呈先增后减趋势.这主要是由于硬化后不同摩尔比MMOS水泥中的水化产物Mg(OH)_(2)和5·1·7相(5Mg(OH)_(2)·MgSO_(4)·7H_(2)O)含量各有不同.当Mg(OH)_(2)含量减少,而5·1·7相含量增加时,MMOS水泥的膨胀变形量降低,同时其抗折强度和抗压强度有所提升.

关键词：摩尔比改性硫氧镁水泥力学性能体积变形机理分析

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Illuminating the negative thermal expansion mechanism of YFe(CN)_(6)via electronic structure and unusual phonon modes

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Journal of Rare Earths 2023年第8期41卷 1258-1264,I0006页

作者： junzhe liu Yixin Jiao Qilong Gao Qiang Sun Jun Chen Key Laboratory of Materials Physics of Ministry of Education School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China Beijing Advanced Innovation Center for Materials Genome Engineering Department of Physical ChemistryUniversity of Science and Technology BeijingBeijing 100083China

Understanding the negative thermal expansion(NTE)mechanism remains an important and challenging *** this work,we selected the case of YFe(CN)_(6)to investigate the structure-mechanism relation on the base of crystal structure,electro nic structure and lattice *** expanded the NTE of YFe(CN)_(6)to 150 K,and the temperature dependence of volume and lattice constants was determined by temperature-variable synchrotro n X-ray diffraction measure ments.A large NTE was found in the *** theoretical calculations indicate that the Y-N bond exhibits a strong ionic feature through the calculated electron localization function(ELF),which has a strong influence on the anisotropic vibration of the N *** detailed lattice dynamics simulations suggest that the NTE of YFe(CN)_(6)may be related to the presence of the unusual low-frequency modes of the YN_(6)triangular prism(tri-prism)*** optical branches with low frequencies are mainly related to the distortion and twisting modes of the YN_(6)tri-prism units,which contribute most to the NTE effect in the crystal.

关键词： Negative thermal expansion Prussian blue analogues Electronic structure Low-frequency phonons Rareearths

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Rational Design of Electrocatalyst with Abundant Co/MoN Heterogeneous Domains for Accelerating Hydrogen Evolution Reaction

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Chinese Journal of Structural Chemistry 2022年第7期41卷 40-45页

作者： Yu Qiu Jinzheng liu Mengxiao Sun Jifa Yang junzhe liu Xiaoyan Zhang Xuejun liu Lixue Zhang College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China

Developing efficient and durable electrocatalysts for water splitting, which has long been regarded as one of the most promising patterns to produce green hydrogen, is of great significance but still challenging. Herein,ample Co/MoN heterogeneous domains/nitrogen-doped carbon(Co/MoN/NC) nanosheet arrays as high-performance hydrogen evolution reaction(HER) electrocatalyst via a typical nitriding-carbonization strategy are successfully prepared on nickel foam(NF), which exhibits a low overpotential of 29 m V at 10 m A cm, together with excellent durability at 20 m A cmfor 90 h in alkaline solution. Such excellent catalytic property for HER can be attributed to the generation of abundant Co/Mo N heterogeneous structures. Additionally, the high conductivity of Co/Mo N and NC also increases the charge transfer rate, further helping accelerate the reaction rate of HER. This work presents an efficient method for improving the catalytic hydrogen evolution activity in basic solution.

关键词： hydrogen evolution reaction water electrolysis Co/MoN heterogeneous domains

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Preparation and Microstructure of Green Ceramsite Made from Sewage Sludge

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Journal of Wuhan University of Technology(Materials Science) 2012年第1期27卷 149-153页

作者： liu junzhe liu Rui HE Zhimin BA Mingfang LI Yushun School of Civil Engineering Ningbo UniversityNingbo 315211China Department of Civil Engineering University of Colorado DenverUSA

A pilot study was conducted to produce high performance green ceramsite by using sewage sludge, fly ash and silt. According to the theory of Riley, the proportions of raw materials were chosen to perform the sintering experiments. Thereby, the optimum proportion of sludge, fly ash and silt and sintering parameters were determined. The microstructure of the optimized mixture and the leaching of heavy metal elements were also analyzed. The lab testing results show that sintering parameters have significant impact on the performance of ceramsite. For solid waste ceramsite with high loss of ignition, inadequate pre-burning process lowers the strength and increases the water absorption. Low water absorption can be achieved by the enameled surface and closed pore structure. The high performance green ceramsite has the density grade of 700, water absorption of 6% and compressive strength of 6.6 MPa. The ceramsite is mainly composed of cristobalite and mullite. The leaching of heavy metal elements from the solid waste ceramsite are lower than the limits required by the national standard. This study shows that the utilization of solid waste ceramsite as the light Weight aggregate is feasible and safe.

关键词： ceramsite sewage sludge sintering parameters microstructure

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Gut microbiota-derived short-chain fatty acids and depression:deep insight into biological mechanisms and potential

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General Psychiatry 2024年第1期37卷 17-32页

作者： junzhe Cheng Hongkun Hu Yumeng Ju Jin liu Mi Wang Bangshan liu Yan Zhang Department of Psychiatry National Clinical Research Center for Mental DisordersSecond Xiangya Hospital of Central South UniversityChangshaHunanChina Clinical Medicine Eight-Year Program Xiangya School of MedicineCentral South UniversityChangshaHunanChina Mental Health Institute of Central South University China National Technology Institute on Mental DisordersHunan Key Laboratory of Psychiatry and Mental HealthHunan Medical Center for Mental HealthChangshaHunanChina Department of Mental Health Center Xiangya Hospital of Central South UniversityChangshaHunanChina

The gut microbiota is a complex and dynamic ecosystem known as the second brain'.Composing the microbiota-gut-brain axis,the gut microbiota and its metabolites regulate the central nervous system through neural,endocrine and immune pathways to ensure the normal functioning of the organism,tuning individuals'health and disease ***-chain fatty acids(SCFAs),the main bioactive metabolites of the gut microbiota,are involved in several neuropsychiatric disorders,including *** have essential effects on each component of the microbiota-gut-brain axis in *** the present review,the roles of major SCFAs(acetate,propionate and butyrate)in the pathophysiology of depression are summarised with respect to chronic cerebral hypoperfusion,neuroinflammation,host epigenome and neuroendocrine *** remarks on the biological mechanisms related to gut microbiota will hopefully address the clinical value of microbiota-related treatments for depression.

关键词： alterations inflammation perfusion

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Effect of Anti-freezing Admixtures on Alkali-silica Reaction in Mortars

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Journal of Wuhan University of Technology(Materials Science) 2005年第2期20卷 80-82页

作者：柳俊哲 School of Civil Engineering Northeast Forestry University Harbin 150040 China Assoc.Prof

The influence of anti-freezing admixture on the alkali aggregate reaction in mortar was analyzed with accelerated methods. It is confirmed that the addition of sodium salt ingredients of anti-freezing admixture accelerates the alkali silica reaction to some extent, whereas calcium salt ingredient of anti-freezing admixture reduces the expansion of alkali silica reaction caused by high alkali cement. It is found that the addition of the fly ash considerably suppresses the expansion of alkali silica reaction induced by the anti-freezing admixtures.

关键词： anti-freezing admixture alkali-silica reaction reactive aggregates fly ash

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Predicting the Threshold Values based on Diffusion Model of Nitrite Ions in Reinforced Concrete

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Journal of Wuhan University of Technology(Materials Science) 2010年第2期25卷 308-311页

作者：柳俊哲 Department of Civil Engineering Ningbo University

The prediction model for inhibition effect of reinforced concrete was presented based on the Magge＇s model when the concrete surface was brushed with nitrite solution. The influence of the amount of nitrite solution on inhibiting duration was also discussed through a simulation analysis when the amount of solution were 250 g/m^2, 500 g/m^2, 1000 g/m^2 and 1500 g/m^2, respectively. The experimental results confirm that nitrite ion can diffuse well in concrete to reach an effective mol ratio from the surface of the concrete to the surface of the reinforcement, and has an effective protection for the bars against corrosion. The higher the amount of solution, the better it will accelerate getting the threshold value of mol ratio on the surface of rebar, and retarding the time for loosing the effective threshold value of mol ratio. It helps to increase the tendency of inhibiting duration and prolong the life of reinforced concrete. The nitrite solution amount is used to predict the corrosion inhibiting duration of concrete that contains chloride salt.

关键词： reinforced concrete nitrite ion diffusion threshold value

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宗喀巴《密宗道次第广论》的哲学思想探析

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民族学刊 2020年第2期11卷 77-83,138页

作者：刘俊哲西南民族大学哲学学院四川成都610041

宗喀巴指出,佛陀所创正法,唯在于"教""证"两种,"教"是指佛教教理,"证"为修道中的证悟。宗喀巴《密宗道次第广论》具有鲜明的"教"与"证"相结合的特色。此著在"教"方面体现为本体论、佛性论、人生论、道德论、方法论等哲学思想,贯穿于《... 详细信息

宗喀巴指出,佛陀所创正法,唯在于"教""证"两种,"教"是指佛教教理,"证"为修道中的证悟。宗喀巴《密宗道次第广论》具有鲜明的"教"与"证"相结合的特色。此著在"教"方面体现为本体论、佛性论、人生论、道德论、方法论等哲学思想,贯穿于《密宗道次第广论》的哲学主线是中观应成派一切诸法缘起性空论。通过灌顶、诵咒、观想及借助坛城、法器等修各种瑜伽,以亲证或体现这些哲学思想。诸如此类的哲学思想是《密宗道次第广论》所论述的各种修行实践的深刻内涵,而各种修行实践是其外在表现形式。

关键词：宗喀巴《密宗道次第广论》哲学思想性空论

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