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An effective bimetallic oxide catalyst of RuO_(2)-Co_(3)O_(4) for alkaline overall water splitting

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Nano Research 2024年第5期17卷 3785-3793页

作者： Fangfang ren Jiayu Xu Ligang Feng college of Chemical and Environmental Engineering Yancheng Teachers UniversityYancheng 224007China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China

The rational design of effective bifunctional electrocatalysts is of paramount importance for overall water-splitting technology in sustainable energy ***,bimetallic oxide catalysts(RuO_(2)-Co_(3)O_(4))derived from Ru combined MOF-derivatives(MOF=metal-organic framework)were demonstrated effective for overall water splitting in an alkaline solution,owing to the combined merits such as the two-dimensional interconnected network structure,the synergetic coupling effects and increased chemical *** as-prepared RuO_(2)-Co_(3)O_(4) only requires an overpotential of 260 mV for oxygen evolution and 75 mV for hydrogen evolution at 10 mA/cm^(2) in 1 M KOH solution;a low cell voltage of 1.54 V was required to reach the kinetic current density of 10 mA/cm^(2) for the water electrolysis when supporting on glass carbon electrode,and very good stability for 40 h was *** and theoretical results demonstrated the electronic structure optimization of bimetallic RuO_(2)-Co_(3)O_(4) compared to the individual metal oxide,which promoted interface charges redistribution and the d-band center downshift,resulting in increased activity and stability for water-splitting *** work provides a feasible approach for developing bimetallic oxides for application in energy-relevant electrocatalysis reactions.

关键词： ruthenium dioxide cobalt oxide metal-organic frameworks heterostructures overall water splitting

Effects of galactooligosaccharide glycation on the functional properties of soy protein isolate and its application in noodles

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Grain & Oil Science and Technology 2024年第3期7卷 159-167页

作者： Meiyue Wang Guanhao Bu Yufei Xing Mengke ren Yang Wang Yijing Xie college of Food Science and Engineering Henan University of TechnologyZhengzhou 450001China

Soybean protein has high nutritional value, but its functional properties are easily affected by external factors,which limits its application in food industry. In the study, soybean protein isolate(SPI) was modified by dry heat glycation of galactooligosaccharides(GOS). The gel properties, antioxidant properties and structural changes of SPI-GOS conjugates were investigated. The application of SPI-GOS conjugates in noodles was also explored. The results observed that the glycation degree of SPI increased with the increasing reaction time. SDS-PAGE and spectral analysis showed the changes of spatial conformation of SPI after glycation. The antioxidant activity of SPI increased after glycation and DPPH radical scavenging activity of SPI-GOS peaked at 48 h of reaction. The hardness, elasticity and resilience of soybean protein gel reached their relative maximum at 48 h, 48 h and 12 h of glycation reaction, respectively. Moreover, the appropriate addition of glycated SPI improved the quality of noodles. The noodles with 4% addition of SPI-GOS had higher hardness, elasticity and tensile properties. This study will provide an effective method to modify soybean protein and expand the use of soybean protein in food industry.

关键词： Soy protein isolate Glycation Galactooligosaccharide Functional properties Noodles

Level　of　coordinated　development　in　economy　and　environment

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Journal of Environmental Sciences 1997年第3期9卷 61-67页

作者： Zhang Qide, Wang Yuxiu, ren Jinsong Liaoning Institute of Environment Protection Science, Shenyang 110031, china Li Delin Shenyang teachers college,Shenyang 110031,china

This article chose natural resource model, social resource model and synthetic model as coordinated development models, and proposed an index of coordination degree to measure the level of coordinated development in regional population-resource economy environment(PREE) system. With this index, the authors also studied a city in Liaoning Province, china,and inquired into its coordination level of the regional PREE system, and pointed out its way to realize coordinated development.

关键词： coordinated development coordination degree coordinated development analysis.

Enhanced cycling stability and rate performance of Co-doped and La_(2)O_(3)-coated LiNi_(0.9)Mn_(0.1)O_(2) toward power battery

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Rare Metals 2024年第2期43卷 658-670页

作者： Jia-Qi Peng Yuan-Yuan Wei Dong-Ming Liu Yun Li Bin Hu Bin Huang Jian-Wen Yang Shun-Hua Xiao ren-Heng Wang Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials College of Chemistry and BioengineeringGuilin University of TechnologyGuilin541004China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen518060China

Ultra-high nickel layered oxide cathode material with high energy density is the most promising material to improve the electrochemical performance of lithium-ion batteries(LIBs).However,the poor structural stability and severe surface/interface side reactions of the material lead to poor rate performance and cyclic stability,which limits its application in *** this paper,the dual-modification strategy of Co doping and La_(2)O_(3) coating is used to meet the above *** doping can effectively widen layer spacing and reduce Li^(+)/Ni^(2+) mixing,and La_(2)O_(3) coating can effectively eliminate the residual alkali on the surface of active material,inhibit the thickening of cathode electrolyte interphase(CEI)film and reduce surface/interface side ***,the modified material(NM90-CL)with excellent electrochemical properties is achieved through the synergistic enhancement of Co doping and La_(2)O_(3) *** capacity retention rate can reach 77.9%after 200 cycles at 1.0℃ and 75.7%after 200 cycles at 5.0℃.Its reversible capacity can up to 153.5 mAh·g^(–1) at 10.0℃.This dual-modification strategy will provide theoretical guidance and technical support for the synthesis of other high-performance electrode materials.

关键词： High nickel cathode material Co doping La_(2)O_(3) coating Electrochemical performance Electrochemical mechanism

POSITIVE SOLUTIONS OF A FOURTH ORDER BOUNDARY VALUE PROBLEM

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Applied Mathematics(A Journal of Chinese Universities) 2003年第2期18卷 138-142页

作者： ren LishunDept. of Math., Zhoukou teachers college, Henan 466000,china. Dept. of Math. Zhoukou Teachers College Henan China

The existence of positive solutions of the nonlinear fourth order problemu (4)(x)=λa(x)f(u(x)), u(0)=u′(0)=u′(1)=u(1)=0is studied, where a:[0,1]→R may change sign, f(0)>0,λ>0 is sufficiently small. Our appr... 详细信息

关键词： fourth-order boundary value problem positive solution Leray-Schauder fixed point theorem.

THE　REACTION　OF　p－NITROPHENYLSULFONYLACETONITRILE　WITH　α，β－UNSATURATED　ESTERS　AND　NITRILES

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Chinese Chemical Letters 1996年第4期7卷 305-308页

作者： Guo ren YUE and Zheng Zhang(Department of Chemistry, Zhangye teachers’ college.Zhangye,734000Department of Chemistry, Nanjing University, Nanjing, 210093) ZHANGYE teachers COLL DEPT CHEMZHANGYE 734000PEOPLES R CHINA NANJING UNIV DEPT CHEMNANJING 210093PEOPLES R CHINA

Michael addition and an unexpected tandem addition-rearrangement reaction occurred when p-nitrophenylsulfonylacetonitrile(1)reacted with α-β-unsaturated estcrs and nitriles (2a-f).Different products can be obtained ... 详细信息

关键词：用成 ESTERS NITRILES OF REACTION THE UNSATURATED WITH AND

乡村教师定向培养政策何以执行偏差——基于“米特-霍恩”政策执行系统模型的分析

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教育发展研究 2024年第6期44卷 42-49页

作者：任强湖州师范学院教师教育学院湖州313000

乡村教师定向培养政策是对我国教师教育体系的制度传承,它有效契合了各省“精准在地”师资培养的需求,日益成为乡村教师补充的重要渠道,但其政策效能却未能充分发挥。政策执行是政策系统的关键,本文基于“米特-霍恩”政策执行系统的模... 详细信息

乡村教师定向培养政策是对我国教师教育体系的制度传承,它有效契合了各省“精准在地”师资培养的需求,日益成为乡村教师补充的重要渠道,但其政策效能却未能充分发挥。政策执行是政策系统的关键,本文基于“米特-霍恩”政策执行系统的模型分析,发现政策执行目标笼统与偏离、执行主体角色模糊与冲突、政策执行机制分割与乏力、政策执行资源短缺与低效等多重因素致使政策执行出现偏差。要治理乡村教师定向培养政策执行的偏差,需搭建组织,建立教师定向培养组织体系;统整理念,以“新乡土性”整合培养实践;完善政策,科学优化教师定向培养政策;强化培养,追求高质量的乡村教师培养;加强评价,创设“以评促建”的提升机制;保障实施,改善政策环境提升政策效能。

关键词：乡村教师定向培养政策政策执行系统模型执行偏差

我国普通高校和体育院校体育产业理论与发展战略研究

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体育科学 2004年第7期24卷 69-73页

作者：任保国滨州师范专科学校体育系山东滨州256604

采用走访、面谈、调查和文献资料调研分析相结合的研究方法 ,在深入分析和研究新世纪我国高校体育产业发展面临的机遇与挑战的前提下 ,深入探讨了我国高校体育产业发展战略的总体思路、战略目标、战略重点以及战略路径 ,并提出了实现新... 详细信息

采用走访、面谈、调查和文献资料调研分析相结合的研究方法 ,在深入分析和研究新世纪我国高校体育产业发展面临的机遇与挑战的前提下 ,深入探讨了我国高校体育产业发展战略的总体思路、战略目标、战略重点以及战略路径 ,并提出了实现新世纪我国高校体育产业发展战略的对策与措施。

关键词：体育产业高等院校发展战略对策措施

我国高校外语教师对超语教学的态度及其影响因素

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外语界 2024年第1期 32-40页

作者：任伟才华北京航空航天大学外国语学院北京1000191

教师态度对超语实践发挥重要作用。本研究通过问卷调查我国高校外语教师对超语教学的态度及其可能的影响因素。结果显示,高校外语教师对超语教学整体持积极态度,非通用语专业教师的态度最为积极,英语专业教师的态度比公共英语教师积极,... 详细信息

教师态度对超语实践发挥重要作用。本研究通过问卷调查我国高校外语教师对超语教学的态度及其可能的影响因素。结果显示,高校外语教师对超语教学整体持积极态度,非通用语专业教师的态度最为积极,英语专业教师的态度比公共英语教师积极,但后两组教师的态度并无显著性差异。教师的年龄、教龄与其对超语教学的态度不显著相关。研究结果有助于超语研究理论框架完善和我国高校外语教师发展。

关键词：超语超语教学态度外语教师