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Ni-N Doped Porous Carbon for Electrocatalytic Reduction of CO2 into CO Driven by Solar Energy Ni-N掺杂多孔碳在太阳能驱动下电催化还原CO2成CO的研究
University Chemistry Pub Date : 2020-01-01 DOI: 10.3866/pku.dxhx201912044
Ding Shaosong, Y. Tong, Wang Xingpu, Gao Jian’an, Z. Ying
{"title":"Ni-N Doped Porous Carbon for Electrocatalytic Reduction of CO2 into CO Driven by Solar Energy","authors":"Ding Shaosong, Y. Tong, Wang Xingpu, Gao Jian’an, Z. Ying","doi":"10.3866/pku.dxhx201912044","DOIUrl":"https://doi.org/10.3866/pku.dxhx201912044","url":null,"abstract":": The electroreduction of CO 2 into value-added chemicals and fuels has garnered a broad interest by using renewable clean energy, due to both alleviating global warming and completing the carbon cycle. Herein, a high-performance Ni-N doped porous carbon catalyst was prepared through pyrolysis of hydrogen containing peptone, NiCl 2 , and NaCl made by a freeze dry method. The Ni-N-doped porous carbon catalyst displayed an excellent performance of CO 2 electroreduction with a Faraday efficiency of 92.0% at − 0.66 V ( vs . RHE), 550 mV overpotential ， and 2.5 mA · cm − 2 current density. The catalytic performances were attributed to the Ni-N active sites and porous structures. In addition, CO 2 electroreduction to CO was performed continuously by using solar energy, which may provide a valuable reference for carbon cycle in future.","PeriodicalId":23447,"journal":{"name":"University Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70220707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Catalysts for Establishing an Interesting Class of Element Chemistry 建立一个有趣的元素化学类别的催化剂
University Chemistry Pub Date : 2020-01-01 DOI: 10.3866/pku.dxhx202002043
Xianyong Lu
{"title":"Catalysts for Establishing an Interesting Class of Element Chemistry","authors":"Xianyong Lu","doi":"10.3866/pku.dxhx202002043","DOIUrl":"https://doi.org/10.3866/pku.dxhx202002043","url":null,"abstract":"","PeriodicalId":23447,"journal":{"name":"University Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70221193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Application of Blended Teaching in Classroom Teaching of Organic Chemistry Experiment 混合式教学在有机化学实验课堂教学中的应用
University Chemistry Pub Date : 2020-01-01 DOI: 10.3866/pku.dxhx202002035
Yanping Zeng, Ming Li, Hong Lin, Qilin Huang
{"title":"Application of Blended Teaching in Classroom Teaching of Organic Chemistry Experiment","authors":"Yanping Zeng, Ming Li, Hong Lin, Qilin Huang","doi":"10.3866/pku.dxhx202002035","DOIUrl":"https://doi.org/10.3866/pku.dxhx202002035","url":null,"abstract":"","PeriodicalId":23447,"journal":{"name":"University Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70221385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of the Temperature Deviation for Boiling of Liquid and Condensation of Vapor Using Kelvin Equation 用开尔文方程分析液体沸腾和蒸汽冷凝的温度偏差
University Chemistry Pub Date : 2020-01-01 DOI: 10.3866/pku.dxhx202002037
Z. Tao, Shuyong Zhang
{"title":"Analysis of the Temperature Deviation for Boiling of Liquid and Condensation of Vapor Using Kelvin Equation","authors":"Z. Tao, Shuyong Zhang","doi":"10.3866/pku.dxhx202002037","DOIUrl":"https://doi.org/10.3866/pku.dxhx202002037","url":null,"abstract":": The discrepancies for calculating condensation temperature and boiling temperature for droplet and small bubble using Kelvin equation were discussed. The discrepancies can be ascribed to the neglect of variation of the vapor pressure of curved surface to plain surface with temperature, and the misusing of Kelvin equation for small bubble during boiling. The way to reduce the discrepancy is introduced while the applicability of Kelvin equation is discussed.","PeriodicalId":23447,"journal":{"name":"University Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70221520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Preliminary Study on the Online Teaching of Materials Chemistry 《材料化学》在线教学初探
University Chemistry Pub Date : 2020-01-01 DOI: 10.3866/pku.dxhx202003012
LIShan YUANYuan, He Juan, Li Kai
{"title":"A Preliminary Study on the Online Teaching of Materials Chemistry","authors":"LIShan YUANYuan, He Juan, Li Kai","doi":"10.3866/pku.dxhx202003012","DOIUrl":"https://doi.org/10.3866/pku.dxhx202003012","url":null,"abstract":": At the beginning of the New Year in 2020, Corona Virus Disease 2019 (COVID-19) suddenly swept across the country. In order to prevent the infection caused by crowd, “Suspended classes but not stop teaching and learning” was proposed by the Ministry of Education. Students in local colleges and universities show obvious variations in self-discipline, consciousness and initiative. Such a practical situation brings us a great challenge to effectively carry out the online teaching for chemistry major. Taking the online teaching of “Materials Chemistry” as an example, this paper introduces the process of online teaching of chemistry major in the local universities. In view of the problems encountered in the teaching process and the solutions adopted, this paper summarizes the issues needing attention during the online teaching. It is hoped that this paper can provide some useful reference for the online teaching of chemistry major in local colleges and universities.","PeriodicalId":23447,"journal":{"name":"University Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70222010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A One-Stop Organic Chemistry Online Flipped Classroom Teaching Practice Based on MOOC 基于MOOC的一站式有机化学在线翻转课堂教学实践
University Chemistry Pub Date : 2020-01-01 DOI: 10.3866/pku.dxhx202004025
Minhui Cao, Wei Shi, Honghu Jiang, Shen Xu
{"title":"A One-Stop Organic Chemistry Online Flipped Classroom Teaching Practice Based on MOOC","authors":"Minhui Cao, Wei Shi, Honghu Jiang, Shen Xu","doi":"10.3866/pku.dxhx202004025","DOIUrl":"https://doi.org/10.3866/pku.dxhx202004025","url":null,"abstract":"Under the case of novel coronavirus (COVID 19), and in response to the Ministry of Education’s call for “postponement of school without suspension of learning”, online teaching should be equivalent to the real class teaching. Based on Chinese University MOOC platform, this paper establishes SPOC on campus with the open online course Organic Chemistry as the online learning resource. Before class, students learn online video and self-testing. The teacher will answer questions and interact with students through live broadcasting. The student will practice and consolidate after school. “One-stop” solves the learning needs of the three stages of online flipped classroom and demonstrates online flipped classroom teaching effect.","PeriodicalId":23447,"journal":{"name":"University Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70222426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Virtual Simulation Experimental System in Online Teaching of the Laboratory Course 实验课程在线教学中的虚拟仿真实验系统
University Chemistry Pub Date : 2020-01-01 DOI: 10.3866/pku.dxhx202003050
Ying Ma, Heng Zhang, Qi-Long Song, Qi-Gao Hu
{"title":"Virtual Simulation Experimental System in Online Teaching of the Laboratory Course","authors":"Ying Ma, Heng Zhang, Qi-Long Song, Qi-Gao Hu","doi":"10.3866/pku.dxhx202003050","DOIUrl":"https://doi.org/10.3866/pku.dxhx202003050","url":null,"abstract":": Due to the outbreak of the COVID-19 epidemic, the new semester has been postponed. But in order to continue teaching and student training work, teachers from colleges are efficiently utilizing internet education resources, and actively carry out online teaching. This paper uses one of the virtual simulation experiment projects at Shandong University, as an example. It introduces how to conduct online laboratory training and teaching in inorganic and analytical chemistry laboratory by utilizing the combination of virtual simulation experiment projects and online resources, and help student learn the theory and operation of iodometry titration.","PeriodicalId":23447,"journal":{"name":"University Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70222614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Teaching Practice of Structural Chemistry under the Novel Coronavirus: Combining Teaching and Research to Improve Learning Enthusiasm 新型冠状病毒下结构化学教学实践:教研结合提高学习积极性
University Chemistry Pub Date : 2020-01-01 DOI: 10.3866/pku.dxhx202004064
Shuang Mao
{"title":"Teaching Practice of Structural Chemistry under the Novel Coronavirus: Combining Teaching and Research to Improve Learning Enthusiasm","authors":"Shuang Mao","doi":"10.3866/pku.dxhx202004064","DOIUrl":"https://doi.org/10.3866/pku.dxhx202004064","url":null,"abstract":": Owing to the control and prevention of novel coronavirus, “online teaching” is generally suggested. The online teaching quality depends on teaching skills and students’ enthusiasm. The teaching practice of structural chemistry based on teaching and research activities, electronic records, group sharing and course ideology are introduced.","PeriodicalId":23447,"journal":{"name":"University Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70223093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Focus on the Water Quality of Yangtze River: Social Practice of “Trace of the Green Line” 关注长江水质:“绿线痕迹”的社会实践
University Chemistry Pub Date : 2020-01-01 DOI: 10.3866/pku.dxhx202004075
Yiping Zhang, Shuqin Zhang, Zirun Zhao, Zhiheng Xu, Songyang Wang, Yuhang Zhang, M. Yang, Xuanlin Yu, Yaxian Zhu
{"title":"Focus on the Water Quality of Yangtze River: Social Practice of “Trace of the Green Line”","authors":"Yiping Zhang, Shuqin Zhang, Zirun Zhao, Zhiheng Xu, Songyang Wang, Yuhang Zhang, M. Yang, Xuanlin Yu, Yaxian Zhu","doi":"10.3866/pku.dxhx202004075","DOIUrl":"https://doi.org/10.3866/pku.dxhx202004075","url":null,"abstract":"","PeriodicalId":23447,"journal":{"name":"University Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70223113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Temperature Compensation Method to Solve the Fractionation Effect in the Experiment of Binary Vapor-Liquid Equilibrium System Phase Diagram 解决二元气液平衡系统相图实验中分馏效应的温度补偿方法
University Chemistry Pub Date : 2020-01-01 DOI: 10.3866/pku.dxhx201905002
Liping Song, Yating Wang, Ou Zheng, Shuting Wu, Shuying Zhu, Jianzhong Chen
{"title":"Temperature Compensation Method to Solve the Fractionation Effect in the Experiment of Binary Vapor-Liquid Equilibrium System Phase Diagram","authors":"Liping Song, Yating Wang, Ou Zheng, Shuting Wu, Shuying Zhu, Jianzhong Chen","doi":"10.3866/pku.dxhx201905002","DOIUrl":"https://doi.org/10.3866/pku.dxhx201905002","url":null,"abstract":"In this paper, the device for phase diagram development experiment has been modified, which can be used to measure the boiling point and dew point of vapor-liquid equilibrium system simultaneously. In addition, the vapor-liquid phase diagrams of cyclohexane-ethanol under the conditions of no heat preservation, heat preservation and temperature compensation are drawn and compared. Results show that there is a great difference between the temperatures of boiling point and dew point both for the vapor-liquid equilibrium system with the simple heat preservation or without the heat preservation, and the vapor-phase lines based on the boiling point temperature are seriously distorted. With the temperature compensation for the system, the two vapor-phase lines according to the boiling point and the dew point temperature are in good agreement, which means the problem of vapor-phase fractionation effect has been solved.","PeriodicalId":23447,"journal":{"name":"University Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70215292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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