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个人信息Personal Information
教授
博士生导师
硕士生导师
任职 : 精细化工全国重点实验室主任，教育部智能材料化工前沿科学中心执行主任，大连理工大学膜科学与技术研究开发中心主任
性别：女
毕业院校：中国科学院大连化物所
学位：博士
所在单位：化工学院
学科：化学工程. 膜科学与技术. 生物医学工程
联系方式：hgaohong@dlut.edu.cn
电子邮箱：hgaohong@dlut.edu.cn
Electrochemical Reduction of CO2 in Proton Exchange Membrane Reactor: The Function of Buffer Layer
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论文类型：期刊论文
发表时间：2017-09-20
发表刊物：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
收录刊物：Scopus、SCIE、EI
卷号：56
期号：37
页面范围：10242-10250
ISSN号：0888-5885
摘要：Electroreduction of CO2 is performed in proton exchange membrane reactors (PEMRs) with a buffer layer to investigate the critical factors that determine the cell performance. The buffer layer has the function of ensuring sufficient cathode potential (above the potential threshold of Cu, Sn, and In catalysts at around -1.3 to -1.4 V) compared with the limited cathode potential in the conventional PEMR, therefore a high hydrogenation rate (i.e., 89.8 nmol cm(-2)s(-1) at -1.8 V) is achieved. The buffer layer exhibits good ability to suppress H-2 evolution, however, the current efficiency of HCOOH decreases by over 50% after the buffer solution is saturated with protons (after 10 h reaction). Improving CO, mass transfer at the reaction interface by adding tetrahydrofuran (THF) in a buffer layer or zeolitic imidazolate framework with a leaf-like morphology (ZIFL) in the catalyst layer, the current efficiency of HCOOH can be increased by around 10-15%.