Prof. Jiang San Ping (蒋三平)访问E01小组Carbon Nanotubes as supports for energy conversion and storage: Effect of electron tunneling

Wed, 06/03/2015 - 10:00


Fuels and Energy Technology Institute & Department of Chemical Engineering,
Curtin University, Australia

“Electron tunneling occurs when the potential energy acting on the electron in the space between the reacting pair is higher than the energy of the electron in its initial localized site.”—Marcus and Sutin, Biochimica et Biophysica Acta 811, 265-322 (1985). Carbon nanotubes (CNTs) are seamless cylinders composed of one or more curved layers of graphene with either open or closed ends, and have been extensively used as catalysts supports for its unique properties such as large specific surface area, excellent chemical and mechanical properties and high electrical conductivity. In this talk, we show experimentally that electron tunneling occurs on CNTs composed of 2-3 concentric tubes or walls and such electron tunneling effect significantly promotes the kinetics of the electrochemical reactions for the oxygen evolution reaction (OER) in alkaline solutions as compared with typical single-walled and multi-walled CNTs (SWNTs & MWNTs). The number of inner tubes of CNTs has significant effect on the electrocatalytic activity of Pt and Pd nanoparticles on the electrooxidation reactions of ethanol, methanol, ethylene glycol and formic acid of direct alcohol fuel cells. Such electron tunneling of CNTs also plays a vital role in the direct electron transfer (DET) of proteins/enzymes such as glucose oxidase, GOX.

蒋三平教授为国际知名的燃料电池科学家,已在高水平学术期刊上发表了近290篇文章,文章总被引用率10,500次,h-因子58。另有多部知名出版社(Springer-Verlag, Taylor and Francis Group)特邀专著与编写章节。并在国际会议多次做邀请报告。他的主要研究方向为固体氧化物燃料电池阴极的活化机理以及活化动力;镍基阳极及H2氧化反应机理;纳米结构电极、电极/电解质界面现象、自组装多层高聚物电解质膜直接甲醇燃料电池等.





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