Positively charged carbon electrocatalyst for enhanced power performance of L-ascorbic acid fuel cells

作     者：Myounghoon Choun Hye Jin Lee Jaeyoung Lee 

作者机构：Electrochemical Reaction and Technology Laboratory School of Environmental Science and Engineering GIST Department of Chemistry and Green-Nano Materials Research Center Kyungpook National University Ertl Center for Electrochemistry and Catalysis Research Institute for Solar and Sustainable Energies (RISE) GIST 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2016年第25卷第5期

页      面：793-797页

核心收录：

学科分类：0820[工学-石油与天然气工程] 0808[工学-电气工程] 081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 0703[理学-化学] 

基　　金：supported by the New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) granted financial resource from the Ministry of Trade  Industry & Energy  Republic of Korea (20153030031720) 

主　　题：Vitamin-C electrooxidation Electronegativity Carbon Atomic charge Surface oxygen 

摘      要：Carbon surface with large oxygen and carbon ratio(O/C) indicated an outstanding electro-catalytic activity toward L-ascorbic acid oxidation, compared to platinum group metals. However, interrelation of surface functional groups and its electro-catalytic activity is still unclear. In this paper, we prepared different levels of oxidized carbons by a simple acid treatment and investigated the correlation between the surface oxygen functional groups of acid-treated carbon and electro-catalytic activity in an electrooxidation of L-ascorbic acid. Positively charged carbon was demonstrated by lone pair electron of oxygen from valence band spectra study. It was revealed that the positively charged carbon, especially involved in carbonyl, showed enhanced the electro-catalytic activity through both better adsorption of negatively charged reactants and lowered LUMO by electronegativity of oxygen.