S-doped carbon aerogels/GO composites as oxygen reduction catalysts

查看全文 作　　者：Mykola [1]Seredych;Krisztina [2]László;Enrique Rodríguez-[3]Castellón;Teresa [1]J.Bandosz

机构地区：[1]The City College of New York and The Graduate Center of CUNY, Department of Chemistry, 160 Convent Avenue, New York, NY 10031, USA;[2]Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, Budapest 1521, Hungary;[3]Departamento de Quimica Inorganica, Universidad de Malaga, Malaga 29071, Spain

出　　处：《Journal of Energy Chemistry》索引2016年第25卷第2期,共10页

基　　金：supported by the Spanish Ministry of Economy and Competitiveness (Project CTQ2012-37925-C03-03);FEDER funds;by the Hungarian National Fund OTKA K109558 摘　　要：Composites of carbon aerogel and graphite oxide(GO) were synthesized using a self-assembly method based on dispersive forces. Their surface was modified by treatment in hydrogen sulfide at 650 and800 ℃. The samples obtained were characterized by adsorption of nitrogen, TA-MS, XPS, potentiometric titration, and HRTEM and tested as catalysts for oxygen reduction reactions(ORR) in an alkaline medium.The synergistic effect of the composite(electrical conductivity, porosity and surface chemistry) leads to a good ORR catalytic activity. The onset potential for the composite of carbon aerogel heated at 800 ℃ is shifted to a more positive value and the number of electron transfer was 2e-at the potential 0.68 V versus RHE and it increased to 4e-with an increase in the negative values of the potential. An excellent tolerance to methanol crossover was also recorded. 关键词：石墨复合材料还原催化剂碳气凝胶氧化氧还原反应掺杂电位滴定表面化学

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S-doped carbon aerogels/GO composites as oxygen reduction catalysts

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