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In situ formation of iron-cobalt sulfides embedded in N,S-doped mesoporous carbon as efficient electrocatalysts for oxygen reduction reaction

文献类型：期刊论文

作者Guo, Dakai; Han, Sancan1; Ma, Ruguang2; Zhou, Yao2; Liu, Qian2; Wang, Jiacheng2; Zhu, Yufang1
刊名MICROPOROUS AND MESOPOROUS MATERIALS
出版日期2018
卷号270页码:1
关键词Iron-cobalt sulfides Carbon Electrocatalysts Oxygen reduction reaction
ISSN号1387-1811
DOI10.1016/j.micromeso.2018.04.044
英文摘要Transition metal sulfides-based materials, as one type of promising oxygen reduction reaction (ORR) electro-catalysts have drawn increasing attention. Herein, we proposed a facile strategy to prepare iron-cobalt sulfides embedded in N,S-doped mesoporous carbon (FexCo1-xS-T@NS-MC) via in situ polymerization and pyrolysis. Various characterization methods (e.g., Raman, BET, XPS, and electrochemical tests) are used to explore the differences between the microstructure and catalytic activity of these electrocatalysts. Notably, the sample Fe0.5Co0.5S-1000@NS-MC pyrolyzed at 1000 degrees C with an optimal iron/cobalt molar ratio (x = 0.5) exhibits the best ORR performance, which has the positive onset potential of 0.947 V vs. RHE, half-wave potential of 0.842 V vs. RHE and a large limiting current density of 5.63 rnA cm(-2). Moreover, the results obtained from RRDE measurements indicate a four-electron process towards ORR for Fe0.5Co0.5S-1000@NS-MC catalyst. The combination and synergy of the controllable active centers (Fe-adjusted Co9S8/CoS with appropriate ratios) and hierarchical porous structures with large specific surface area render the outstanding ORR activity and electrochemical stability. Those results indicate that bimetallic sulfides-based materials are promising as ORR electrocatalysts.
学科主题Chemistry, Applied ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号WOS:000440529000001
出版者ELSEVIER SCIENCE BV
资助机构The authors are grateful to the financial support from the National Natural Science Foundation of China (51572172), the National Key Research and Development Program of China (2016YFB0700204), and One Hundred Talent Plan of Chinese Academy of Sciences. ; The authors are grateful to the financial support from the National Natural Science Foundation of China (51572172), the National Key Research and Development Program of China (2016YFB0700204), and One Hundred Talent Plan of Chinese Academy of Sciences.
源URL[http://ir.sic.ac.cn/handle/331005/24637]  
专题中国科学院上海硅酸盐研究所
作者单位1.Univ Shanghai Sci & Technol, Sch Mat Sci & Engn, 516 Jungong Rd, Shanghai 200093, Peoples R China
2.Shanghai Innovat Inst Mat, Shanghai 200444, Peoples R China
3.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, 1295 Dingxi Rd, Shanghai 200050, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Dakai,Han, Sancan,Ma, Ruguang,et al. In situ formation of iron-cobalt sulfides embedded in N,S-doped mesoporous carbon as efficient electrocatalysts for oxygen reduction reaction[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2018,270:1, 9.
APA Guo, Dakai.,Han, Sancan.,Ma, Ruguang.,Zhou, Yao.,Liu, Qian.,...&Zhu, Yufang.(2018).In situ formation of iron-cobalt sulfides embedded in N,S-doped mesoporous carbon as efficient electrocatalysts for oxygen reduction reaction.MICROPOROUS AND MESOPOROUS MATERIALS,270,1.
MLA Guo, Dakai,et al."In situ formation of iron-cobalt sulfides embedded in N,S-doped mesoporous carbon as efficient electrocatalysts for oxygen reduction reaction".MICROPOROUS AND MESOPOROUS MATERIALS 270(2018):1.

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来源：上海硅酸盐研究所

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