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Hierarchical Hollow Co 9 S 8 Microspheres: Solvothermal Synthesis, Magnetic, Electrochemical, and Electrocatalytic Properties
Author(s) -
Zhou YuXue,
Yao HongBin,
Wang Yi,
Liu HuiLi,
Gao MinRui,
Shen PeiKang,
Yu ShuHong
Publication year - 2010
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200903263
Subject(s) - electrochemistry , materials science , microsphere , antiferromagnetism , solvothermal synthesis , triethylenetetramine , cathode , lithium (medication) , chemical engineering , paramagnetism , nanotechnology , analytical chemistry (journal) , nuclear chemistry , inorganic chemistry , electrode , chemistry , organic chemistry , medicine , physics , quantum mechanics , endocrinology , engineering , condensed matter physics
A simple solvothermal route in a binary solution of triethylenetetramine (TETA) and deionized water (DIW) has been used to synthesize hierarchical hollow Co 9 S 8 microspheres with high surface area (80.38 m 2 g −1 ). An appropriate volume ratio of TETA:DIW has been found to be essential for the formation of hollow Co 9 S 8 microspheres. The magnetic study indicated that the Co 9 S 8 hollow microspheres are paramagnetic at high temperature and antiferromagnetic at low temperature. The oxygen reduction reaction experiments demonstrated that the onset potential of the Co 9 S 8 sample is 0.88 V, which is comparable to the value predicted for Co 9 S 8 (0.74 V) from the theoretical simulation. The discharge capability of Co 9 S 8 hollow microspheres as cathode materials for lithium ion batteries and their electrocatalytic activity for the oxygen reduction reaction (ORR) have been studied.