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Surfactant‐Assisted Fabrication of Cubic Cobalt Oxide Hybrid Hollow Spheres as Catalysts for the Oxygen Reduction Reaction
Author(s) -
Zhong Haihong,
Wang Jing,
Wang Tiehong,
Zhang Shuwei,
Li Dianqing,
Tang Pinggui,
AlonsoVante Nicolas,
Feng Yongjun
Publication year - 2018
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201800487
Subject(s) - electrocatalyst , cobalt oxide , catalysis , materials science , cobalt , oxide , pyrolysis , chemical engineering , carbon fibers , oxygen , pulmonary surfactant , selectivity , inorganic chemistry , nanotechnology , chemistry , electrochemistry , metallurgy , composite material , electrode , composite number , organic chemistry , engineering
Herein, we designed and synthesized a series of carbon‐supported cubic cobalt oxide (CoO x /C−T) hollow spheres annealed at different temperatures (T) by a simple and low‐cost “surfactant‐templated” route at room temperature. Furthermore, we investigated the effect of high‐temperature pyrolysis on electrocatalytic performance of the prepared cubic oxides towards oxygen reduction reaction (ORR) in alkaline medium. Among the three investigated samples (heat treated at 500 °C, 600 °C, 700 °C), CoO x /C‐600 nanoparticles, with the largest surface area (198 m 2 /g), showed a promising ORR performance with E 1/2 =0.78 V (vs. RHE) and E onset =0.88 V (vs. RHE), akin with the commercial Pt/C catalyst. In comparison, the CoO x /C‐600 electrocatalyst also exhibits higher ORR selectivity and longer durability under the investigated conditions.