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Cobalt/Carbon Nanocomposite as Oxygen Evolution Reaction Electrocatalyst
Author(s) -
Biegun Marcin,
Chen Xuecheng,
Mijowska Ewa
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.201800355
Subject(s) - overpotential , electrocatalyst , cobalt , oxygen evolution , catalysis , carbonization , materials science , chemical engineering , nanocomposite , carbon fibers , cationic polymerization , electrolysis , inorganic chemistry , oxygen , chemistry , electrochemistry , nanotechnology , polymer chemistry , composite number , composite material , organic chemistry , electrode , scanning electron microscope , engineering , electrolyte
Electrocatalysts based on cobalt are promising catalytic materials for water electrolysis. In this work, We reported a catalyst composed of cobalt nanoparticles embeded in a carbon lattice through synthesis with a cationic polymer (PEI) and carbonization process at three temperatures (800, 900 and 1000 °C). The material obtained at 1000 °C showed the highest activity towards the oxygen evolution reaction (OER) in an alkaline medium (1 M KOH). Moreover, the OER overpotential required to reach 10 mA cm −2 of 296 mV, was lower than for the commercial RuO 2 catalyst. Further, the material also exhibited very good stability in a long‐term stability test at 10 mA cm −2 .