title: Synthesis of nanoporous carbon-cobalt-oxide hybrid electrocatalysts by thermal conversion of metal-organic frameworks.
abstract: Nanoporous carbon-cobalt-oxide hybrid materials are prepared by a simple, two-step, thermal conversion of a cobalt-based metal-organic framework (zeolitic imidazolate framework-9, ZIF-9). ZIF-9 is carbonized in an inert atmosphere to form nanoporous carbon-metallic-cobalt materials, followed by the subsequent thermal oxidation in air, yielding nanoporous carbon-cobalt-oxide hybrids. The resulting hybrid materials are evaluated as electrocatalysts for the oxygen-reduction reaction (ORR) and the oxygen-evolution reaction (OER) in a KOH electrolyte solution. The hybrid materials exhibit similar catalytic activity in the ORR to the benchmark, commercial, Pt/carbon black catalyst, and show better catalytic activity for the OER than the Pt-based catalyst.
authors.affiliation: World Premier International (WPI) Research Center for Materials, Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan), Homepage: http:www.yamauchi-labo.com.
authors.forename: Watcharop
authors.initials: W
authors.lastname: Chaikittisilp
authors.forename: Nagy L
authors.initials: NL
authors.lastname: Torad
authors.forename: Cuiling
authors.initials: C
authors.lastname: Li
authors.forename: Masataka
authors.initials: M
authors.lastname: Imura
authors.forename: Norihiro
authors.initials: N
authors.lastname: Suzuki
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Ishihara
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Ariga
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Yamauchi
keywords: cobalt oxide; electrocatalysts; mesoporous carbon; metal-organic frameworks; nanoporous carbon