title: Iron-nitrogen-doped mesoporous tungsten carbide nanostructures as oxygen reduction electrocatalysts.
abstract: Since Pt-based catalysts have the disadvantages of high cost, large overpotential loss, and limited long-term stability, there have been various promising alternatives to Pt-based catalysts to improve the catalytic activity towards the oxygen reduction reaction (ORR). We have synthesized iron-nitrogen-doped mesoporous tungsten carbide catalysts (WC-m-FT) by pyrolysis of well-ordered mesoporous tungsten carbides with iron porphyrin. WC-m-FT exhibits excellent ORR catalytic activity in an alkaline medium, i.e. a high electron-transfer number as well as superior stability and methanol tolerance. The improved activity and stability of WC-m-FT are ascribed to iron-containing catalytic active sites surrounded by nitrogen species and the well-defined mesoporous tungsten carbide structure.
authors.affiliation: Department of Chemical Engineering, Soongsil University, Seoul 156743, Republic of Korea. kwpark@ssu.ac.kr.
authors.forename: Je-Suk
authors.initials: JS
authors.lastname: Moon
authors.forename: Young-Woo
authors.initials: YW
authors.lastname: Lee
authors.forename: Sang-Beom
authors.initials: SB
authors.lastname: Han
authors.forename: Da-Hee
authors.initials: DH
authors.lastname: Kwak
authors.forename: Kyung-Hoon
authors.initials: KH
authors.lastname: Lee
authors.forename: Ah-Reum
authors.initials: AR
authors.lastname: Park
authors.forename: Jung Inn
authors.initials: JI
authors.lastname: Sohn
authors.forename: Seung Nam
authors.initials: SN
authors.lastname: Cha
authors.forename: Kyung-Won
authors.initials: KW
authors.lastname: Park