Titanium Nitride Nanoparticle Electrocatalysts for Oxygen Reduction Reaction in Alkaline Solution

R. Ohnishi, M. Katayama, Dong Kyu Cha, Kazuhiro Takanabe, J. Kubota, K. Domen

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

Monodispersed TiN nanoparticles with a narrow size distribution (7–23 nm) were synthesized using mesoporous graphitic (mpg)-C3N4 templates with different pore sizes. The nano-materials were examined as electrocatalysts for oxygen reduction reaction (ORR) in alkaline media. The TiN nanoparticles were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), N2 sorption, transmission electron microscopy (TEM), and C-H-N elemental analysis. The ORR current increased as the TiN particle size decreased, and hence the surface area of TiN nanoparticles reactive to ORR increased. Rotating ring disk electrode (RRDE) measurements revealed that the ORR on TiN surfaces proceeded mainly via a two-electron pathway, producing H2O2 as the main product. Mechanistic aspects of ORR on TiN surfaces are discussed.
Original languageEnglish (US)
Pages (from-to)F501-F506
Number of pages1
JournalJournal of the Electrochemical Society
Volume160
Issue number6
DOIs
StatePublished - Mar 12 2013

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01

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