Titanium Nitride Nanoparticle Electrocatalysts for Oxygen Reduction Reaction in Alkaline Solution

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...

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Veröffentlicht in:Journal of the Electrochemical Society 2013-01, Vol.160 (6), p.F501-F506
Hauptverfasser: Ohnishi, Ryohji, Katayama, Masao, Cha, Dongkyu, Takanabe, Kazuhiro, Kubota, Jun, Domen, Kazunari
Format: Artikel
Sprache:eng
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Zusammenfassung: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.
ISSN:0013-4651
1945-7111
DOI:10.1149/2.053306jes