par Barroo, Cédric 
;De Decker, Yannick ;Visart de Bocarmé, Thierry ;Kruse, Norbert
Référence The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces, 118, page (6839-6846)
Publication Publié, 2014-04-03
;De Decker, Yannick ;Visart de Bocarmé, Thierry ;Kruse, Norbert Référence The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces, 118, page (6839-6846)
Publication Publié, 2014-04-03
Article révisé par les pairs
| Résumé : | We studied the catalytic reduction of NO2 with hydrogen on platinum model catalysts by means of field emission techniques. Atomic resolution field ion microscopy (FIM) was used to characterize Pt samples conditioned as tips. The catalytic reaction was investigated with video frequency resolution using field electron emission microscopy (FEM). Kinetic instabilities eventually merging into self-sustained periodic oscillations were observed. Data analyses revealed monomodal and bimodal oscillations as well as the coexistence of both mono-and bimodal regimes. Fourier transforms and interpeak intervals were used to characterize these different modes. We propose a mechanism that qualitatively explains the emergence of oscillations and the appearance of bimodal oscillations. © 2014 American Chemical Society. |
