The Oxygen Reduction Reaction Rate of Metallic Nanoparticles during Catalyzed Oxidation

This work reports the oxygen reduction reaction (ORR) kinetics of metal nanoparticle catalysts between 500 and 600 °C at low oxygen partial pressures. Ex situ and in situ TEM measurements demonstrate catalyzed nanowire growth initially follows linear kinetics; characteristic of being ORR rate limite...

Descripción completa

Detalles Bibliográficos
Autores principales: Sun, Ke, Xue, Jinbo, Tai, Kaiping, Dillon, Shen J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5539166/
https://www.ncbi.nlm.nih.gov/pubmed/28765620
http://dx.doi.org/10.1038/s41598-017-07717-4
Descripción
Sumario:This work reports the oxygen reduction reaction (ORR) kinetics of metal nanoparticle catalysts between 500 and 600 °C at low oxygen partial pressures. Ex situ and in situ TEM measurements demonstrate catalyzed nanowire growth initially follows linear kinetics; characteristic of being ORR rate limited. The ORR rates of Ag, Au, Cu, Ni, Pd, Rh and Pt measured at 600 °C form a volcano plot versus relative oxidation potential. Cu nanoparticles produce the maximum ORR rate under these conditions.

Ejemplares similares