1
1- Birjand University of Technology, Department of Chemical Engineering, Birjand, I. R. Iran.
2
Research Institute of Petroleum Industry (RIPI), Tehran, I. R. Iran
Abstract
In the present study, PtRuCe/MWNTs nanocatalysts synthesized via polyol process technique are appliedas anode electro-catalyst in methanol electro-oxidation reaction (MOR). To characterize the nanocatalysts,TEM, XRD, EDS and XPS are investigated. Cyclic voltammetry and choronoamperometry are used to evaluatethe electro-catalytic activity and stability of the catalysts in methanol electro-oxidation, respectively. Furtheraddition of the Ce promoter to MWNTs-supported PtRu nanocatalyst shows the highest activity and the lowestonset potential in MOR at Ce to Pt molar ratio of 0.7. A significant enhancement of the forward anodic peak incyclic voltammetry experiments is observed for the Ce-promoted PtRu catalyst with cerium to platinum molar ratio of 0.7, i.e. 349 mA/cm2.mgPt , in comparison with 182 mA/cm2.mgPt and 251 mA/cm2.mgPt , respectively,corresponding to Pt/MWNTs and PtRu(1:1)/MWNTs nanocatalysts. Furthermore, the chronoamperommetry results present a remarkable improvement in the final current density of PtRuCe/MWNTs (6.1 mA/cm2),compared to the un-promoted catalysts, having a decreasing propensity, i.e. PtRu/MWNTs (3.7 mA/cm2) and Pt/MWNTs (2.05 mA/cm2.mgcat). The improved performance of PtRuCe/MWNTs may be attributed to theformation of highly-dispersed Pt nanoparticles on the support, followed by a significant enhancement of bifunctionalmechanism, as a result of cerium incorporation.
Esmaeili, E., Rashidi, A. M., & Jafari-Jozani, K. (2014). Cerium-Promoted PtRu/MWNTs As the Anode Catalyst for Methanol Electro-Oxidation. International Journal of Nanoscience and Nanotechnology, 10(2), 67-78.
MLA
E. Esmaeili; A. M. Rashidi; Kh. Jafari-Jozani. "Cerium-Promoted PtRu/MWNTs As the Anode Catalyst for Methanol Electro-Oxidation". International Journal of Nanoscience and Nanotechnology, 10, 2, 2014, 67-78.
HARVARD
Esmaeili, E., Rashidi, A. M., Jafari-Jozani, K. (2014). 'Cerium-Promoted PtRu/MWNTs As the Anode Catalyst for Methanol Electro-Oxidation', International Journal of Nanoscience and Nanotechnology, 10(2), pp. 67-78.
VANCOUVER
Esmaeili, E., Rashidi, A. M., Jafari-Jozani, K. Cerium-Promoted PtRu/MWNTs As the Anode Catalyst for Methanol Electro-Oxidation. International Journal of Nanoscience and Nanotechnology, 2014; 10(2): 67-78.