TY - JOUR
T1 - Performance and stability of Pd nanostructures in an alkaline direct ethanol fuel cell
AU - Carrera-Cerritos, R.
AU - Fuentes-Ramírez, R.
AU - Cuevas-Muñiz, F. M.
AU - Ledesma-García, J.
AU - Arriaga, L. G.
N1 - Funding Information:
The authors acknowledge the use of the WVU Shared Research Facilities (XPS data) and M.T. Carrillo (UG) for the document revision. Thanks to CONACYT for financial support through project Fomix-Querétaro grant 193148 . R. Carrera-Cerritos wish to thank CONACYT for the financial support during his Ph.D. studies, Grant No. 213850 .
PY - 2014/12/10
Y1 - 2014/12/10
N2 - Pd nanopolyhedral, nanobar and nanorod particles were synthesised using the polyol process and evaluated as anodes in a direct ethanol fuel cell. The materials were physico-chemically characterised by high-resolution transmission electronic microscopy (HR-TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The effect of the operation parameters (i.e., temperature and fuel ethanol concentration) on the maximum power density (MPD) and open circuit voltage (OCV) was investigated. In addition, a stability test was performed by applying three current density steps for fifty cycles. The OCV values increased as the temperature increased for all of the catalysts at low ethanol concentration. Although the MPD increased with temperature for all of the catalyst independent of the ethanol concentration, the effect of the temperature on the MPD for each Pd structure results in different slopes due to the different crystal faces. Finally, a loss of electro-catalytic activity after fifty cycles was observed in all of the catalysts evaluated, which may be in response to morphological changes in the nanostructures.
AB - Pd nanopolyhedral, nanobar and nanorod particles were synthesised using the polyol process and evaluated as anodes in a direct ethanol fuel cell. The materials were physico-chemically characterised by high-resolution transmission electronic microscopy (HR-TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The effect of the operation parameters (i.e., temperature and fuel ethanol concentration) on the maximum power density (MPD) and open circuit voltage (OCV) was investigated. In addition, a stability test was performed by applying three current density steps for fifty cycles. The OCV values increased as the temperature increased for all of the catalysts at low ethanol concentration. Although the MPD increased with temperature for all of the catalyst independent of the ethanol concentration, the effect of the temperature on the MPD for each Pd structure results in different slopes due to the different crystal faces. Finally, a loss of electro-catalytic activity after fifty cycles was observed in all of the catalysts evaluated, which may be in response to morphological changes in the nanostructures.
KW - Direct ethanol fuel cell
KW - Pd-nanobar
KW - Pd-nanopolyhedral
KW - Pd-nanorod
UR - http://www.scopus.com/inward/record.url?scp=84905020741&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2014.06.161
DO - 10.1016/j.jpowsour.2014.06.161
M3 - Artículo
SN - 0378-7753
VL - 269
SP - 370
EP - 378
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -