TY - JOUR
T1 - Octahedral Co3O4/carbon nanofiber composite-supported Pt catalysts for improved methanol electrooxidation
AU - An, Hyelan
AU - An, Geon Hyoung
AU - Ahn, Hyo Jin
N1 - Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/5/26
Y1 - 2015/5/26
N2 - Octahedral Co3O4/carbon nanofibers (CNFs) composite-supported Pt catalysts are synthesized using electrospinning, hydrothermal, and reduction methods in sequence, and their structure, chemical bonding states, and electrochemical properties are investigated. To obtain the optimal support, the relative molar ratio of the Co precursor to the solution was adjusted to three different levels: 0.05 M (sample A), 0.1 M (sample B), and 0.2 M Co precursor (sample C). Sample B exhibited the highest electrocatalytic activity of ∼415.6 mA mgpt-1 and superb electrocatalytic stability compared to commercial Pt/C, Pt/conventional CNFs, sample A, and sample C. This performance improvement can be explained by the combined effects of optimally sized octahedral Co3O4 on the CNF matrix, resulting in the maximum dispersion of Pt catalysts, and the formation of Co(OH)2 phases, which hinder CO poisoning.
AB - Octahedral Co3O4/carbon nanofibers (CNFs) composite-supported Pt catalysts are synthesized using electrospinning, hydrothermal, and reduction methods in sequence, and their structure, chemical bonding states, and electrochemical properties are investigated. To obtain the optimal support, the relative molar ratio of the Co precursor to the solution was adjusted to three different levels: 0.05 M (sample A), 0.1 M (sample B), and 0.2 M Co precursor (sample C). Sample B exhibited the highest electrocatalytic activity of ∼415.6 mA mgpt-1 and superb electrocatalytic stability compared to commercial Pt/C, Pt/conventional CNFs, sample A, and sample C. This performance improvement can be explained by the combined effects of optimally sized octahedral Co3O4 on the CNF matrix, resulting in the maximum dispersion of Pt catalysts, and the formation of Co(OH)2 phases, which hinder CO poisoning.
KW - A hydrothermal method
KW - Electrocatalytic stability
KW - Electrospinning
KW - Methanol electrooxidation
KW - Octahedral CoO/CNF composites
KW - Pt catalysts
UR - http://www.scopus.com/inward/record.url?scp=84929998218&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2015.05.105
DO - 10.1016/j.jallcom.2015.05.105
M3 - Article
AN - SCOPUS:84929998218
SN - 0925-8388
VL - 645
SP - 317
EP - 321
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -