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Preparation of Pt/NiO-C electrocatalyst and heat-treatment effect on its electrocatalytic performance for methanol oxidation

Cited 61 time in Web of Science Cited 59 time in Scopus
Authors
Kim, Dong Baek; Chun, Hee-Joon; Lee, Yoon Kyung; Kwon, Heock-Hoi; Lee, Ho-In
Issue Date
2010
Publisher
Elsevier
Citation
International Journal of Hydrogen Energy 2010;35:313–320
Keywords
Direct methanol fuel cellPt catalystNiOMethanol oxidationHeat-treatment
Abstract
Pt catalyst supported on Vulcan XC-72R containing 5 wt% NiO (Pt/NiO–C) showed larger
electrochemical active surface area and higher electrochemical activity for methanol
oxidation than Pt catalyst supported on Vulcan XC-72R using polyol method without NiO
addition. Prepared Pt/NiO–C electrocatalyst was heat-treated at four temperatures
(200, 400, 600, and 800 C) in flowing N2. X-ray diffraction and temperature-programmed
desorption results indicated that NiO was reduced to Ni in inert N2 during heat-treatments
at temperatures above or equal to 400 C, while oxygen from NiO reacted with carbon
support due to the catalytic effect of Pt. The reduced Ni formed an alloy with Pt, which,
according to the X-ray photoelectron spectroscopy data, resulted in a shift to a lower
binding energy of Pt 4f electrons. The Pt/NiO–C electrocatalyst heat-treated at 400 C
showed the best activity in methanol oxidation due to the change in Pt electronic structure
by Ni and the minimal aggregation of Pt particles.
ISSN
0360-3199
Language
English
URI
https://hdl.handle.net/10371/61279
DOI
https://doi.org/10.1016/j.ijhydene.2009.10.037
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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