TY - JOUR
T1 - Direct alcohol fuel cells
T2 - Increasing platinum performance by modification with sp-group metals
AU - Figueiredo, Marta C.
AU - Sorsa, Olli
AU - Doan, Nguyet
AU - Pohjalainen, Elina
AU - Hildebrand, Helga
AU - Schmuki, Patrik
AU - Wilson, Benjamin P.
AU - Kallio, Tanja
N1 - Funding Information:
The financial support from Aalto University is acknowledged. This work made use of the Aalto University Nanomicroscopy Center (Aalto-NMC) premises. The J.W.T. Jones Travelling Fellowship of the Royal Society of Chemistry is thanked for funding Dr. B. P. Wilson's visit to Friedrich-Alexander-Universität Erlangen-Nürnberg and the fruitful discussions with Dr. Kirsi Yliniemi are also acknowledged.
Publisher Copyright:
© 2014 Elsevier B.V. All rights reserved.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2015/2/1
Y1 - 2015/2/1
N2 - By using sp group metals as modifiers, the catalytic properties of Pt can be improved toward alcohols oxidation. In this work we report the performance increase of direct alcohol fuel cells (DAFC) fuelled with ethanol or 2-propanol with platinum based anode electrodes modified with Bi and Sb adatoms. For example, by simply adding Sb to the Pt/C based anode ink during membrane electrode assembly fabrication of a direct ethanol fuel cell (DEFC) its performance is improved three-fold, with more than 100 mV increase in the open circuit potential. For the fuel cell fuelled with 2-propanol high power densities are obtained at very high potentials with these catalyst materials suggesting a great improvement for practical applications. Particularly in the case of Pt/C-Bi, the improvement is such that within 0.6 V (from 0.7 to 0.1 V) the power densities are between 7 and 9 mW/cm2. The results obtained with these catalysts are in the same range as those obtained with other bimetallic catalysts comprising of PtRu and PtSn, which are currently considered to be the best for these type of fuel cells and that are obtained by more complicated (and consequently more expensive) methods.
AB - By using sp group metals as modifiers, the catalytic properties of Pt can be improved toward alcohols oxidation. In this work we report the performance increase of direct alcohol fuel cells (DAFC) fuelled with ethanol or 2-propanol with platinum based anode electrodes modified with Bi and Sb adatoms. For example, by simply adding Sb to the Pt/C based anode ink during membrane electrode assembly fabrication of a direct ethanol fuel cell (DEFC) its performance is improved three-fold, with more than 100 mV increase in the open circuit potential. For the fuel cell fuelled with 2-propanol high power densities are obtained at very high potentials with these catalyst materials suggesting a great improvement for practical applications. Particularly in the case of Pt/C-Bi, the improvement is such that within 0.6 V (from 0.7 to 0.1 V) the power densities are between 7 and 9 mW/cm2. The results obtained with these catalysts are in the same range as those obtained with other bimetallic catalysts comprising of PtRu and PtSn, which are currently considered to be the best for these type of fuel cells and that are obtained by more complicated (and consequently more expensive) methods.
KW - 2-Propanol
KW - Bimetallic catalysts
KW - Ethanol
KW - Fuel cells
UR - http://www.scopus.com/inward/record.url?scp=84910603002&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2014.11.034
DO - 10.1016/j.jpowsour.2014.11.034
M3 - Article
AN - SCOPUS:84910603002
SN - 0378-7753
VL - 275
SP - 341
EP - 350
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -
