Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 39, Issue 10, Pages 5399-5405Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2013.12.015
Keywords
Direct methanol fuel cells; PtCo/C catalyst; Oxygen reduction reaction; Thermal treatment
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Funding
- European Community [278054]
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A PtCo catalyst with an ordered cubic primitive structure was synthesized and investigated for the application as a cathode in direct methanol fuel cells. The synthesis involved the preparation of an amorphous PtOx/C precursor by the sulfite complex route, an impregnation with Co(NO3)(2), a high temperature (800 degrees C) carbothermal reduction and, finally, a leaching procedure. This method led to the occurrence of a Pt3Co/C catalyst with a primitive cubic ordered (L1(2)) phase and a mean crystallite size of 3.3 nm, as well as a suitable degree of alloying. This electrocatalyst was investigated for the oxygen reduction reaction in a direct methanol fuel cell (DMFC) operating in the range 30-90 degrees C. At 60 degrees C, under atmospheric pressure, a maximum power density of 40 mW cm(-2) was obtained with the new PtCo catalyst formulation at low noble metal loading on the electrode (1 mg cm(-2)). This performance was 2.3 times higher than a benchmark Pt catalyst used for comparison. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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