Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 38, Issue 8, Pages 3387-3394Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2012.12.097
Keywords
Direct methanol fuel cells; Nonprecious catalysts; Cadmium-doped cobalt; Sol-gel
Categories
Funding
- Ministry of Education, Science Technology (MEST)
- National Research Foundation of Korea (NRF) through the Human Resource Training Project for Regional Innovation and Leaders in Industry-University Cooperation Project
- NPST program by King Saud University [11-ENE1721-02]
- National Research Foundation of Korea [2012H1B8A2025931] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Cd-doped Cobalt nanoparticles encapsulated in graphite shell have been synthesized using a simple sol-gel technique. Typically, a sol-gel composed of cadmium acetate, cobalt acetate and poly(vinyl alcohol) has been prepared based on the polycondensation property of the acetates. The utilized physiochemical characterizations affirmed that drying, grinding and calcination in Ar atmosphere of the prepared gel leads to produce Cd-doped Co nanoparticles encapsulated in a thin graphite layer. The prepared nanoparticles revealed good electroactivity towards methanol electrooxidation. High current density (70 mAcm(-2)) and considerably low onset potential (similar to 600 mV vs. NHE) were obtained. Moreover, because of the graphite shell, good stability was observed. Considering that the introduced nanoparticles composed of nonprecious metals and the obtained electrochemical results are satisfactory, the introduced study might open new avenues for the cobalt-based nanostructures to be used as novel effective electrocatalysts in the fuel cells applications. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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