Journal
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
Volume 11, Issue 6, Pages 821-828Publisher
SPRINGER
DOI: 10.1007/s10008-006-0228-6
Keywords
carbon supports; platinum nanoparticles; electrochemical behaviors; catalyst electrodes; direct methanol fuel cells
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Funding
- Ministry of Education, Science & Technology (MoST), Republic of Korea [KK-0702-C0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Binary carbon-supported platinum (Pt) nanoparticles were prepared by a chemical reduction method of Pt precursor on two types of carbon materials such as carbon blacks (CBs) and graphite nanofibers (GNFs). Average sizes and loading levels of Pt metal particles were dependent on a mixing ratio of two carbon materials. The highest electroactivity for methanol oxidation was obtained by preparing the binary carbon supports consisting of GNFs and CBs with a weight ratio of 30:70. Furthermore, with an increase of GNFs content from 0% to 30%, a charge-transfer resistance changed from 19 Ohm cm(2) to 11 Ohm cm(2). The change of electroactivity or the resistance of catalyst electrodes was attributed to the changes of specific surface area and morphological changes of carbon-supported catalyst electrodes by controlling the mixing ratio of GNFs and CBs.
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