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Fe-N-C oxygen reduction catalysts supported on vertically aligned carbon nanotubes

Paper ID Volume ID Publish Year Pages File Format Full-Text
42890 45945 2008 7 PDF Available
Title
Fe-N-C oxygen reduction catalysts supported on vertically aligned carbon nanotubes
Abstract

Non-noble metal electrocatalyst (Fe-N-C) for the oxygen reduction reaction (ORR) was sputter deposited onto films of vertically aligned carbon nanotubes (VACNT) and tested by the rotating ring disk electrode (RRDE) technique. The VACNT support was first synthesized at atmospheric pressure on a SiO2/Si wafer substrate in a simple tube furnace by iron-catalyzed chemical vapor deposition of ethylene and ammonia at a temperature of 720 °C. VACNT films, with CNT bundle height of 1.5 μm and CNT diameter of 50 nm, were loaded into a sputtering machine to deposit Fe-N-C materials onto the VACNT as support. Iron and carbon were sputtered in a nitrogen atmosphere in order to deposit an amorphous mixture of Fe-N-C material on the VACNT films. The Fe-N-C material supported on the VACNT films was then annealed in Ar at 800 °C to make the ORR electrocatalyst. The catalyst-coated VACNT was scraped off the SiO2/Si substrate and made into catalyst ink for testing by the RRDE technique. The impact of catalyst loading on the RRDE performance (disk current density and %H2O2) is discussed.

Graphical abstractFe-N-C oxygen reduction reaction catalyst was sputter deposited vertically aligned carbon nanotubes (VACNTs) and activated by annealing to 800 °C. The catalyst activity was evaluated electrochemically and shown to be equivalent to the best Fe-N-C catalysts in the literature. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
CNT, carbon nanotube; CVD, chemical vapor deposition; cm, centimeter; DC, direct current; ORR, oxygen reduction reaction; RRDE, rotating ring disk electrode; RTP, rapid thermal processor; RHE, reversible hydrogen electrode; SEM, scanning electron microsco
First Page Preview
Fe-N-C oxygen reduction catalysts supported on vertically aligned carbon nanotubes
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 347, Issue 1, 1 September 2008, Pages 43–49
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis