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Ultra-thin platinum catalytic electrodes fabricated by atomic layer deposition

Title
Ultra-thin platinum catalytic electrodes fabricated by atomic layer deposition
Author
김영범
Keywords
OXIDE FUEL-CELLS; LOW-TEMPERATURE; HIGH-PERFORMANCE; PALLADIUM; FILMS
Issue Date
2013-03
Publisher
ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Citation
PHYSICAL CHEMISTRY CHEMICAL PHYSICS; 2013, 15, 20, p7520-p7525, 6p.
Abstract
Because noble metal catalysts (e. g. Pt) are one of the main contributors to low-temperature (<500 degrees C) fuel cell costs, significant efforts have been made to lower the noble metal loading in constructing fuel cell electrodes. In this work, ultra-thin (similar to 10 nm) platinum (Pt) cathode/catalyst layers were patterned by atomic layer deposition (ALD) and tested as catalytic electrodes (cathode) for low-temperature solid oxide fuel cells. We found that 180 cycles or approximately 10 nm of ALD Pt, with a Pt loading of only 0.02 mg cm(-2), were sufficient for the purpose of a catalytic cathode. Furthermore, this ALD Pt resulted in fuel cell performance comparable to that achieved by 80 nm-thick sputtered Pt. Transmission electron microscope (TEM) observations revealed the optimized number of ALD cycles of Pt for the catalytic electrode, which renders both contiguity and high triple-phase boundary (TPB) density. This result suggests the ability to significantly reduce Pt loading, thereby reducing the cost, and furthermore, can be easily applied to high performance fuel cells with complex 3-D structures.
URI
http://pubs.rsc.org/-/content/articlehtml/2013/cp/c3cp50996fhttp://hdl.handle.net/20.500.11754/44039
ISSN
1463-9076
DOI
10.1039/c3cp50996f
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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