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Joo, Sang Hoon
Nanomaterials & Catalysis Lab
Research Interests
  • Catalyst, energy conversion, fuel cells, electrolyzer, ORR, HER, OER

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Nanoscale adhesion between Pt nanoparticles and carbon support and its influence on the durability of fuel cells

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Title
Nanoscale adhesion between Pt nanoparticles and carbon support and its influence on the durability of fuel cells
Author
Kim, Jong HunYuk, YoungjiJoo, Hye SookCheon, Jae YeongChoi, Han ShinJoo, Sang HoonPark, Jeong Young
Issue Date
2015-09
Publisher
ELSEVIER SCIENCE BV
Citation
CURRENT APPLIED PHYSICS, v.15, pp.S108 - S114
Abstract
We report an atomic force microscopy (AFM) based method to characterize the adhesion between metal nanoparticles and carbon support that plays an important role in determining the durability of fuel cells. This adhesion is related to the electrochemical active surface area (ECSA). Force-distance curves measured with a Pt-coated AFM tip on the surface of the support allows us to probe the adhesion between a Pt nanoparticle and the support because an asperity between a Pt-coated AFM tip and carbon support can mimic the nanoscale interface between Pt nanoparticles and carbon. We found that acid-based surface treatment of the carbon support increases the adhesion force by a factor of 4, compared with the as-received carbon support. Meanwhile, surface treatment using acid on the carbon support can lead to a higher ECSA, which is consistent with the higher adhesion force probed with AFM. We attribute the higher adhesion between the Pt probe and the acid-treated carbon to stronger chemical interaction by the C/O functional groups. (C) 2015 Elsevier B.V. All rights reserved
URI
https://scholarworks.unist.ac.kr/handle/201301/17743
URL
http://www.sciencedirect.com/science/article/pii/S1567173915001509
DOI
10.1016/j.cap.2015.04.031
ISSN
1567-1739
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