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Carbon-supported ordered Pt-Ti alloy nanoparticles as durable oxygen reduction reaction electrocatalyst for polymer electrolyte membrane fuel cells

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Title
Carbon-supported ordered Pt-Ti alloy nanoparticles as durable oxygen reduction reaction electrocatalyst for polymer electrolyte membrane fuel cells
Author(s)
Park H.-Y.; Jeon T.-Y.; Lee K.-S.; Yoo S.J.; Young-Eun Sung; Jang J.H.
Publication Date
2016-12
Journal
Journal of Electrochemical Science and Technology, v.7, no.4, pp.269 - 276
Publisher
The Korean Electrochemical Society한국전기화학회
Abstract
Carbon-supported ordered Pt-Ti alloy nanoparticles were prepared as a durable and efficient oxygen reduction reaction (ORR) electrocatalyst for polymer electrolyte membrane fuel cells (PEMFCs) via wet chemical reduction of Pt and Ti precursors with heat treatment at 800°C. X-ray diffraction analysis confirmed that the prepared electrocatalysts with Ti precursor molar compositions of 40% (PtTi40) and 25% (PtTi25) had ordered Pt3Ti and Pt8Ti structures, respectively. Comparison of the ORR polarization before and after 1500 electrochemical cycles between 0.6 and 1.1 V showed little change in the ORR polarization curve of the electrocatalysts, demonstrating the high stability of the PtTi40 and PtTi25 alloys. Under the same conditions, commercial carbon-supported Pt nanoparticle electrocatalysts exhibited a negative potential shift (10 mV) in the ORR polarization curve after electrochemical cycling, indicating degradation of the ORR activity. © 2016, Korean Electrochemical Society. All rights reserved
URI
http://pr.ibs.re.kr/handle/8788114/4278
DOI
10.5229/JECST.2016.7.4.269
ISSN
2093-8551
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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