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Boosting electrochemical stability of ultralow-Pt nanoparticle with Matryoshka-like structure in polymer electrolyte membrane fuel cells

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Title
Boosting electrochemical stability of ultralow-Pt nanoparticle with Matryoshka-like structure in polymer electrolyte membrane fuel cells
Author(s)
Hyunjoon Lee; Ji Eun Park; Kim O.-H.; Wonchan Hwang; Choi H.J.; Yang J.C.; Chi-Yeong Ahn; Su Lim M.; Choi I.; Cho Y.-H.; Yung-Eun Sung
Subject
Fuel cells, ; Matryoshka, ; Membrane-electrode assembly, ; Oxygen reduction reaction, ; Platinum
Publication Date
2020-07
Journal
APPLIED CATALYSIS B-ENVIRONMENTAL, v.268, pp.118450
Publisher
ELSEVIER SCIENCE BV
Abstract
© 2019 Elsevier B.V. Electrochemical catalysts with a core-shell structure have received much attention because of their enhanced efficiency and activity. Among them, those with a CuPd alloy core exhibit better activity than the ones with a single metal Pd core, which is known to be an excellent core-material. However, the superior performance of previously reported Pt catalysts with CuPd core has only been observed in half-cells, and was not reflected or even expanded to single-cells. We report catalysts having a Matryoshka-like structure with a Pt outer-layer, Cu interlayer, and Pd core for oxygen reduction reaction. This catalyst has 3.4 times higher Pt mass activity than the commercial Pt/C in half-cells, and also performs better in single-cells at only 0.056 mgPt cm−2. Particularly, the stability of this catalyst satisfies the 2020 DOE target, and electrochemical surface area loss during the stability test is only 40 % for this catalyst, while that of Pt/C is 80 %
URI
https://pr.ibs.re.kr/handle/8788114/7796
DOI
10.1016/j.apcatb.2019.118450
ISSN
0926-3373
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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