Characterization of self-humidifying ability of SiO2-supported Pt catalyst under low humidity in PEMFC

Choi, Insoo; Lee, Hyunjoon; Lee, Kyoung G.; Ahn, Sang Hyun; Lee, Seok Jae; Kim, Hyun-Jong; Lee, Ho-Nyun; Kwon, Oh Joong

doi:10.1016/j.apcatb.2014.12.026

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Characterization of self-humidifying ability of SiO2-supported Pt catalyst under low humidity in PEMFC

Choi, Insoo;
Lee, Hyunjoon;
Lee, Kyoung G.;
Ahn, Sang Hyun;
Lee, Seok Jae;
외 3명

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30

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31

초록

SiO2-supported Pt composite catalyst was developed by ultrasonic technique, and applied as anode catalyst of PEMFC to improve the performance under non-humidified condition. Two different MEAs were prepared: one for adjusting Pt loading and the other for matching thickness to conventional Pt-only MEA. The characteristic tools, such as TEM, XPS, TGA, and FE-SEM were employed to characterize the composite catalyst and the MEAs thereof. The long-term performance of MEAs with the composite catalyst was evaluated under non-humidified and elevated temperature, and compared with that of Pt-only MEA. The self-humidifying ability of SiO2-supported Pt catalyst was examined by EIS technique. (C) 2014 Elsevier B.V. All rights reserved.

키워드

Pt nanoparticle; SiO2; Composite; Polymer electrolyte membrane fuel cell; Low humidity; Electrochemical impedance spectroscopy; MEMBRANE FUEL-CELL; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; POLYMER ELECTROLYTE MEMBRANES; COMPOSITE MEMBRANES; AC-IMPEDANCE; PARTICLES; LAYER; SIO2; PERFORMANCE; FABRICATION

제목: Characterization of self-humidifying ability of SiO2-supported Pt catalyst under low humidity in PEMFC

저자: Choi, Insoo; Lee, Hyunjoon; Lee, Kyoung G.; Ahn, Sang Hyun; Lee, Seok Jae; Kim, Hyun-Jong; Lee, Ho-Nyun; Kwon, Oh Joong

DOI: 10.1016/j.apcatb.2014.12.026

발행일: 2015-06

유형: Article

저널명: Applied Catalysis B: Environment and Energy

권: 168

페이지: 220 ~ 227