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A hierarchical cathode catalyst layer architecture for improving the performance of direct methanol fuel cell

Cited 10 time in webofscience Cited 12 time in scopus
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Title
A hierarchical cathode catalyst layer architecture for improving the performance of direct methanol fuel cell
Author(s)
Sungjun Kim; Ji Eun Park; Wonchan Hwang; Yong-Hun Cho; Yung-Eun Sung
Subject
Cathode catalyst layer, ; Direct methanol fuel cell, ; Hierarchical Structure, ; Membrane electrode assembly, ; Methanol crossover
Publication Date
2017-07
Journal
APPLIED CATALYSIS B-ENVIRONMENTAL, v.209, pp.91 - 97
Publisher
ELSEVIER SCIENCE BV
Abstract
We report the fabrication of a hierarchical cathode catalyst layer (CL) for application in direct methanol fuel cells (DMFCs). The hierarchical CL, comprised of Pt black as the inner layer and Pt/C as the outer layer, has appropriate structural properties for DMFC cathode. The inner CL with compact structure decreases the CL thickness and prevent Pt sites from methanol contamination, and the cathode outer CL with porous structure increase the electrochemical active surface area. Consequently, the hierarchical cathode CL is able to offset the adverse effect of methanol crossover on the cathode performance by enhancing the Pt catalyst utilization for oxygen reduction reactions (ORR). Therefore, the newly developed membrane electrode assembly (MEA) can maintain the high ORR activity of the cathode catalysts despite the methanol crossover. At a high methanol concentration (3 M), it shows high maximum power density (0.156 W cm−2) despite only 1.0 mg cm−2 of Pt in the cathode CL. © 2017 Elsevier B.V
URI
https://pr.ibs.re.kr/handle/8788114/4209
DOI
10.1016/j.apcatb.2017.02.039
ISSN
0926-3373
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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15. Kim_et_al-2017-Applied_Catalysis_B.pdfDownload

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