质子交换膜燃料电池
铂金
催化作用
材料科学
燃料电池
膜
化学工程
核工程
功率(物理)
化学
工程类
物理
生物化学
量子力学
作者
Anusorn Kongkanand,Mark F. Mathias
标识
DOI:10.1021/acs.jpclett.6b00216
摘要
Substantial progress has been made in reducing proton-exchange membrane fuel cell (PEMFC) cathode platinum loadings from 0.4–0.8 mgPt/cm2 to about 0.1 mgPt/cm2. However, at this level of cathode Pt loading, large performance loss is observed at high-current density (>1 A/cm2), preventing a reduction in the overall stack cost. This next developmental step is being limited by the presence of a resistance term exhibited at these lower Pt loadings and apparently due to a phenomenon at or near the catalyst surface. This issue can be addressed through the design of catalysts with high and stable Pt dispersion as well as through development and implementation of ionomers designed to interact with Pt in a way that does not constrain oxygen reduction reaction rates. Extrapolating from progress made in past decades, we are optimistic that the concerted efforts of materials and electrode designers can resolve this issue, thus enabling a large step toward fuel cell vehicles that are affordable for the mass market.
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