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DOI	10.1039/c6ee03005j
	Is the rapid initial performance loss of Fe/N/C non precious metal catalysts due to micropore flooding?
	Choi J.-Y.; Yang L.; Kishimoto T.; Fu X.; Ye S.; Chen Z.; Banham D.
发表日期	2017
ISSN	17545692
起始页码	296
结束页码	305
卷号	10 期号:1
英文摘要	The activity of non-precious metal catalysts (NPMCs) has now reached a stage at which they can be considered as possible alternatives to Pt for some proton exchange membrane fuel cell (PEMFC) applications. However, challenges still remain in achieving acceptable stability (performance during potentiostatic or galvanostatic experiments). The most widely reported hypotheses for the instability of NPMCs include de-metalation, protonation/anion binding, and generation of H2O2. Recently, it has been proposed that the largest contribution to the instability of NPMCs is from flooding of micropores within the catalyst particles leading to significant mass transport limitations. While indirect evidence has been obtained that appears to support this hypothesis, no study has yet been performed to directly target micropore flooding. In this work, a systematic study is performed to investigate micropore flooding in situ before and after stability testing. The results do not support micropore flooding as being a large contributor to instability, at least for the family of NPMCs evaluated in this work. The protocol outlined here can be used by other researchers in the NPMC community to diagnose micropore flooding in their own respective catalysts. © The Royal Society of Chemistry 2017.
英文关键词	Catalysts; Floods; Fuel cells; Microporosity; Precious metals; Stability; Catalyst particles; Galvanostatics; Mass transport limitation; Non-precious metal catalysts; Performance loss; Potentiostatics; Stability testing; Systematic study; Proton exchange membrane fuel cells (PEMFC); anion; catalyst; flooding; fuel cell; hydrogen peroxide; instability; mass transport; membrane; performance assessment; precious metal
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190582
作者单位	Department of Chemical Engineering, University of Waterloo, 200 University Ave. W., Waterloo, ON N2L 3G1, Canada; Ballard Power Systems, 9000 Glenlyon Parkway, Burnaby, BC V5J 5J8, Canada; Nisshinbo Holdings Inc., Business Development Department, 1-2-3 Onodai, Midori-ku, Chiba 267-0056, Japan
推荐引用方式 GB/T 7714	Choi J.-Y.,Yang L.,Kishimoto T.,et al. Is the rapid initial performance loss of Fe/N/C non precious metal catalysts due to micropore flooding?[J],2017,10(1).
APA	Choi J.-Y..,Yang L..,Kishimoto T..,Fu X..,Ye S..,...&Banham D..(2017).Is the rapid initial performance loss of Fe/N/C non precious metal catalysts due to micropore flooding?.Energy & Environmental Science,10(1).
MLA	Choi J.-Y.,et al."Is the rapid initial performance loss of Fe/N/C non precious metal catalysts due to micropore flooding?".Energy & Environmental Science 10.1(2017).