Durability evaluation of a Fe-N-C catalyst in polymer electrolyte fuel cell environment via accelerated stress tests

被引：65

作者：

Osmieri, Luigi ^{[1
]}

Cullen, David A. ^{[2
]}

Chung, Hoon T. ^{[3
]}

Ahluwalia, Rajesh K. ^{[4
]}

Neyerlin, K. C. ^{[1
]}

机构：

[1] Natl Renewable Energy Lab, Golden, CO 80401 USA

[2] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA

[3] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[4] Argonne Natl Lab, Lemont, IL 60439 USA

来源：

NANO ENERGY | 2020年 / 78卷

关键词：

PGM-Free catalyst; Durability; Accelerated stress test; Kinetic overpotential; Active sites loss; OXYGEN-REDUCTION REACTION; NONPRECIOUS METAL ELECTROCATALYSTS; ACTIVE-SITES; CARBON NANOTUBES; PERFORMANCE; ORR; IRON; RESISTANCE; STABILITY; ENERGY;

D O I：

10.1016/j.nanoen.2020.105209

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An "atomically-dispersed" iron-nitrogen-carbon (Fe-N-C) catalyst was used to provide a systematic comparison of platinum group metal (PGM)-free electrocatalyst degradation as a function of accelerated stress tests (ASTs) in an acidic polymer electrolyte fuel cell (PEFC). It was determined that the majority of catalyst degradation was caused by cell operation in presence of O-2. In contrast, potential cycling of the Fe-N-C-containing cathode under inert atmosphere over typical PEFC cathode operation from 0.95 to 0.6 V had little to no effect. The increase in kinetic overpotential is shown to be the major source of the PEFC performance decrease during the ASTs. These results continue to showcase the need for development of robust PGM-free electrocatalysts in concert with improved electrochemical performance.

引用

页数：10

共 85 条

[81] Is iron involved in the lack of stability of Fe/N/C electrocatalysts used to reduce oxygen at the cathode of PEM fuel cells? [J].