Analysis of oxygen sources and reaction pathways of carbon support corrosion at the cathode in PEMFC using oxygen-18 DEMS

Li, Wei; Lane, Alan M.

doi:10.1016/j.electacta.2010.04.105

Cited by 29 publications

(22 citation statements)

References 30 publications

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“…This indicates that carbon corrosion in PEFC proceeds only in the presence of oxygen. This observation contradicts the results obtained by Li and Lane [23] who investigated the oxygen sources contributing to carbon support corrosion and established that water is the main direct oxygen source for the carbon corrosion. The difference in results could be due to the lower cell voltages (up to OCV) applied here and due to the fact that the measurements are performed under steady-state cell voltages.…”

Section: 6contrasting

confidence: 72%

The influence of the membrane thickness on the performance and durability of PEFC during dynamic aging

Radev

Koutzarov

Pfrang

et al. 2012

International Journal of Hydrogen Energy

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Section: 6contrasting

confidence: 72%

The influence of the membrane thickness on the performance and durability of PEFC during dynamic aging

Radev

Koutzarov

Pfrang

et al. 2012

International Journal of Hydrogen Energy

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“…on the carbon corrosion onset potential and on the amount of evolved CO 2 . [30][31][32][33][34][35][36] The impact of carbon corrosion under real operative conditions has also been investigated mainly in MEAs. [37][38][39] Among them few works focused on the carbon corrosion during extended cyclovoltammetry.…”

Section: Resultsmentioning

confidence: 99%

On the Need of Improved Accelerated Degradation Protocols (ADPs): Examination of Platinum Dissolution and Carbon Corrosion in Half-Cell Tests

Pizzutilo

Geiger

Grote

et al. 2016

J. Electrochem. Soc.

130

150

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In this work we employ the advanced scanning flow cell based analytical techniques, viz. inductively coupled plasma mass spectrometry (SFC-ICP-MS) and on-line electrochemical mass-spectrometry (SFC-OLEMS) to directly detect the amounts of dissolved platinum and evolved carbon dioxide in two protocols that are commonly used in the fuel cell community to simulate load cycle and start-stop conditions in proton exchange membrane fuel cells (PEMFCs). In contrast to previous assumptions, claiming a separation between carbon corrosion and platinum dissolution, in both standard protocols platinum dissolution and carbon corrosion are present at low rates, which is also reflected by a comparably low ECSA decrease. On the other hand, a huge increase in rate of both processes is observed during transitions from low to high potential regimes experienced by a PEMFC in operation, here studied in a third protocol covering the whole potential range from 0.6 to 1.5 V RHE . The latter is typically not addressed in literature. This finding is explained by taking into account platinum catalyzed carbon corrosion and transient platinum dissolution. Based on the obtained results, the question is raised on the practical adequacy of the standard protocols for differentiation of degradation processes and simulation of the degradation processes occurring in PEMFCs.

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“…[54,64] Based on this analysis, comprehensive investigations of carbon corrosion in cathode catalyst layers were reported in terms of the degree of graphitization. [54,64] Based on this analysis, comprehensive investigations of carbon corrosion in cathode catalyst layers were reported in terms of the degree of graphitization.…”

Section: Carbon Corrosionmentioning

confidence: 99%

Electrocatalysts for PEM Fuel Cells

Ioroi

Siroma

Yamazaki

et al. 2018

Advanced Energy Materials

165

120

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Degradation phenomena of electrocatalysts for proton‐exchange membrane fuel cells and their mechanisms are reviewed. Platinum dissolution and redeposition, carbon‐support corrosion, inhomogeneity during start‐up and cell reversal are discussed as factors that influence the degradation of electrocatalysts with relation to electrode potential. Early research findings at the National Institute of Advanced Industrial Science and Technology (AIST), Japan, are mainly used as a basis of discussion. The development of highly durable electrocatalysts using an oxide support based on the results of degradation studies to suppress electrocatalyst degradation is summarized with a main focus on Pt‐deposited Ti4O7 catalysts developed at AIST. The development of high‐CO‐concentration durable anode electrocatalysts is also reviewed. In particular, an electrocatalyst that uses an organic complex as a co‐electrocatalyst with a platinum ruthenium alloy anode electrocatalyst developed at AIST is included as a novel high‐CO‐concentration durable anode electrocatalyst.

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Analysis of oxygen sources and reaction pathways of carbon support corrosion at the cathode in PEMFC using oxygen-18 DEMS

Cited by 29 publications

References 30 publications

The influence of the membrane thickness on the performance and durability of PEFC during dynamic aging

The influence of the membrane thickness on the performance and durability of PEFC during dynamic aging

On the Need of Improved Accelerated Degradation Protocols (ADPs): Examination of Platinum Dissolution and Carbon Corrosion in Half-Cell Tests

Electrocatalysts for PEM Fuel Cells

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