Transient behavior of CO poisoning of the anode catalyst layer of a PEM fuel cell

Chu, Hsin‐Sen; Wang, C.P.; Liao, Wenhao; Yan, Wei‐Mon

doi:10.1016/j.jpowsour.2005.12.045

Cited by 37 publications

(20 citation statements)

References 30 publications

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“…This result is in agreement with the experiments in [54] (and references therein), where the authors concluded an optimal Pt-Ru ratio of between 1-1 and 1-3. Moreover, it supports the applicability of the bifunctional mechanism (34). The results shown in Fig.…”

Section: Effects Of Pt-ru Alloyssupporting

confidence: 77%

“…Parameter fitting of some of the electrochemical rate constants was found to be necessary, as in [25][26][27][28][29]33,34]. Several other parameters are estimated (as indicated in Tables 5-7), and the rest are found from the literature (with references provided).…”

Section: Initial-boundary Conditions Numerical Details and Parametersmentioning

confidence: 99%

“…Similarly, the ACL terms S φ e and S φ s in Eq. (7) are modified to account for proton and electron generation in (34). Therefore, in Table 2 …”

Section: Effects Of Pt-ru Alloysmentioning

confidence: 99%

“…Bhatia and Wang [29] studied the transient problem by simplifying the kinetics proposed by Springer et al and neglecting the transport phenomena, restricting their attention to the ACL. A similar model, which includes the diffusion of gas, can be found in [34]. A different approach can be found in [35], in which there is assumed to be a competition between linearly bonded and bridge-bonded adsorption, in contrast to the purely linear-bonded models in [25][26][27][28][29]33,34].…”

Section: Introductionmentioning

confidence: 99%

“…A similar model, which includes the diffusion of gas, can be found in [34]. A different approach can be found in [35], in which there is assumed to be a competition between linearly bonded and bridge-bonded adsorption, in contrast to the purely linear-bonded models in [25][26][27][28][29]33,34]. This model neglects the transport problem, is steady-state, employs temperature-independent rate constants and simplifies the CO adsorption kinetics.…”

Section: Introductionmentioning

confidence: 99%

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A transient PEMFC model with CO poisoning and mitigation by O2 bleeding and Ru-containing catalyst

Shah

Sui

Kim

et al. 2007

Journal of Power Sources

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In this paper we present a transient, fully two-phase, non-isothermal model of carbon monoxide poisoning and oxygen bleeding in the membrane electrode assembly of a polymer electrolyte fuel cell. The model includes a detailed description of mass, heat and charge transport, chemisorption, electrochemical oxidation and heterogeneous catalysis (when oxygen is introduced). Example simulation results demonstrate the ability of the model to qualitatively capture the fundamental features of the poisoning process and the extent of poisoning with respect to channel temperature and concentration. Further examples show how the multi-step kinetics can interact with other physical phenomena such as liquid-water flooding, particularly in the anode. Carbon monoxide pulsing is simulated to demonstrate that the complicated reaction kinetics of oxygen bleeding can be captured and even predicted. It is shown that variations in the channel temperature have a convoluted effect on bleeding, and that trends in performance on relatively short time scales can be the precise opposite of the trends observed at steady state. We incorporate a bi-functional mechanism for carbon monoxide oxidation on platinum-ruthenium catalysts, demonstrating the marked reduction in the extent of poisoning, the effect of variations in the platinum-ruthenium ratio and the influence of temperature. Finally, we discuss the implications of the results, extensions to the model and possible avenues for experimental work.

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Section: Effects Of Pt-ru Alloyssupporting

confidence: 77%