The role of membrane ion exchange capacity on membrane|gas diffusion electrode interfaces: a half-fuel cell electrochemical study

Navessin, Titichai; Holdcroft, Steven; Wang, Qianpu; Song, Datong; Liu, Zhong‐Sheng; Eikerling, Michael; Horsfall, J.A.; Lovell, Keith V.

doi:10.1016/j.jelechem.2003.12.042

Cited by 34 publications

(30 citation statements)

References 20 publications

(33 reference statements)

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“…6 with the surface areas in Table 1, we can see that the electrochemically accessible surface areas are lower than the geometrical film coverage. This is often seen in fuel cell experiments [34]. In our experimental setup, this might indicate that the electrical contact of the thin films with the gas backing is not complete.…”

Section: Discussionmentioning

confidence: 75%

Thin film Pt/TiO2 catalysts for the polymer electrolyte fuel cell

Gustavsson

Ekström

Hanarp

et al. 2007

Journal of Power Sources

106

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Section: Discussionmentioning

confidence: 75%

Thin film Pt/TiO2 catalysts for the polymer electrolyte fuel cell

Gustavsson

Ekström

Hanarp

et al. 2007

Journal of Power Sources

106

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“…The mean free path for O 2 , estimated using the kinetic theory of gases, is ϳ60 nm. 17 At pore sizes much larger than the mean free path, surface adsorption leading to capillary condensation or Knudsen diffusion in a confined space is assumed to be negligible. The fact that for all the samples the standard deviation of D eq was less than 1% of the mean value demonstrates that precise experimental results can be achieved with the Loschmidt diffusion cell and Eq.…”

Section: Resultsmentioning

confidence: 99%

Note: Determination of effective gas diffusion coefficients of stainless steel films with differently shaped holes using a Loschmidt diffusion cell

Astrath

Shen

Astrath

et al. 2010

Review of Scientific Instruments

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Note: Determination of effective gas diffusion coefficients of stainless steel films with differently shaped holes using a Loschmidt diffusion cell Astrath, N. G. C.; Shen, J.; Astrath, F. B. G.; Zhou, J.; Huang, C.; Yuan, X. Z.; Wang, H.; Navessin, T.; Liu, Z. S.; Vlajnic, G.; Bessarabov, D.; Zhao, X.Note: Determination of effective gas diffusion coefficients of stainless steel films with differently shaped holes using a Loschmidt diffusion cell In this work, an in-house made Loschmidt diffusion cell is used to measure the effective O 2 -N 2 diffusion coefficients through four porous samples of different simple pore structures. One-dimensional through-plane mass diffusion theory is applied to process the experimental data. It is found that both bulk diffusion coefficient and the effective gas diffusion coefficients of the samples can then be precisely determined, and the measured bulk one is in good agreement with the literature value. Numerical computation of three-dimensional mass diffusion through the samples is performed to calculate the effective gas diffusion coefficients. The comparison between the measured and calculated coefficient values shows that if the gas diffusion through a sample is dominated by one-dimensional diffusion, which is determined by the pore structure of the sample, these two values are consistent, and the sample can be used as a standard sample to test a gas diffusion measurement system.

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“…The relations employed have proven appropriate in a number of modeling studies [13][14][15][16][17]. They could consistently explain effects of structure and composition on performance in relevant experimental studies [18][19][20][21].…”

Section: The Modelmentioning

confidence: 99%