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AB(5)-type hydrogen...
AB(5)-type hydrogen storage alloys as catalysts in hydrogen-diffusion electrodes for novel H-2/hydride//perovskite/O-2 alkaline fuel cells
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Hu, W. K. (författare)
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- Kiros, Yohannes (författare)
- KTH,Kemiteknik
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Noreus, D. (författare)
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(creator_code:org_t)
- 2004-11-06
- 2004
- Engelska.
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Ingår i: Journal of Physical Chemistry B. - : American Chemical Society (ACS). - 1520-6106 .- 1520-5207. ; 108:48, s. 18530-18534
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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visa färre...
Abstract
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- Development of a non-noble-metal catalyst electrode is an important issue in the research and development of fuel cells. The catalytic activity and durability of AB(5)-type hydrogen storage alloys used in hydrogen-diffusion electrodes for alkaline fuel cells are evaluated. The experiments demonstrate that the activity and stability for hydrogen oxidation is greatly improved if the particle size is decreased from 5-30 to 1-10 mum. This also improves the electrode stability. SEM and XRD analyses show that no disintegration of the smaller catalyst particles is observed in long-term tests. A novel H-2/hydride//perovskite/O-2 alkaline fuel cell was constructed as a non-noble-metal fuel cell concept. The results showed that both gas-diffusion electrodes had high catalytic activities and good stability. A maximum power density of 54 mW/cm(2) was achieved at 120 mA/cm(2) when using H-2/O-2 and 49 mW/cm(2) at 100 mA/cm(2) when using H-2/air.
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